DR RV170 Quick start guide
2DR® VERTICAL SHAFT ENGINE
This indicates a hazardous situation, which, if not followed, could result in death or serious injury.
Table of Contents
Chapter 1: General Safety Rules............................................................................................................................................................ 3
Chapter 2: Setting Up The DR VERTICAL SHAFT ENGINE................................................................................................................. 6
Chapter 3: Operating the DR VERTICAL SHAFT ENGINE .................................................................................................................. 9
Chapter 4: Maintaining the Exhaust Control System ........................................................................................................................... 10
Chapter 5: General Maintenance .......................................................................................................................................................... 11
Chapter 6: Transport And Storage ........................................................................................................................................................ 15
Chapter 7: Troubleshooting .................................................................................................................................................................. 16
Conventions used in this manual
Additional Information and Potential Changes
DR Power Equipment 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 Engine.
This indicates a hazardous situation, which, if not avoided, could result in minor or moderate injury.
This information is important in the proper use of your machine. Failure to follow this instruction could result in damage to your
machine or property.
This indicates a hazardous situation, which, if not followed, will result in death or serious injury.
CONTACT US AT www.DRpower.com 3
Chapter 1: General Safety Rules
Labels
Your DR VERTICAL SHAFT ENGINE carries prominent labels as reminders for its proper and safe use. Shown below are
copies of all the Safety and Information labels that appear on the equipment. Take a moment to study them and make a note
of their location on your VERTICAL SHAFT ENGINE as you set up and before you operate the unit. Replace damaged or
missing safety and information labels immediately.
Read this safety & operating Instructions manual before you use the DR VERTICAL SHAFT ENGINE. Become familiar with the
operation and service recommendations to ensure the best performance from your Engine. If you have any questions or need
assistance, please contact us at www.DRpower.com or call toll-free 1-800-DR-OWNER (376-9637) and one of our Technical
Support Representatives will be happy to help you.
4DR® VERTICAL SHAFT ENGINE
Safety with Gasoline-Powered Engines
Gasoline is a highly flammable liquid. Gasoline also gives off flammable vapor that can be easily ignited and cause a fire or
explosion. Never overlook the hazards of gasoline. Always follow these precautions:
•Never run the Engine in an enclosed area or without proper ventilation as the exhaust from the Engine contains carbon
monoxide, which is an odorless, tasteless, and deadly poisonous gas.
•Store all fuel and Oil in containers specifically designed and approved for this purpose and keep away from heat and open
flame, and out of the reach of children.
•Fill the gasoline tank outdoors with the Engine off and allow the Engine to cool completely. Do not handle gasoline if you or
anyone nearby is smoking or if you are near anything that could cause it to ignite or explode. Replace the fuel tank and fuel
container caps securely.
•If you spill gasoline, do not attempt to start the Engine. Move the machine away from the area of the spill and avoid creating
any source of ignition until the gas vapors have dissipated. Wipe up any spilled fuel to prevent a fire hazard and properly
dispose of the waste.
•Allow the Engine to cool completely before storing the DR VERTICAL SHAFT ENGINE in any enclosure. Never store the
machine with gas in the tank or a fuel container near an open flame or spark, such as a water heater.
•Never make adjustments or repairs with the Engine running. Disconnect the Spark Plug wire and keep the wire away from the
Spark Plug to prevent accidental starting.
•Never check for an ignition spark with the Spark Plug or Spark Plug wire removed. Use an approved spark tester.
•Never tamper with safety devices. Check their proper operation regularly.
•Do not change the Engine governor settings or modify the Engine speed. Modifications will void your warranty.
•To reduce fire hazard, keep the Engine cooling fan and muffler area free of debris build-up such as leaves, grass, Oil, grease or
any other combustible material.
•Never operate the Engine without the muffler. Inspect the muffler periodically and replace if necessary. If equipped with a
muffler deflector, inspect the deflector periodically and replace if necessary.
•Never operate the Engine with the air cleaner or cover over the carburetor air intake removed, except for adjustment.
Removal of such parts could create a fire hazard. Do not use flammable solutions to clean air filter.
•Check fuel lines and fittings frequently for cracks or leaks, replace if necessary.
