Yardmax R210-s User manual

YARDMAX~

Q-5

Gasoline

Engine

Operator's Manual

MODEL NUMBER

R210-S

SERIAL

NUMBER

PURCHASE

DATE

Both model number and serial

number may be found on the

main label.

You

should record

both

of

them in asafe place

for

future

use.

FOR

YOUR

SAFETY

Save This Manual

for

Future Reference

READ

AND

UNDERSTAND

THE

ENTIRE

MANUAL

BEFORE

OPERATING

MACHINE

Tame

the

Great

Outdoors·

1

Your newYARDMAX®engine offers qualityconstruction,

and

is

easy and safe

to

operate.

With

proper

use and

care,

it

is

designed

to

give you many years

of

dependable

service.

Prepare

to

experience the durability

to

take on any

job

with

the

ease,

portability,

and

convenience

of

your

new

engine!

Discover

theYARDMAXAdvantage

At

YARDMAX,

we

understand

that

land

ownership

definitely

has its privileges,

but

it

also comes

with

a

great

deal

of

responsibility.

When

duty

calls and you

need

to

respond, will you have what

it

takes

to

tame the

greatoutdoors?

When looking

for

outdoorpowerequipment

(OPE)

to

get

the job done right, at the right price, YARDMAXdelivers

the perfect combination

of

performance

and

practicality.

YARD

MAX

has

asolution that's right

for

you.

MAX

Performance,

MAX

Value,

MAX

Support -

that's YARDMAX

J

Backed

by decades

of

proven manufacturingexpertise

J Enhanced design features come standard

J Engineered

for

the best user experience

J Quality metal parts are

used

instead

of

plastic

J A robustwarrantysupports

all

products

J Budget-friendly prices

make

it

practical

YARDMAX~

Up

for

the

job?

YARD

MAX

is.

TABLE

OF

CONTENTS

Introduction 1 Operation 6

Specifications

3 Maintenance 8

Safety

3

Storage/Transporting

14

Know

Your

Engine

4

Troubleshooting

16

Controls

5

Technical

&

Consumer

Information 20

Check

before

Operation 6 Wiring

Diagram

23

California

And

Federal

Exhaust

And

Evaporative

Emissions

Control Warranty 24

Statement

I

Introduction

DISCLAIMER

Keep this owner's manual handy,

so

you

can

refer

to

it

at

anytime.

This owner's manual

is

considered a permanent part

of

the engine

and

should remain with the engine

if

resold.

The

information

and

specifications

included

in

this

publication

were

in

effect

at

the

time

of

approval

for

printing.

READ

THIS

OWNER'S

MANUAL

CAREFULLY.

Pay

special

attentiontothese symbols

and

any

instructionsthatfollow:

,

Warning!

Indicates serious

injury

or

death

will

result

if

instructions

are

not

followed.

Danger!

Indicates a strong possibility thatserious injury

or

death

could

result

if

instructions

are

not

followed.

Caution!

Indicates apossibility that minor injury or

an

result

if

instructions

are

not

followed.

Notice:

Indicates that equipment or property

damage

can

result

if

instructions

are

not

followed.

If

a problem should arise,

or

if

you have any questions

aboutyour engine, consultyourengine dealer.

Carefully

read

through this entire operator's manual

before using your new

engine.

Pay

attention to all

cautions

and

warnings.

ENVIRONMENTAL

Recycle

unwanted materials instead ofdisposing

of

0

#0J~

them

as

waste.

All

tools,

hoses,

and

packaging

should

-

be

taken

to

the

local

recycling

center

and

disposed

of

in

an

environmentally

safe

way.

Gasoline Engine » Operator's Manual

ENGINESERIAL

NUMBER

Record theengine serial numberon the

front

cover

of

this

manual.

You

will need this serial number when ordering

parts,

and

when makingtechnical

or

warranty inquires.

DISCLAIMER

YARDMAX reserves

the

right

to

discontinue, change,

and

improve

its

products

at

any

time

without

notice

or

obligation

to

the

purchaser. The

descriptions

and

specifications contained in this manual were in effect at

printing. Equipment described within this manual may

be

optional.

Some

illustrations may not

be

applicable

to

your

unit.

SUPPORT

Have questions aboutyour

YARD

MAXequipment?

Call

us

at

847-327-0566

or

844-YARDMAX, email

us

at [email protected],

or

contact

us

via your

favorite social media site.

Introduction I 2

SPEC

IF

I

CAT

I0

NS

Model

Type

Net

Power

(KW/3600rpm)

Max.

torque

(N•m/rpm)

Fuel consumption

(g/kW•h)

Idlespeed

Speed Fluctuating

Ratio

Transmission Mode

Reduction Ratio

BorexStroke(mm)

Displacement

(cc)

Compression Ratio

R210-S

Single cylinder, 4-Stroke,

Forced

Air

Cooling,

OHV

4.3

12.4/2500

:S10%

74.5x48

209

8:3:1

_,

Lubricatingmode Splash

Starting

Mo

:J_

e Recoil

start

R t t. Counter-clockwise (from

o a

1on

p-ro

.d

)

.1

••

SI

e

Valve Clearance

Sparkplug

clearance

Igniting Mode

Air

cleaner

input

valve: 0.05 mm

-0.10mm,

output

valve: 0.05

mm-0.10mm

0.7 mm

-0.8mm

Transistorized Magneto

Ignition

Semi-dry, Oil bath,

Foam

filter

Dimension

(Length) (mm)

Dimension

(Width) (mm) +-

360

290

Dimension (High)

(mm)

Net

weight(kg) r

325

12.5

The power rating

of

the engine indicated in this document is the

net

power

output

tested on a production engine

for

the

engine model and

measured in accordance

with

SAE

J1349

at

3,600 rpm (Net Power) and

at

2,500 rpm (Max.

