Ryobi RBL26G User manual

ORIGINAL INSTRUCTIONS
Petrol Blower
RBL26G

Important!
It is essential that you read the instructions in this manual before assembling,
operating, and maintaining the product.
Subject to technical modification.

3
Safety, performance, and dependability have
been given top priority in the design of your
blower.
INTENDED USE
The blower is only intended for use outdoors
in dry and well-illuminated conditions.
The product is not intended to be used by
children or persons with reduced physical,
mental, or sensory capabilities.
The product is designed for blowing light
debris, such as leaves, grass, and other
garden refuse.
When used with the vacuum kit, it is intended
to vacuum and mulch debris and deposit it
into the collection bag. The RAC3010 vacuum
kit is sold separately.
The product is not designed to suck in water
or other liquids.
Do not use the product for any other purpose.
GENERAL SAFETY WARNINGS
WARNING
Read all safety warnings and all
instructions. Failure to follow the warnings
and instructions may result in electric shock,
re, and/or serious injury. Save all warnings
and instructions for future reference.
WARNING
Never allow children or people unfamiliar
with these instructions to use the product.
Local regulations may restrict the age of the
operator.
■Some regions have regulations that restrict
the use of the product. Check with your
local authority for advice.
■Do not allow children or untrained
individuals to use the product.
■Ensure before each use that all controls
and safety devices function correctly. Do
not use the product if the off switch does
not stop the engine.
■Never start or run the engine in a closed or
poorly ventilated area; breathing exhaust
fumes can kill.
■Clear the work area before each use.
Remove all objects such as rocks, broken
glass, nails, wire, or string that can be
blown a considerable distance by high
velocity air. Wear hearing protection at
all times while operating the product. The
product is noisy, and permanent hearing
injury may result if precautions to limit your
exposure, reduce noise, and wear hearing
protection are not strictly adhered to.
■Wear full eye protection at all times while
operating the product. The manufacturer
strongly suggests a full face mask or fully
enclosed goggles. Normal spectacles or
sunglasses are not adequate protection.
Objects can be thrown at high speed by
the powerful air jet at any time and may
rebound from hard surfaces toward the
operator.
■While operating the product, always wear
substantial footwear and long trousers.
Do not operate the product when barefoot
or wearing open sandals. Avoid wearing
clothing with loose fitting or that has
hanging cords or ties.
■Do not wear loose clothing or jewellery that
can be drawn into the air inlet. Secure long
hair so it is above shoulder level to prevent
entanglement in moving parts.
■Beware of thrown objects; keep all
bystanders, children, and pets at least 15
m away from the work area.
■Operate the product only at reasonable
hours – not early in the morning or late at
night when people might be disturbed.
■Use rakes or brooms to loosen debris
before operating the product.
■Never operate the product in an explosive
atmosphere.
■Never use the product when you are tired,
ill, or under the influence of alcohol, drugs,
or medicine.
■Before each use, ensure that all controls
and safety devices function correctly.
■Operate the product in a recommended
position and only on a firm and level
surface.
■Do not operate the product on a paved
or gravel surface where ejected material
could cause injury.
■Before each use, always inspect the
housing for damage. Ensure that guards
and handles are in place and properly
secured. Replace worn or damaged
components in sets to preserve balance.

4
Replace damaged or unreadable labels.
■Keep all cooling air inlets clear of debris.
■Never operate the product while people,
especially children, or pets are nearby.
■Avoid using the product in bad weather
conditions especially when there is a risk
of lightning.
■Do not operate in poor lighting. The
operator requires a clear view of the work
area to identify potential hazards.
■Operating similar tools nearby increases
both the risk of hearing injury and the
potential for other persons to enter your
working area.
■Always be sure of your footing on slopes.
Walk, never run.
■Keep proper footing and balance. Do not
overreach. Overreaching can result in loss
of balance.
■Do not use on a ladder, rooftop, tree, or
other unstable support. Stable footing on a
solid surface enables better control of the
blower in unexpected situations.
■Never use the product with defective
guards or shields, or without safety devices
in place.
■Do not modify the product in any way or
use parts and accessories that are not
recommended by the manufacturer.
WARNING
If the product is dropped, suffers heavy
impact or begins to vibrate abnormally,
immediately stop the product and inspect
for damage or identify the cause of the
vibration. Any damage should be properly
repaired or replaced by an authorised
service centre.
■Do not touch the area around the silencer
or engine of the product. These parts get
hot during operation.
■Stop the engine and allow the product to
cool down before refuelling.
■For refuelling and fuel mixing, chose an
area that is well-ventilated, and is away
from ignition sources, such as sparks or
flames, and flammable materials.
■Remember to securely refit the fuel tank
filler cap. Do not smoke when mixing fuel
or filling the fuel tank.
■Mix and store fuel in a container approved
for fuel. Keep an appropriate type of fire
extinguisher nearby for dealing with fuel
fires.
■Remember to securely refit the fuel tank
cap before starting the engine.
■Wipe away any fuel spillage. Move 9 m
away from refuelling site before starting
engine.
■To reduce the risk of injury associated with
contacting rotating parts, always stop the
engine, and make sure all moving parts
have come to a complete stop before:
–leaving the product unattended
–clearing blockages or unclogging chute
–checking, cleaning, or working on the
product
–inspecting the product after striking a
foreign object
■Immediately stop the engine in an event
of accident or breakdown. Do not operate
the product again until it has been fully
checked by an authorised service centre.
■The product is not intended for frequent
use. It is for occasional use for general
applications, such as blowing leaves,
lawn clippings, etc. It is not intended for
prolonged use. Prolonged periods of
operation can cause circulatory problems
to your hands due to vibration. For use in
prolonged period, it is appropriate to use
the product with an anti-vibration feature.
BLOWER SAFETY WARNINGS
■Wear a face filter mask in dusty conditions
to reduce the risk of injury associated with
the inhalation of dust.
■Slightly dampen surfaces in dusty
conditions.
■Do not use the product near open windows.
■Use the full blower nozzle extension so that
the air stream can work close to the ground
and perform effectively.
■Do not point the blower nozzle in the
direction of people or pets.
■Never place objects inside the blower
tubes.
■Do not place the product on top of or near
loose debris. Debris can be sucked into the
intake vent, resulting in possible damage
to the product.