•Replace rubber fuel lines and grommets when worn or damaged and after 5 years of use.
•The muffler and Engine become very hot and can cause severe burns. Do not touch a hot muffler or Engine.
•Set the Engine throttle according to the recommendation of the owner's manual. Do not overload the Engine or run it with
low load and at low speed for long periods.
•Use specified grade of gasoline. The fuel should be clean with no debris. Keep the fuel opening clean and change the Oil
periodically.
•Periodically check that the Engine mounting bolts are tight. Tighten as necessary.
•Periodically clean the air cleaner element and change it when necessary.
•The Engine is air-cooled. Clean the top of the Engine and cooling fins to ensure optimum air flow.
•The operator should be familiar with the working principle and structure of the gasoline Engine, knowing how to make an
emergency stop and be familiar with using the controls. Anyone without training is forbidden to operate the Engine. Keep
periodical maintenance. Solve problems immediately. Do not run the Engine if it not operating properly.
CONTACT US AT www.DRpower.com 5
A Note to All Users
No list of warnings and cautions can be all-inclusive. If situations occur that are not covered by this manual, the operator
must apply common sense and operate this DR®VERTICAL SHAFT ENGINE in a safe manner. Contact us at
www.DRpower.com or call 1-800-DR-OWNER (376-9637) for assistance.
Additional Information and Potential Changes
DR Power Equipment 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 machine.
6DR® VERTICAL SHAFT ENGINE
Figure 1
Chapter 2: Setting Up The DR VERTICAL SHAFT ENGINE
It may be helpful to familiarize yourself with the controls and features of your DR VERTICAL SHAFT ENGINE as shown in
Figure 1 before beginning these procedures. If you have any questions at all, please feel free to contact us at
www.DRpower.com.
DR VERTICAL SHAFT ENGINE Controls and Features
Carburetor
Oil Fill/Dipstick
Muffler
Spark Plug
Air Cleaner
Fuel Fill Cap
Pull Start Handle
Model Number and
Serial Number
Off/On/Start Switch (E/S)
Off/On Switch (M/S)
Fuel Tank
Choke Lever
CONTACT US AT www.DRpower.com 7
Engine Oil
Engine Oil is a key factor in deciding the Engine’s performance. Do not use
Engine Oils with additives or 2-stroke Engine Oil because they will not provide
enough lubrication and may shorten the Engines service life.
Engine Oil capacity: 0.6L / 20 oz.
Engine Oil recommended: SAE10W-30, SAE30
As viscosity varies with regions and temperatures, SJ class Oil is recommended
(Figure 2).
Checking the Oil level:
1)
Remove the dipstick (Figure 3) and clean it with a rag.
2)
Reinsert the dipstick into the Oil Fill hole. Remove the dipstick and check
Oil level (Figure 3).
3)
If the Oil level is low, add the recommended Engine Oil up to the full level
on the dipstick.
4)
Reinstall the dipstick when the correct Oil level is reached.
Engine Oil change:
Note: We Recommend using a small Engine Oil extractor to extract the used Engine
Oil. Always drain the Engine Oil when the Engine is warm so it will flow more
rapidly and completely.
1)
Remove the Oil Dipstick (Figure 3)
2)
Extract the Oil following the Extractor Instructions.
3)
Fill With the recommended Engine Oil and check Oil level with dipstick
(Figure 4).
4)
When finished, reinstall the Oil dipstick and tighten it securely
Air Cleaner
Oil Dipstick
Figure 3
Oil Fill/Drain Hole
Upper Mark
Figure 4
Lower Mark
•Used engine oil may cause skin cancer if repeatedly left in contact with
the skin for prolonged periods. It is advisable to thoroughly wash your
hands with soap and water as soon as possible after handling used oil.
Please dispose of used engine oil in a manner that is compatible with the
environment.
•The engine must be level before checking the oil to get an accurate
reading on the dipstick
Figure 2
•Prevent any debris from entering the engine when the air cleaner is
removed, or the engine could be damaged.
•Never run the engine without an air cleaner, or severe damage may result.
8DR® VERTICAL SHAFT ENGINE
1)
Remove the Air Cleaner Cover (Figure 5).