Net

Torque). Mass productionengines may

vary

from

thisvalue.

Actual power

output

for

the

engine installed in thefinal machine will

vary

dependingon numerous factors, including

the

operatingspeed

of

theengine in application, environmental conditions, maintenance, and

other

variables.

SAFETY

IMPORTANT

SAFETY

INFORMATION

Most

accidents

with

engines can be prevented

if

you

follow

all

instructions in this manual and on

the

engine. Some

of

the

most

common hazards are discussed below, along

with

the

best

way

to

protect

yourselfand others.

OWNER

RESPONSIBILITIES

• Theengines aredesigned

to

givesafeand dependableservice

if

operated according

to

instructions.

Read

and understand this

owner's manual before operating

the

engine. Failure

to

do

so

could resultin personal

injury

or

equipmentdamage.

•

Know

how

to

stop

the

engine quickly, and understand

the

3 I

Specifications

&Safety

operation

of

all controls. Never

permit

anyone

to

operate

the

engine

without

proper

instructions.

•

Do

not

allow

children

to

operate

the

engine. Keep children and

pets

far

away

from

the

area

of

operation.

REFUEL

WITH

CARE

Gasoline

is

extremely flammable, and gasoline vapor can explode.

Refuel outdoors, in awell-ventilated area,

with

the

engine stopped.

Neversmoke neargasoline, and keep

other

flamesand sparks away.

Always storegasolinein

an

approvedcontainer.

If

anyfuel

is

spilled,

make sure

the

area is

dry

beforestarting

the

engine.

HOT

EXHAUST

• The

muffler

becomes

very

hot

during

operation and remains

hot

for

a while after stopping the engine.

Be

careful not

to

touch the muffler while

it

is

hot. Let the engine cool before

storing

it

indoors.

•

To

preventfire hazards

and

to

provideadequateventilation

for

stationary equipment applications, keep the engine at least 3

feet

(1

meter) away from building walls

and

other equipment

duringoperation. Do

not

place flammable objects close

to

the

engine.

CARBON

MONOXIDE

HAZARD

Exhaust

gas

contains poisonous carbon monoxide. Avoid

Gasoline Engine » Operator's Manual

inhalation

of

exhaust

gas.

Never run theengine in aclosed garage

or

confined

area.

OTHEREQUIPMENT

Review the instructions provided

with

the equipment powered

by this engine

for

any additional safety precautions

that

should

be

observed in conjunction

with

engine startup, shutdown,

operation,

or

protective apparel

that

may

be

needed

to

operate

the equipment.

KNOW

YOUR ENGINE

FEATURES

AND

CONTROLS

Muffler

Oil Filler

Cap

I Dipstick

Safety&

Know

Your

Engine

I 4

CONTROLS

FUEL

VALVE

LEVER

The fuel valve opens and closes

the

passage between the fuel

tank

and

the carburetor.

Thefuel valve levermust

be

in

theON position

for

the engine

to

run.

When the engine

is

not

in

use,

leave the fuel valve lever in the

OFF position

to

prevent carburetor flooding and

to

reduce

the

possibility

of

fuel leakage.

FUEL

VALVE

LEVER

THROTILE

LEVER

The

throttle

levercontrols engineTHROTILE

LEVER

speed.

Moving

the

throttle

lever in

the

directions

shown makes

the

engine run faster

or

slower.

ENGINE

SWITCH

The engine switch enables

and

disables the ignitionsystem.

The engineswitch must

be

in theON position

for

theengine

to

run.

Turningthe engine switch

to

theOFF position stops the engine.

5 I

Controls

CHOKE

LEVER

The

choke

lever

opens

and closes

the

choke

valve

in

the

carburetor.

The

CLOSE

position enriches the fuel mixture

for

starting a cold

engine.

The OPEN

position

provides

the

correct

fuel

mixture

for

operation afterstarting,

and

for

restartingawarm engine.

Some

engine applications

use

a remotely-mounted choke control

ratherthan theengine-mounted choke levershown here.

RECOIL

STARTER

GRIP

Pull the startergrip

to

crankthe engine.

Gasoline Engine » Operator's Manual

CHECK

BEFORE

OPERATION

IS

YOUR

ENGINE

READY

TO

GO?

For

your

safety,

and

to

maximize

the

service

life

of

your

equipment,

it

is

veryimportant

to

take a

few

moments beforeyou

operate

the

engine

to

check its condition.

Be

sure

to

take care

of

any problem you find,

or

have your servicing dealer correct it,

beforeyou operatetheengine.

Improperly maintaining this engine,

or

failing to

correct a problem before operation, could

cause

a

malfunction

in

which

you

could

be

seriously

injured.

Alwaysperform a

preoperation

inspection,

and

correct

any

problem.

Before beginning your preoperation checks,

be

sure the engine

is

level

and

theengine switch

is

in theOFF position.

CHECK

THE

GENERAL

CONDITION

OF

THE

ENGINE

e Look around and

underneath

the

engine

for

signs

of

oil

or

gasoline leaks.

eRemove

any excessive

dirt

or

debris, especially around

the

muffler

and

recoil starter.

e Look

for

signs

of

damage.

eCheck

that

all shields

and

covers are in place,

and

all nuts, bolts,

and

screws are tightened.

CHECK

THE

ENGINE

Check the engine oil level. Running theengine

with

a

low

oil level

can

cause

engine damage.

The Oil

Alert

system (applicable engine types) will automatically

stop

the

engine

before

the

oil

level

falls

below

safe

limits.

However,

to

avoid the inconvenience

of

an

unexpected shutdown,

always checkthe engine oil level before startup.

Check the air filter. A

dirty

air

filter

will

restrict

air

flow

to

the

carburetor, reducing engine performance.

Checkthe fuel level. Starting

with

afull tankwill help

to

eliminate

or

reduce operatinginterruptions

for

refueling.

CHECK

THE

EQUIPMENT

POWERED

BY

THIS

ENGINE

Review the instructions provided

with

the equipment powered

bythis engine

for

any precautions

and

procedures

that

should

be

followed beforeengine startup.

OPERATION

SAFE

OPERATING

PRECAUTIONS

Before operating the engine

for

the

first

time, please review the

IMPORTANT SAFETY INFORMATION and

the

chapter

titled

BEFORE

OPERATION.

Carbon

monoxide

gas

is

toxic. Breathing

it

can

cause

unconsciousness

and

even

kill

you.

Avoidany

areas

oractions that

expose

you

to

carbon

monoxide.

Review the instructions provided

with

the equipment powered

bythis engine

for

any safetyprecautions

that

should

be

observed

in conjunction

with

engine startup, shutdown,

or

operation.

STARTING

THE

ENGINE

1.

Movethefuel valve lever

to

theON position.

FUEL

VALVE

LEVER

2.

To

start

a cold engine, move

the

choke lever

to

the

CLOSE

position.

Check

Before

Operation

&Operation I 6

To

restart awarm engine, leave the choke lever in the

OPEN

position.

Some engine applications use a remotely-mounted choke

control rather than the engine-mounted choke lever shown

here.

3.

Movethe

throttle

leverawayfrom the SLOW position, about

1/3

of

thewaytoward the

FAST

position.

Some

engine applications

use

a remotely-mounted

throttle

control

rather

than

the

engine-mounted

throttle

lever

shown here.

4.

Turn theengine switch

to

the ON position.

5.

Operatethestarter.

RECOIL

STARTER

(all engine types):

Pull the startergrip lightlyuntil you feel resistance, then pull

briskly.

Return thestartergripgently.

7 I Operation

6.

If

the choke lever

has

been

moved

to

the

CLOSE

position

to

start the engine, gradually move

it

to

the

OPEN

position

as

the enginewarms

up.

CLOSE OPEN

STOPPING

THE

ENGINE

To

stopthe engine in

an

emergency, simplyturn theengine switch

to

the OFF position. Under normal conditions,

use

the following

procedure.

1.

Movethe

throttle

lever

to

theSLOW position.

Some

engine applications

use

a remotely-mounted

throttle

control

rather

than

the

engine-mounted

throttle

lever

shown here.

2.

Turn the engine switch

to

the OFF position.

3.

Turn thefuel valve lever

to

the

OFF

position.

FUEL

VALVE

LEVER

SETIING

ENGINE

SPEED

Position the

throttle

lever

for

thedesired engine

speed.

Gasoline Engine » Operator's Manual

Some engine

applications

use a

remotely-mounted

throttle

control

rather

than

the

engine-mounted

throttle

lever shown

here.

For engine speed recommendations,

refer

to

the

instructions

provided

with

the equipmentpowered bythis engine.

MAINTENANCE

THE

IMPORTANCE

OF

MAINTENANCE

Good maintenance

is

essential

for

safe,

economical,

and

trouble-

free operation.

It

will also help reduce airpollution.

Improperly

maintaining

this

engine,

or

failure

to

correct

a problem before operation, can cause a

malfunction in which you can be seriously

hurt

or

killed.

Always

follow

the

inspection

and

maintenance

recommendations

and

schedules in

this

owner's

manual.

To

help you properly care

for

your

engine, the following pages

include a maintenance schedule, routine inspection procedures,

and

simple maintenance procedures using basic hand tools.

Other

service tasks

that

are more difficult,

or

require special tools, are

best handled by professionals

and

are normally performed by a

technician

or

other

qualified mechanic.

The

maintenance

schedule

applies

to

normal

operating

conditions.

If

you operate your engine under unusual conditions,

such

as

sustained high-load

or

high-temperature operation,

or

use

in unusually

wet

or

dusty conditions, consult your servicing

dealer

for

recommendations applicable

to

your individual needs

and

use.

MAINTENANCE

SAFETY

PRECAUTIONS

Some

of

the

most

important

safety precautions are

as

follows:

However,

we

cannot

warn

you

of

every

conceivable hazard

that

can arise in performing maintenance. Only you can decide

whether

or

notyou should perform agiven task.

1.

Failure

to

properly follow maintenance instructions

and precautions

can

cause

you

to

be

seriously

hurt

or

killed.

Always follow the procedures and precautions in the

owner'smanual.

Make

sure

the

engine

is

off

before

you

begin

any

maintenance

or

repairs. This will eliminate several potential

hazards:

e Carbon monoxidepoisoning

from

engineexhaust.

Be

sure there

is

adequate ventilation wheneveryou operate

theengine.

e Burns

from

hot

parts.

Lettheengine

and

exhaustsystem cool beforetouching.

elnjury

from

movingparts.

Do notrun theengine unless instructed

to

do

so.

2.

Read

the instructions before you begin,

and

make sure you

have thetools and skills required.

3.

To

reduce the possibility

of

fire

or

explosion,

be

careful when

working around gasoline.

Use

only a nonflammable solvent,

not

gasoline,

to

clean parts. Keep cigarettes, sparks and

flames awayfrom all fuel-related parts.

Remember

that

your

servicing dealer knows

your

engine best

and

is

fully

equipped

to

maintain

and

repairit.

To

ensure the best quality

and

reliability, use only new, genuine

parts

or

their

equivalents

for

repair

and

replacement.

Operation

&

Maintenance

I 8

MAINTENANCE

SCHEDULE

The engine must be properlymaintained

to

ensure itsoperation be safe, economyand trouble-free,

as

well

as

eco-friendly.