2)
Remove the Air Filter (foam element or paper element).
3)
Check and clean Air Cleaner parts.
4)
Replace any damaged Air Cleaner parts.
5)
Reinstall the Air Filter and Cover.
Fuel Check
Fuel tank capacity: 1.0L / 34oz.
1)
Remove the fuel fill cap and check fuel level.
2)
If the level is low, fill the gas tank with fresh, unleaded gas to
approximately 1" to 1-1/2" below the top of the fill neck to allow for
fuel expansion (Figure 6). Be careful not to overfill.
3)
Reinstall the fuel fill cap before starting the Engine.
•Gasoline is extremely flammable and is explosive under certain
conditions.
•Refuel in a well-ventilation area with the Engine stopped. Do not smoke
or allow flames or sparks in the area where gasoline is stored or where
the fuel tank is refueled.
•Do not overfill the fuel tank (there should be no fuel in the filling neck).
After refueling, make sure the fuel tank cap is installed securely.
•Be careful not to spill fuel when refueling. Spilled fuel or fuel vapor may
ignite. If any fuel is spilled, make sure the area is dry before starting the
Engine.
•Avoid repeated or prolonged contact with skin or breathing of fuel vapor.
Keep out of reach of children.
•Only use unleaded gasoline and recommend gasoline grade 90 octane or
over. Unleaded gasoline can reduce gasoline Engine carbon deposit and
prolong the exhaust system service life.
•Never use contaminated gasoline or mixed gasoline with Oil. Don’t allow
dust, foreign matter, or water to enter fuel tank.
•Fuel may damage paint and plastic. Be careful not to spill fuel when
refueling. Any damage due to spilling is not covered under warranty.
•If a "Light knocking" or "spark exploding" sound can be heard when the
Engine is overloaded, it is normal, and you do not need to be concerned.
•If a " knocking" or "spark exploding" sound occurs at a steady speed
under normal load, change brand of gasoline. if the sound doesn’t
disappear, consult your dealer for help, otherwise the Engine may be
damaged.
•If you continue to operate the Engine with "Knocking" or "spark
exploding" sounds it is not covered under warranty.
Figure 6
Fuel Upper Level
Fuel Tank
Fuel
Air Filter
Figure 5
Air Filter Cover
CONTACT US AT www.DRpower.com 9
Chapter 3: Operating the DR VERTICAL SHAFT ENGINE
Starting the Engine
Note: For ease of operation and starting, the DR VERTICAL SHAFT ENGINE is
equipped with a fixed speed Throttle Control.
RV170 M/S With Off/On Switch
1)
Press the Engine Off/On switch to the “ON” position (Figure 7).
2)
Gently push the Choke Lever Inward.
3)
Pull the Starter Grip lightly until resistance is felt, then, briskly pull to start
the Engine (Figure 8). Lightly return the Starter Grip once the Engine starts.
4)
Adjust the Choke until the Engine runs smoother by pulling outward on the
Choke Lever.
RV170 E/S With Off/On/Start Switch
1)
Press the Engine Off/On/Start switch to the “On” position (Figure 9).
2)
Gently Push the Choke Lever Inward.
3)
Press and hold the Switch in the “Start”position until the Engine starts
4)
Adjust the Choke until the Engine runs smoother by pulling outward on the
Choke Lever.
Stopping the Engine
RV170 M/S With Off/On Switch
1)
Press the Engine Off/On switch to the “Off” position (Figure 7).
RV170 E/S With Off/On/Start Switch:
2)
Press the Engine Off/On/Start switch to the “Off” position (Figure 9).
Don’t allow the starter grip to snap back against the Engine. Return it gently
to prevent damage to the starter.
Suddenly stopping the Engine at high speed under heavy load could damage
the Engine.