In

order

to

keep

your

gasoline engine in good

working

condition,

it

must be periodically serviced. The

following

maintenance schedule

and

routine

inspection procedures mustbe carefullyfollowed

REGULAR

SERVICE

PERIOD

Performed ateveryindicated month

or

operating

hourinterval,whichever comes first.

ITEM

Check- Refill

• Engine oil Replace

Check- Refill

• Reduction gearoil Replace

Check

•

Air

cleaner Clean

Replace

• Sedimentcup Clean

• Spark plug Check-Adjust

Spark arrester Clean

(optional parts)

• Idlespeed Check-Adjust

• Valve clearance Check-Adjust

•

Fuel

tankand

Fuel

filter

Clean

•

Fuel

line Check

• Cylinder head, piston Clean up

carbon

e Emission-related items.

T:l

These itemsshould be replaced

if

replacement needed.

(1) Service more

frequently

when used in dustyareas.

Firstmonth

Every3

Everyyear

Each

use

or20

Hrs. months

or or

100

Hrs.

50

Hrs.

0

0 0

0

0 0

0

0(1)

0

OY:l

0

0(2)

Every 2years( change

if

necessary)

<225cc, Every 125hrs

~225cc,

Every250hrs (2)

(2) These items should be serviced

by

your

servicing dealer unless you have

the

proper

tools

and are mechanically proficient.

Refer

to

manual

for

service procedures.

elf

the

gasoline engine

frequently

work

underhigh temperature

or

heavyload,change

the

oil every

25

hours.

elf

the

engine

frequently

work

under

dusty

or

other

severe circumstances, clean

the

air

filter

elementevery

10

hours;

If

necessary, change

the

air

filter

elementevery

25

hours.

eThe maintenance period and

the

exact

time

(hour),

the

onewhich comes

first

should govern.

9 I

Maintenance

REFUELING

Fuel

tank

capacities:0.68gallons(2.6L)

With

the

enginestopped, remove

the

fuel

tank

cap andcheck

the

fuel level.Refill

the

tank

if

the

fuellevelislow.

Gasoline

is

highly

flammable

and

explosive.

You

can

be

burned

or

seriously

injured

when

handling

fuel.

•

Stop

the

engine

and

keep

heat,

sparks,

andflame

away.

•

Handle

fuel

only

outdoors.

• Wipe

up

spills

immediately.

MAXIMUM

FUEL

LEVEL

Refuel in awell-ventilated area before starting

the

engine.

If

the

engine

has

been running,allow

it

to

cool. Refuel carefully

to

avoid

spillingfuel.

Do

not

fill

above

the

fuel

strainer

shoulder.

After

refueling,tighten

the

fuel

tank

capsecurely.

Never refuel

the

engine insidea building

where

gasoline fumes

may reach flames

or

sparks. Keepgasolineaway

from

appliance

pilot

lights,barbecues,electricappliances,

power

tools,etc.

Spilled

fuel

is

not

only

a

fire

hazard,

it

causes

environmental

damage.

Wipe

up

spillsimmediately.

Fuel

can

damage

paintandplastic.

Be

careful

not

to

spill

fuel

when

(riling

your

fuel

tank.

Damage

caused

by

spilled

fuel

is

not

covered

under

waiTOnty.

FUEL

RECOMMENDATIONS

Use

unleaded

gasoline

with

a

pump

octane

rating

of

86

or

higher.

These engines

are

certified

to

operate

on unleaded gasoline.

Unleadedgasolineproduces

fewer

engineand sparkpiugdeposits

andextendsexhaustsystem life.

Never

use

stale

or

contaminated

gasoline

or

an

oil/gasoline

mixture.Avoidgetting

dirt

or

water

in

the

fueltank.

Occasionally

you

may hear a

light

"spark

knock"

or

"pinging"

(metallicrappingnoise) whileoperatingunderheavyloads. Thisis

no

cause

for

concern.

Gasoline Engine • Operator'sManual

If

spark knock

or

pingingoccurs

at

a steadyengine speed, under

normal load, change brands

of

gasoline.

If

spark knock

or

pinging

persists,seean authorizedservicingdealer.

Running the

engine

with persistentspark knock or

pinging

can

cause

engine

damage.

Running the

engine

with persistentspark knock or

pingingis considered

misuse,

andthe Distributor's

LimitedWarranty

does

not

cover

parts

damaged

by

misuse.

ENGINE

OIL

LEVEL

CHECK

Check

the

engine

oil

level

with

the

engine stopped and in a level

position.

1.

Remove

the

fillercap/dipstickand wipe

it

clean.

FILLERCAP/DIPSTICK

\ UPPER LIMIT

LOWER LIMIT

2. Insertand remove

the

dipstick

without

screwing

it

into

the

filler

neck.Check

the

oil levelshownon

the

dipstick.

3.

If

the

oil level islow,

fill

to

the

edge

of

the

oil

filler

hole

with

the

recommendedoil.

4. Screw

in

the

fillercap/dipsticksecurely.

Running the engine with a low oil level

can

cause

engine

damage.

The

OilAlertsystem (applicable

engine

types)

will

automatiwllystap

the

engine

before

the

oil

level

fa/Is

below

safe

limit

However,

toavoid the

inconvenience

of

an

unexpected

shutdown,

always

check

the

engine

oil

level

before

startup.

ENGINE

OIL

CHANGE

Drain

the

used

oil

while

the

engine is

warm.

Warm

oil

drains

quicklyandcompletely.

1. Place a

suitable

container

below

the

engine

to

catch

the

usedoil,and then remove

the

filler

cap/dipstickand

the

drain

plug.

2.

Allow

theused oil

to

draincompletely,andthen reinstall

the

drain plug, and tighten

it

securely.

Maintenance

I

10

Please

dispose

of

used

motoroil in

an

environmental friendly

way.

We

suggestyoutake

used

oil ina

sealed

container

to

your

local recyclingcenter

or

service station

for

reclamation. Do

not

throw

it

inthetrash;pour

it

ontheground;

or

downadrai

n.

3.

With

the

engine in a level position,

fill

to

the

outer

edge

of

theoil fillerhole

with

the recommended oil.

Engine oilcapacities: 16.9

oz.(O

.

SL)

Running

the

engine

with

a

low

oil

level can cause engine

damage.

The

Oil

Alert

system

(applicable

engine

types)

will

automaticallystop

the

engine before

the

oil level falls below

thesafelimit.

However,

to

avoid

the

inconvenience

of

an

unexpected

shutdown,

fill

to

the

upper

limit,

and check

the

oil

level

regularly.

4. Screwin

the

fillercap/dipsticksecurely.

-

""

OIL

LEVEL

DRAIN BOLT

ENGINE

OILRECOMMENDATIONS

Oil

is a major

factor

affecting performance and service life. Use

4-strokeautomotiveengine oil.

SAE

10W-30

is recommended

for

general

use.

Other

viscosities

shown in

the

chartmaybe used whentheaveragetemperaturein

your

area

is

within

the

recommended range.

The

SAE

oilviscosityand service classification are in

the

API label

on

the

oil container.

We

recommend

that

you use API

SERVICE

Category

SE

or

SF

oil.

SAEViscosity Grades

-20

-1

0 0 10 20

AMBIENT TEMPERATURE

11

I Maintenance

AIR

FILTER

INSPECTION

Remove

the

air

cleaner cover and inspect

the

fi

lter. Clean

or

replace

dirty

filter

elements. Always replace damaged

filter

elements.

If

equipped

with

an oil-bath aircleaner, also check

the

oil

level.

AIR

CLEANER

SERVICE

A

dirty

air

filter

will

restrict air

flow

to

the

carburetor, reducing

engine performance.

If

you operate

the

engine in

very

dustyareas, clean

the

air

filter

moreoftenthanspecified in

the

MAINTENANCESCHEDULE.

Operatingthe

engine

withoutan airfilter,

or

with a

damaged

air

filter,

will allowdirt

to

enterthe

engine,

causing

rapid

engine

wear.

This

type

of

damage

is

not

covered

by

the

Distributor'sLimitedWarranty.

1. Remove

the

aircleanercover.

2. Remove

the

foam

filter.

3.

Inspect

air

fi

lter

elements, and replace

them

if

they

are

damaged. Always replace

the

paper air

filter

elementat

the

scheduled interval.

4. Clean

the

air

filter

elements

if

they

are

to

be reused.

5. Foam

air

filter

element: Clean in

warm

soapy

water

, rinse,

and

allow

drying

thoroughly.

Or

clean

in

nonflammable

solvent

and

allow

drying.

Dip

the

fi

l

ter

element

in clean

engineoil,

and

thensqueeze

out

all

excess

oil.Theengine

will

smokewhenstarted if

too

muchoil is

left

inthefoam.

6.

Wipe

dirt

from

the

inside

of

the

air

cleaner base and cover,

using a moi

st

rag. Be careful

to

prevent

dirt

from

entering

the

air

duct

that

leads

to

the

carburetor.

7. Reinstall

the

cleaned airfilter. Be sure the gasket is in place

beneath

the

airfilter.Tighten

the

air

filter

wing

nut

securely.

SEDIMENT

CUP

CLEANING

1. Move

the

fuel valve

to

the

OFF position, and

then

remove

thefuel sedimentcup

and

0-ring.

Gasoline

ishighly

flammable

and

explos

i

ve

.

You

can

be

burned

or

seriously

injured

when

handling

fuel

.

•

Keep

heat,

sparks

and

flame

away.

•

Handle

fuel

only

outdoors

.

e

Wipe

up

spills

immediately.

2.

Wash thesedimentcup and

0-ring

in

nonflammablesolvent,

and

dry

themthoroughly.

3.

Place

the

0-ring

in

the fuel valve, and install

the

sediment

cup.Tightenthesedimentcupsecurely.

4. Move thefuel valve

to

theON position, and check

for

leaks.

Replace the

0-ring

ifthere

is

any leakage.

0-RING

SEDIMENTCAP

SPARK

PLUG

SERVICE

Recommended spark plugs:

F7RTC

or

otherequivalents.

~

An

incorrect

spark

plug

can

cause

engine

damage.

1. Disconnect the spark plug cap, and remove any

dirt

from

aroundthesparkplugarea.

2.

Remove

thesparkplug

with

asparkplugwrench.

3. Inspect thesparkplug. Replace

it

if

theelectrodesare worn,

or

if

theinsulator

is

cracked

or

chipped.

4. Measurethesparkplugelectrodegap

with

asuitable

gauge.

The gap should be 0.028

in

-0.031

in

(0.70

mm-

0.80 mm).

Correct

the

gap,

if

necessary, bycarefully bending theside

electrode.

Gasoline Engine » Operator'sManual

5.

Install

the

spark plug carefully,

by

hand,

to

avoid cross-

threading.

6.

After

thespark plugseats, tighten

with

aspark plugwrench

to

compressthewater.

A

loose

spark plug

can

overheat and

damage

the

ensine.

Over

tightening

the

spark

plug

can

damage

the

threads

in

the

cylinder

head.

7.

Attachthesparkplug

cap.

IDLE

SPEED

ADJUSTMENT

1.

Start

the

engine

outdoors,

and

allow

it

to

warm

up

to

operatingtemperature.

2.

Movethe

throttle

lever

to

itsslowestposition.

3.