Choke Lever
Off
On
Figure 7
Off/On Switch
Figure 8
Starter Grip
Choke Lever
Start
Off
Figure 9
Off/On/Start Switch
On
10 DR® VERTICAL SHAFT ENGINE
Chapter 4: Maintaining the Exhaust Control System
Exhaust Control System Service
With the Engine running, carbon monoxide, oxide of nitrogen and hydrocarbon will be produced. In certain conditions, oxide
of nitrogen and hydrocarbon will react chemically with each other to make carbon monoxide and is toxic. Exhaust control is
therefore very important. We decrease the exhaust emissions by introducing poor-fuel carburetors and other devices into the
Engine to solve the problem. To keep the exhaust of your Engine within the standard exhaust emission, pay attention to the
following:
Maintenance
Maintain the Engine periodically in accordance with the maintenance schedule in the manual. The maintenance schedule is
made out on the base of normal use in normal conditions. If using under heavy load, dusty or wet circumstances or in high
temperature, service of the Engine should be done more often.
Replacing Parts
To ensure the best quality and reliability, use only new genuine DR Power Equipment parts or their equivalents for repair and
replacement.
Tampering and Altering
Tampering with or altering the emission control system may increase emissions beyond the legal limit. Among those acts that
constitute tampering are:
•Removal or alteration of any part of the intake, fuel, or exhaust systems.
•Altering or defeating the governor linkage or speed-adjusting mechanism to cause the Engine to operate outside its design
parameters.
Problems Affecting Exhaust Emissions
•Difficult starting or difficult stopping.
•Unstable idle speed.
•Give off black smoke or consume too much fuel.
•Poor ignition spark or spark knock.
•Too early ignition.
CONTACT US AT www.DRpower.com 11
Please dispose of used Engine Oil and the Oil containers in a manner that is compatible with the environment. We suggest you
take used Oil in a sealed container to your local recycling center or service station for reclamation. Do not throw it in the trash or
pour it on the ground or down a drain.
Stop the Engine before servicing. Put the Engine on a level surface and remove the Spark Plug cap to avoid starting.
Never run your Engine in a poorly ventilated area. Be sure to keep good ventilation in working area. The exhaust from the Engine
may contain poisonous carbon monoxide, breathing it would cause shock, unconsciousness and even death.
Chapter 5: General Maintenance
Maintenance Schedule for Vertical Engine
Proper maintenance is essential for safe, economical, and trouble-free operation. It also helps reduce air pollution. In order to
keep your gasoline Engine in good working condition, it must be periodically serviced. The following maintenance schedule
and routine inspection procedures must be carefully followed.
Procedure
Before
Each Use
First Month or 10
hrs of operation
Thereafter, every 3 months
or 30hrs of operation
Every 6 months or
50 hrs of operation
Every year or 100
hrs of operation
Check/Refill Engine Oil Level
▲
Change Engine Oil
▲
▲
Check Air Filter
▲
Clean Air Filter
▲
Change Air Filter
▲
Clean/Adjust Spark Plug *
▲
Clean Spark Arrestor
▲
Check/Adjust Valve Clearance **
▲
Check Fuel Line
Every 2 years (change if necessary)
Remove Carbon Deposits on Cylinder
Head and piston **
Every 125 hours
* These items should be replaced by new ones if necessary.
** These items should be serviced by a mechanically proficient person or by our authorized servicing dealer.
Replacing Engine Oil
Note: We Recommend using a small Engine Oil extractor to extract the used Engine Oil. Always drain the Engine Oil when the
Engine is warm so it will flow more rapidly and completely.
1)
Remove the Oil Dipstick (Figure 3)
2)
Extract the Oil following the Extractor manufactures Instructions.
3)
Fill With the recommended Engine Oil and check Oil level with Dipstick (Figure 4).
4)
When finished, reinstall the Oil Dipstick and tighten it securely.
•If you frequently operate your gasoline Engine under high-load or high-temperature conditions, change the Engine Oil every
10 hours of operation.
•If your gasoline Engine frequently works under dusty or severe conditions, clean the air filter element every 10 hours of
operation. If necessary, change the element every 25 hours of operation.
12 DR® VERTICAL SHAFT ENGINE
Never clean the air cleaner element with gasoline or low flash-point detergents, or explosion may happen.
Maintenance of Air Cleaner
A dirty or damaged air cleaner will allow dust to enter into the Engine causing rapid Engine wear. Service the air cleaner as
recommended by the manufacturer.
1)
Remove the Air Filter Cover (Figure 10).
2)
Remove the air filter (foam element or paper element).
3)
Check and clean air cleaner parts.