Turn

the

throttle

stop screw

to

obtain

the

standard idle

speed.

Standardidlespeed: 1800±150rpm

SPARK

ARRESTER

SERVICE

(optionalequipment)

Your engine is

not

factory-equipped

with

a spark arrester. In

some areas,

it

is illegal

to

operate an engine

without

a spark

arrester.Check local laws and regulations. A spark arrester is

availablefromauthorized servicingdealers.

The sparkarrestermust

be

serviced every

100

hours

to

keep

it

functioning

as

designed.

lfthe

engine

has

been running,

the

mufflerwill beveryhot.

Allow

the muffler

to

cool beforeservicingthesparkarrester.

1.

Remove

thethree4

mm

screws from theexhaust deflector,

and removethedeflector.

2.

Remove

the

four

5

mm

screws from

the

muffler

protector

and removethemufflerprotector.

Maintenance

I

12

3.

Remove

the

4 mm

screw

from

the

spark

arrester,

and

remove thespark arresterfrom the muffler.

MUFFLER

PROTECTOR

MUFFLER

Bmm NUTS

SCREEN

4. Use a brush

to

remove carbon deposits

from

the

spark

arresterscreen.

Be

careful

to

avoid damagingthe screen.

The spark arrester must

be

free

of

breaks

and

holes. Replace

thespark arrester

if

it

is

damaged.

5.

Install

the

spark arrester,

muffler

protector, and exhaust

deflectorin the reverse order

of

disassembly.

Never

use

an

engine

without

an

appropriate spark

arrester

in

the

forest

areas!

Doing

so

may

cause

afire!

13

I Maintenance

Gasoline Engine » Operator's Manual

STORAGE/

TRANSPORT!

NG

STORAGE

PREPARATION

Proper storage preparation

is

essential

for

keeping your engine

trouble free

and

looking good. The following steps

will

help

to

keep rust

and

corrosion from impairing your engine's function

and appearance, and

will

make

the

engine easier

to

start

after

storage.

CLEANING

If

the engine

has

been

running, allow

it

to

cool

for

at least half

an

hour before cleaning. Clean all exterior surfaces, touch up any

damaged paint,

and

coat

other

areas

that

may rust

with

a light

film

of

oil.

FUEL

e

Using

a

garden

hose

or

pressure

washing

equipment

can

force water into the

air

cleaner or muffler

opening.

Water

in

the aircleaner will

soak

the air

filter,

and

water that

passes

through

the

airfilter or

muffler

can

enter

the

cylinder,

causing

damage.

e Water contacting a hot

engine

can

cause

damage.

If

the

engine

has

been

running,

allow

it

to

cool

for at

least

half

an

hour

before

washing.

Gasoline will oxidize

and

deteriorate in storage. Old gasoline will

cause

hard starting,

and

it

leaves gum deposits

that

clog the fuel

system. Ifthegasoline in yourengine deterioratesduringstorage,

you may need

to

have

the

carburetor

and

other

fuel system

components serviced

or

replaced.

The Distributor's Limited Warranty does

not

cover fuel system

damage

or

engine

performance

problems

resulting

from

neglected storage preparation.

You

can

extend fuel storage life by adding afuel stabilizer that

is

formulated

for

that purpose,

or

you

can

avoid fuel deterioration

problems by drainingthefuel tank

and

carburetor.

ADDING A

FUEL

STABILIZER

TO

EXTEND

FUEL

STORAGE

LIFE

When

adding

a

fuel

stabilizer,

fill

the

fuel

tank

with

fresh

gasoline.

If

only partially filled, air in the tank will promote fuel

deterioration during storage.

If

you keep a container

of

gasoline

for

refueling,

be

sure that

it

contains onlyfresh gasoline.

1.

Add fuel stabilizerfollowingthe manufacturer's instructions.

2.

After

adding afuel stabilizer, run the engine outdoors

for

10

minutes

to

be

sure

that

treated gasoline

has

replaced the

untreatedgasoline in thecarburetor.

3. Stop theengine,

and

move thefuel valve

to

the

OFF

position.

DRAINING

THE

FUEL

TANKAND

CARBURETOR

1.

Place

an

approved gasoline container below the carburetor,

and

use

afunnel

to

avoid spillingfuel.

2.

Remove

the

carburetor

drain

bolt

and sediment cup, and

then move thefuel valve lever

to

the ON position.

3.

FUEL

VALVE

LEVER

WASHER

After

all

the

fuel

has

drain

into

the container, reinstall the

drain bolt

and

sediment

cup.

Tighten them securely.

e

The

length

of

time that

gasoline

can

be

left

in

your

fuel

tank

and

carburetor without

causing

functional

problems will vary with

such

factors

as

gasoline

blend,

your

storage

temperatures,

and

whether

the

fuel

tank

is

partially

or

completely

filled.

The

air

in

a

partiallyfilled

fuel

tank

promotes

fuel

deterioration.

Very

warm storage temperatures accelerate fuel

deterioration.

Gasoline

will

oxidize

and

deteriorate

in

storage.

Deteriorated gasoline will

cause

hard

starting, and

it

leaves

gum

deposits that clog the

fuel

system.

As

a

result,

If

the

engine

is

not

used

for

more

than

one

month,

the

fuel

oil shall

be

drained

thoroughly to

prevent

from

deterioration

of

the

fuel

in

fuel

system

and

carburetor.

e

The

failures

of

fuel

system

or

engine

performance

arising

from

improper

storage

are

beyond

the

scope

of

the

warranty.

Storage

&Transporting I

14

STORAGE

PRECAUTIONS

1.

Change the engine oil.

2.

Remove

thespark plugs.

3.

Pour a tablespoon

(5-10

cc)

of

clean engine oil

into

the

cylinder.

4.