4)
Replace any damaged air cleaner parts.
5)
Reinstall the air filter and cover
Maintenance of Spark Plug
In order to ensure the Engine will run normally, setting the gap of the Spark
Plug must be correct and no deposit around the Spark Plug.
Recommended Spark Plugs:
NGK:
BP6ES/BPR6ES
DENSO:
W20EPR-U
CHAMPION:
RN11YC4
TORCH:
F6TC/F6RTC
1)
Remove the Spark Plug cap.
2)
Clear away any dirt or debris around the Spark Plug base.
3)
Remove the Spark Plug with a Spark Plug wrench.
4)
Visually check the Spark Plug (Figure 11). Clean with a steel brush. If the
insulator is damaged, replace the Spark Plug.
5)
Measure the Spark Plug clearance with a feeler gauge. The clearance should be 0.7~0.8mm (.028"-.031"). If adjustment is
necessary, bend the side electrode carefully.
6)
To avoid cross-threading, first, screw in Spark Plug by hand, then tighten with a Spark Plug wrench to compress the
gasket.
Note: If a new Spark Plug is used, please replace it with same Spark Plug model.
7)
Turn a new Spark Plug 1/2 turn after the gasket is touching to compress the gasket.
8)
Turn a used Spark Plug 1/8-1/4 turns after the gasket is touching to compress the gasket.
If you use compressed air to clean the paper element, wear ear and eye protection to prevent injury.
Figure 11
0.7-0.8mm
(.028"-.031")
Allow the muffler to cool for at least 15 minutes before removing the Spark
Plug to prevent burn injuries.
Air Filter
Air Filter Cover
Air Filter Base
Base
Figure 10
CONTACT US AT www.DRpower.com 13
To prevent serious injury from fire, follow the kit procedures in a well-ventilated area away from ignition sources. If the Engine is
hot from use, shut the Engine off and wait for it to cool before proceeding.
Idle speed adjustment of the carburetor
1)
Start the Engine and preheat it to normal operating temperature.
2)
Adjust the throttle stopping screw to obtain minimum idle speed. Minimum idle speed:(1,900±300) r/min.
High Altitude Kit for EPAIII Engines
3000ft to 6000ft or 6000ft to 8000ft of elevation
At high altitude, the standard carburetor air-fuel mixture will be too rich. Performance will decrease and fuel consumption will
increase. A very rich mixture will also foul the Spark Plug and cause hard starting. Operation at an altitude that differs from
that at which this Engine was certified, for extended periods of time, may increase emissions.
The fuel system on this Engine or Equipment may be influenced by operation at higher altitudes. Proper operation can be
ensured by installing an altitude kit when required. See the table below to determine when an altitude kit is required.
Operating this Engine without the proper altitude kit installed may increase the Engine’s emissions and decrease fuel
economy and performance. Kits may be obtained from DR Power Equipment and should be installed by a qualified individual.
Fuel
Altitude Range*
Kit Part Number
Gasoline
0 –3000 ft
Not Required
3000 –6000 ft
Kit # A0002862422
6000 –8000 ft
Kit # A0002862423
Engine, Generator Set, Pressure Washer, Walk-Behind
Lawnmower,
Compressor,
Pump, Tiller
etc.
*Elevation above sea level.
•This high altitude jet is to be used at elevations above 3000 feet.
•At elevations above 8000 feet, the Engine may experience decreased performance, even with the high-altitude kit.
If a carburetor is replaced, the proper high altitude kit jet will need to be installed into the replacement carburetor.
•The Spark Plug must be tightened securely or it may become very hot and
damage the Engine.
•Only use recommended Spark Plug or the equivalent. Incorrect heat
range of the Spark Plug may damage the Engine.
The warranty may be void if necessary adjustments are not made for high altitude use by installing a high altitude kit.
14 DR® VERTICAL SHAFT ENGINE
CONTACT US AT www.DRpower.com 15
To avoid fuel spills during transporting, keep the Engine level. Spilled fuel or fuel vapor may ignite to cause fire.
Chapter 6: Transport And Storage
Transport
Storage
If the Engine will not be used for a long time, storage should be as follows:
1)
The storage area should be dry and free of dust.