Pull the starter rope several times

to

distributethe oil in the

cylinder.

5.

Reinstall thespark

plugs.

6.

Pull

the

starter

rope

slowly

until

resistance is

felt.

This

will

close

the

valves

so

moisture cannot

enter

the

engine

cylinder. Return the starterrope gently.

If

your engine

will

be

stored

with

gasoline in the fuel tank

and

carburetor,

it

is

important

to

reduce

the

hazard

of

gasoline

vapor ignition. Select awell-ventilated storage area away from

any appliance

that

operates

with

a flame, such

as

a furnace,

water heater, or clothes dryer. Also avoid any area with a spark-

producingelectricmotor,

or

where powertools are operated.

If

possible, avoid storage areas

with

high humidity, because

that

promotes rust

and

corrosion.

Unless all fuel

has

been

drained from the fuel tank, leave the fuel

valve lever in the OFF position

to

reduce the possibility

of

fuel

leakage.

Position the equipment

so

the engine

is

level. Tilting

can

cause

fuel

or

oil leakage.

15 I

Storage

&

Transproting

With

the

engine

and

exhaust system cool, cover

the

engine

to

keep

out

dust. A

hot

engine and exhaust system

can

ignite

or

melt some materials. Do not

use

sheet plastic

as

a dust cover. A

nonporous coverwill trapmoisture around theengine, promoting

rust

and

corrosion.

If

equipped

with

a battery

for

an

electric starter, recharge

the

batteryonce amonth whilethe engine

is

in storage. This will help

to

extend theservice life

of

thebattery.

REMOVAL

FROM

STORAGE

Check your engine

as

described in the chapter CHECK

BEFORE

OPERATION.

If

the fuel was drained during storage preparation, fill the tank

with

fresh gasoline.

If

you keep a

container

of

gasoline

for

refueling,

be

sure

that

it

contains only fresh gasoline. Gasoline

oxidizes

and

deterioratesover time, causing hard starting.

If

the cylinders were coated with oil duringstorage preparation,

theengine maysmoke brieflyatstartup.This

is

normal.

TRANSPORTING

If

the

engine

has

been running, allow

it

to

cool

for

at least 15

minutes before loading

the

engine-powered equipment on

the

transport vehicle. A hot engine

and

exhaust system

can

burn you

and

can

ignitesome materials.

Keep

the engine level when transporting

to

reduce the possibility

of

fuel leakage. Movethefuel valve lever

to

the

OFF

position.

Gasoline Engine » Operator's Manual

TROUBLESHOOTING

Start

Engine

Difficultly

(By

usingrecoil

starter)

TROUBLE CAUSE REMEDY

Fuel supply

is

not

smooth

or

nofuel supply

1.

There

is

no enough fuel infuel

tank

and fuel 1. Fill fuel, open fuel cock.

E cock

is

closed.

2.

Dredge airvent.

Q)

2.

Air

vent

in

the

fuel

filler

cap

is

clogged 3. Clean

first

and then dredge

......

~

V'l

3.

Fuel cock

is

clogged 4. Readjust

or

clean, blow

to

getthrough

....

a:;

ra

::I

a.

-4. Improper

or

clogged main oil

flow

hole

5.

Dismantle needlevalve and repair, clean,

V'l

Q)

bO

.s::.

::I

......

5.

Needlevalve is

not

closed properly

or

start

blow

to

get

through

a.

.s::.

......

~

"3:

hole

is

clogged 6. Repair

float

....

ra

a.

bO

V'l c

6.

Float

is

damaged

or

sticking

"iii

0

....

E

==

....

bO

c 0 c Fuel supply

is

normal 1. Replace

0 z

:c

"iii

......

V'l

Q)

1.

Fuel

is

too

filthy

or

deterioratd

2.

Replace

Q)

E

....

a. 0

E

V)

2.

There

is

water

infuel

3.

Drainextra fuel, diyupsparkplugelectrodes

0

u

3.

Too muchfuel in engine 4. Select properfuel brand corresponding

....

Q)

"'C

with

the

requirements..!: 4.

Wrong

fuel brand

~

"iii

c Spark plug

is

in bad conditions

E 0

....

"iii

0

1.

Too much carbon depositand

dirt

aroundz c 1. Clearaway.

Q)~

......

....

J

ra

electrodes

E

.s::.

a.

2.

Replace sparkplug.

Q)

•

!!!!

V'l

......

.s::.

Q)

2.

Electrodes are birni damaged seriously

or

~

- c 3. Adjust

to

propervalue.

ra

·-

insulatorsdamaged.

V'l

E-

>-

....

a. 0

a.

z

3.

Improperelectrodesgap.

::I

V'l

a:;

::I

Q)

Normal sparkplug

-

"iii

.!:

1. Replace

E

c~

1.

High tension line

is

damaged.

....

0

....

2.

Replace

0

"iii

ra

z a.

2.

Ignition coil

is

damaged

c V'l

Q)

3. Replace

......

0

J c

3.

Magneto loses magnetism

.s::.

bO

4. Adjustgap between ignition and flywheel

:C

4. Wronggap between ignitioncoil

and

flywheel

1. Replace

c

1.

Piston ring

is

worn

to

or

even over its

wear

2.

Replace

0

"iii

E

limit

3. Clear upcarbon fouling

V'l

Q)

......

....

V'l

bO

2.

Piston ring

is

broken

a.

>-

::I

4. Tighten

with

agasket in

E V'l a.

0

>-

3.

Piston ring

is

sticking

u a.

~

5.

Checkcylindergasket,

and

theflatness

....

a.

ra

Q)

::I a. 4. Spark plug

is

not

installed tighten

or

"'C V'l V'l

of

thesurface bywhich cylinderblock

c

a:;

"iii

> ::I E

without

agasket contacting

with

cylinder

head

u -

....

"iii

0

5.

Air

leakage between cylinder blockand Tighten cylinderhead bolts in stipulated

E E z

....

cylinder head

0 0

order

to

stipulated torque.

c z

..c

6.

Air

leakage in

the

valves 6. Checkvalve. Clearance and tightness,

<(

repair

if

necessary.

16

Gasoling

Engine

Power

Output

Insufficiency

TROUBLE

CAUSE

REMEDY

Fuel supplysystem

1.

Air

in fuel line

or

fuel lineclogged

2.

Mainoil

flow

hole

is

not

adjusted properly

1.

Exhaust air

or

dredgefuel line

3. In carburetor, needlevalve hole and main

2.

Readjust

oil

flow

hole clogged

3.

Clean and

biow

to

get

through

4. Fuel cock

is

clogged up 4. Clean, replace damaged

part

5.

Too much carbon deposit in combusting

5.

Clear away

chamber

6.

Clear away

When increasing 6. Too much car bon fouling in

muffler

and

throttle,

speed

7.

Clean aircleaner

filter

element

increaseslow

or

even exhaust pipe. 8. Repair

or

replace

decrease and stop 7.

Air

cleaner

is

clogged up

running 8. Intake pipe is leaking

Poorcompression

1. Piston

or

cylinder

or

piston ringis

worn

1.

Replace

the

worn

2.

Air

leakage

from

the

surface by which

2.

Replace

the

cylindergasket

cylinder block contacting

with

cylinder

3.

Readjust

head.

3. Too big

or

too

small valveclearance 4. Repair

4. Valve tightness

is

poor

Gasoline

Engine

Gan

not

Running

Smoothly

TROUBLE

CAUSE

REMEDY

1. Piston, cylinder

or

piston ring

is

worn

excessively

1.

Replace

the

worn

2.

Piston pin and piston pin hole are won

2.

Replace piston

or

piston pin

Knockingsound excessive

3. Tie rod small head

is

worn

excessively

3.

Replace

tie

rod

4. Roller bearing

for

crankshaftmain shaft

is

4. Replace roller bearing

worn

1. Engine

is

too

hot

2.

Too much carbon deposit in combustion

1.

Shoot

trouble

Abnormal

combustion chamber

2.

Clear away

3. Impropergasoline brand

or

low

gasoline

3.

Replace

with

qualified gasoline

quality

1. There

is

water

in

float

chamber

1.

Clean

Spark lacking

2.

Improperspark plug electrodes clearance

2.

Adjust

3. Somethingwrong

with

induced coil,

and

so

on

3.

Checkand replace damaged parts

17 I

Troubleshooting

Gasoline Engine » Operator's Manual

Stop

Suddenly

When

Running

TROUBLE CAUSE REMEDY

Fuel

supplysystem

1.

Refill fue

1. Fuel

is

finished

2.

Checkfuel line and dredge

2.

Carburetor

is

clogged

3.

Repair

3.

Floatchamber

is

leaking 4. Dismantle

float

chamber and eliminate

4. Needlevalye

is

sticked

it

Ignitionsystem

Stopsuddenlywhen 1. Spark plug

is

punctured,

or

short-circuited

1.

Replace spark plug

running bycarbon deposit

2.

Replace spark plug

2.

Side electrode

of

spark plug

is

dropped

out

3.

Weldon

3.

High-tension

wire

is

dropped

out

4. Replace ignition coil

4. Ignitioncoil

is

punctured

or

short-circuited

5.

Find

out

meeting and insulate

5.

Parking

wire

is

located on engine body

The

other

1. Cylinderis seriouslyscored and valve

1.

Repair

or

replace damaged parts

dropped

out

Gasoline Engine Is

Overheat

TROUBLE CAUSE REMEDY

1. Oil insufficient

or

wrong

oil ratioin the

gasoline

2.

Exhaust pipe blocked up

1.

Refill engine oil

3.

Shroud leaking

2.

Clean exhaust pipe

4. Coolingfins blocked byforeign

matter

3.

Repair damaged

part

5.

Coolingfan loosen and misfunction 4. Clearcoolingfins

Gasoline engine

is

6.

Connection rod deformation

to

make

5.

Reinstall well

overheat piston and cylinder bushingsidewear

6.

Replace connection rod

7.

Cylinder

or

piston

or

piston ring

is

worn

7.

Replace thewon parts

to

make huntingbetween cylinderand

crankcase

8.

Readjust enginegovernor

8.

Improperadjustment

of

enginegovernor

to

9.

Replace main bearing

produce speed high

9.

Crankshaft main bearing

burnt

out

Troubleshooting

I 18

Abnommal

NoiseExist

When

EngineRunning

TROUBLE CAUSE REMEDY

1. Piston, piston ring

or

cylinder

is

worn

1.

Replace the

worn

part

2.

Connection rod

or

piston pin and piston pin

2.

Replace the

worn

part

Beatingsound hole are

worn

3.

Replace bearing

3.

Crankshaft main neckis

worn

4. Piston ring

is

broken 4. Replace piston ring

1. Too much carbon deposit in combusting

1.

Clear awaycarbon deposit

chamber

Metal beatingsound

2.

Too small electrode clearance

of

spark plug

2.

Adjustelectrodeclearance properly

3.

Check relative parts such

as

carburetor

when abnormal

3.

Engine fuel

is

too

much 4. Replace fuel

combustion occurs 4. Improperfuel brand

5.

Engine

is

overheat

5.

Find acause and eliminate

it

1. Impropervalve clearance

1.

Readjustvalve clearance properly

The

other

2.

Flywheel

is

not

connected

with

crankshaft

2.

Connect

tightly

19 I

Troubleshooting

YARDMAX R210-S User manual

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