2)
Completely drain fuel out of the fuel tank and carburetor.
3)
Replace Engine Oil.
4)
Remove the Spark Plug. Fill about a spoon of fresh Engine Oil onto the cylinder. Pull the recoil starter rope slowly to
distribute Engine Oil evenly. Reinstall the Spark Plug.
5)
Close the choke to protect dust from entering Engine.
6)
Cover the Engine to protect against moisture and dust.
16 DR® VERTICAL SHAFT ENGINE
Chapter 7: Troubleshooting
Engine is difficult to start
TROUBLE
CAUSE
REMEDY
Normal cylinder compression
Normal Spark Plug spark
Something wrong with the fuel system
Fuel supply is not smooth or
no fuel supply
There is not enough fuel in fuel tank
and fuel cock is closed.
Fill fuel, open fuel cock.
Air vent in the fuel filler cap is clogged
Dredge air vent.
Fuel cock is clogged
Clean first and then dredge
Improper or clogged main Oil flow hole.
Readjust or clean, blow to get through.
Needle valve is not closed properly or
start hole is clogged.
Dismantle needle valve and re-pair, clean, blow to
get through.
Float is damaged or sticking.
Repair float
Fuel Supply is
normal
Fuel is too filthy or deteriorated
Replace
There is water in fuel.
Replace
Too much fuel in Engine
Drain extra fuel, dry up Spark Plug electrodes.
Wrong fuel brand
Select proper fuel brand corresponding with the
requirements.
Normal fuel supply system
Normal high –
tension line
Spark Plug is in
bad conditions
Too much carbon deposit and dirt
around electrodes.
Clear away.
Electrodes are burn damaged seriously
or insulators damaged.
Replace Spark Plug.
Improper electrodes gap.
Adjust to proper value.
High-tension line
no spark
Normal Spark
Plug
High –tension line is damaged.
Replace
Ignition coil is damaged.
Replace
Magneto loses magnetism.
Replace
Wrong gap between ignition coil and
flywheel
Adjust gap between ignition and flywheel
Abnormal cylinder compression
Normal fuel supply system
High-tension coil run out Normal ignition
system
Piston ring is worn to or even over its
wear limit
Replace
Piston ring is broken.
Replace
Piston ring is sticking.
Clear up carbon fouling.
Spark Plug is not installed tight or is
without a gasket.
Tighten with a gasket in.
Air leakage between cylinder block and
cylinder head.
Check cylinder gasket, and the flatness of the
surface by which cylinder block contacting with
cylinder head
Tighten cylinder head bolts in stipulated order to
stipulated torque.
Air leakage in the valves
Check valve clearance and tightness, repair if
necessary.
CONTACT US AT www.DRpower.com 17
Gasoline Engine Power Output Insufficiency
TROUBLE
CAUSE
REMEDY
When increasing throttle, speed increase slow or even decrease
and stop running
Fuel supply system
Air in fuel line or fuel line clogged
Exhaust air or dredge fuel line
Main Oil flow hole is not adjusted
properly
Readjust
In carburetor, needle valve hole and
main Oil flow hole clogged.
Clean and blow to get through
Fuel cock is clogged up.
Clean, replace damaged part
Too much carbon deposit in
combusting chamber.
Clear away
Too much car bon fouling in muffler
and exhaust pipe.
Clear away
Air cleaner is clogged up.
Clean air cleaner filter element
Intake pipe is leaking
Repair or replace
Poor compression
Piston or cylinder or piston ring is
worn
Replace the worn
Air leakage from the surface by which
cylinder block contacting with cylinder
head.
Replace cylinder gasket
Too big or too small valve clearance.
Readjust
Valve tightness is poor.
Repair
Gasoline Engine Running Poorly
TROUBLE
CAUSE
REMEDY
Knocking sound
Piston, cylinder, or piston ring is worn
excessively.
Replace the worn
Piston pin and piston pin hole are worn
excessively.
Replace piston or piston pin
Tie rod small head is worn excessively.
Replace tie rod
Roller bearing for crankshaft main shaft is worn.
Replace roller bearing
Abnormal
combustion
Engine is too hot
Shoot trouble
Too much carbon deposit in combustion
chamber
Clear away
Improper gasoline brand or low gasoline quality
Replace with qualified gasoline
Spark lacking
There is water in float chamber
Clean
improper Spark Plug electrodes clearance
Adjust
Something wrong with induced coil, and so on
Check and replace damaged
parts
18 DR® VERTICAL SHAFT ENGINE
Stop Suddenly when Running
TROUBLE
CAUSE
REMEDY
Engine stops
suddenly when
running.
Fuel supply
system
Fuel is empty
Refill fuel
Carburetor is clogged
Check fuel line and clean
Float chamber is leaking
Repair
Needle valve is stuck.
Dismantle float chamber and free
up valve
Ignition system
Spark Plug is damaged, or short-circuited by
carbon deposit
Replace Spark Plug
Side electrode of Spark Plug is damaged
Replace Spark Plug
Spark Plug wire is pulled off
Connect
Ignition coil is damaged or short-circuited
Replace ignition coil
Engine kill wire is touching Engine body
Find where touching and insulate
Other causes
Cylinder is seriously scored, and valve dropped
out
Repair or replace damaged parts
Gasoline Engine Is Overheat
TROUBLE
CAUSE
REMEDY
Gasoline
Engine is
overheating
Wrong Oil used
Refill Engine Oil
Exhaust pipe blocked up
Clean exhaust pipe
Shroud damaged
Repair damaged part
Cooling fins blocked by foreign matter
Clear cooling fins
Connection rod deformation to make piston and cylinder
bushing side wear
Replace connection rod
Cylinder, piston, or piston ring is worn to break seal
between cylinder and crankcase
Replace the worn parts
Improper adjustment of Engine governor to produce speed
high.
Readjust Engine
governor
Crankshaft main bearing burnt out
Replace main bearing
The gasoline Engine should be kept about 80 ~ 110℃temperature around the outlet of the shroud. If the temperature is too high,
it will indicate the gasoline Engine overheating.
CONTACT US AT www.DRpower.com 19
Abnormal Noise Exist When Engine Running
TROUBLE
CAUSE
REMEDY
Knocking sound
Piston, piston ring or cylinder is worn
Replace the worn part
Connection rod or piston pin and
piston pin hole are worn
Replace the worn part
Crankshaft main neck is worn
Replace bearing
Piston ring is broken
Replace piston ring
Metal knocking sound when abnormal
combustion occurs
Too much carbon deposit in
combusting chamber
Clear away carbon deposit
Improper fuel brand
Replace fuel
Engine is overheating
Find a cause and eliminate it
The other
Improper valve clearance
Readjust valve clearance properly
Flywheel is not connected with crank-
shaft tightly
Connect tightly
Specifications
Engine Model
RV170
L×W×H
(not including crankshaft
output terminal) (mm)
395 x 348 x 282
Dry Weight(kg)
12.5
Engine Type
Single cylinder horizontal,4-stroke, (OHV)
Displacement(ml)
173
Bore × Stroke(mm)
70 x 44.2
Theoretical Maximum Power
3.2kw/3600r/min
Maximum Torque
9.0N m/2500r/min
Fuel Consumption
395g/kw·h
Cooling System
Forced air
Ignition System
Capacitance discharge type
Shaft Orientation
Vertical shaft output
Adjustment Data
Items
Technical Data
Service
Spark Plug clearance (Gap)
0.7-0.8mm
See maintenance section
Carburetor idle speed
1900±300r/min
See maintenance section
Valve clearance (cold Engine)
Intake: 0.15 ± 0.02mm
Exhaust: 0.20 ± 0.02mm
Serviced by DR Power
Equipment or authorized
dealer
20 DR® VERTICAL SHAFT ENGINE
Notes: Important Bolt Torque Specs
Items
Specifications
Torque Value
N·m
kg·m
Connection-rod bolt
M7 x 1.25
12
1.2
Cylinder head bolt
M8 × 1.5
26
2.6
Flywheel nut
M14 × 1.5
52
5.2
Crankcase cover bolt
M8 x 1.5
26
2.6
Valve clearance adjusting nut
M6 x 0.5
10
1.0
Valve Rocker Bolt
M8 x 1.25
24
2.4
Table of contents
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