5
TRANSPORTATION AND STORAGE
■Stop the engine and allow the product to
cool down before storing or transporting.
■Clean all foreign material from the product.
■Drain all fuel from the tank into a container
approved for petrol. Remember to properly
replace and tighten the fuel cap.
■Run the engine until it stops. This will
remove all fuel that could become stale and
leave varnish and gum in the fuel system.
■Store the product in a cool, dry, and
well-ventilated place that is inaccessible
to children. Keep away from corrosive
agents, such as garden chemicals and de-
icing salts.
■Do not store outdoors.
■When transporting the product in a vehicle,
secure it against movement or falling to
prevent injury to persons or damage to the
product.
■Abide by all government and local
regulations for the safe storage and
handling of petrol.
Short term (less than 1 month)
■Stop the engine and allow the product to
cool down before storing or transporting.
■Clean all foreign material from the product.
■Store the product in a cool, dry, and well-
ventilated place that is inaccessible to
children.
■Keep away from corrosive agents such as
garden chemicals and de-icing salts.
■Do not store outdoors.
MAINTENANCE
WARNING
When servicing, use only identical parts.
Use of any other parts may create a hazard
or cause product damage.
WARNING
Before inspecting, cleaning, or servicing
the product, shut off engine and wait for all
moving parts to stop. Failure to follow these
instructions can result in serious personal
injury or property damage.
WARNING
Do not at any time let brake uids, petrol,
petroleum-based products, penetrating
lubricants, etc., come in contact with plastic
parts. Chemicals can damage, weaken, or
destroy plastic, which can result in serious
personal injury.
■Avoid using solvents when cleaning plastic
parts. Most plastics are susceptible to
damage from various types of commercial
solvents and may be damaged by their
use. Use clean cloths to remove dirt, dust,
lubricant, grease, etc.
■You can make adjustments and repairs
described in this user manual. For other
repairs, have the product serviced by an
authorised service dealer.
■Check all nuts, bolts, and screws at frequent
intervals for proper tightness to ensure the
product is in safe working condition. Any
part that is damaged should be properly
repaired or replaced by an authorised
service centre.
RESIDUAL RISKS
Even when the product is used as prescribed,
it is still impossible to completely eliminate
certain residual risk factors. The following
hazards may arise in use and the operator
should pay special attention to avoid the
following:
■Injury caused by vibration.
–Always use the right tool for the job. Use
designated handles and restrict working
time and exposure.
■Hearing damage caused by exposure to
noise.
–Wear ear protection and limit exposure.
■Injury from flying objects from the blow tube
airflow
–Wear eye protection at all times.
RISK REDUCTION
It has been reported that vibrations
from handheld tools may contribute to a
condition called Raynaud’s Syndrome in
certain individuals. Symptoms may include
tingling, numbness, and blanching of the
ngers, usually apparent upon exposure to
cold. Hereditary factors, exposure to cold

6
and dampness, diet, smoking and work
practices are all thought to contribute to the
development of these symptoms. There are
measures that can be taken by the operator to
possibly reduce the effects of vibration:
■Keep your body warm in cold weather.
When operating the product wear gloves
to keep the hands and wrists warm. It is
reported that cold weather is a major factor
contributing to Raynaud’s Syndrome.
■After each period of operation, exercise to
increase blood circulation.
■Take frequent work breaks. Limit the
amount of exposure per day.
If you experience any of the symptoms of this
condition, immediately discontinue use and
see your physician.
WARNING
Injuries may be caused, or aggravated, by
prolonged use of a tool. When using any
tool for prolonged periods, ensure you take
regular breaks.
FEATURES
KNOW YOUR BLOWER
See page 15.
The safe use of the product requires an
understanding of the information on the
product and in this operator’s manual as well
as knowledge of the project you are attempting
to do. Before use of the product, familiarise
yourself with all operating features and safety
rules.
BLOWER TUBE AND NOZZLES
The blower tube can be assembled and
installed on the main housing using no tools.
CRUISE CONTROL
The cruise control feature allows the user to
operate the blower without holding the throttle
trigger. To slow the engine, simply push the
cruise control lever forward.
HIGH VELOCITY NOZZLE WITH WET LEAF
SCRAPER
The high velocity nozzle is great for wet sticky
leaves. It allows you to scrape wet leaves or
debris while operating the blower.
SWEEPER NOZZLE
The sweeper nozzle allows for more area
to be covered during blower operation. Use
the sweeper nozzle for everyday blowing
operation.
ENGINE
The blower has a powerful 26 cc engine with
sufcient power to handle tough blowing.
THROTTLE TRIGGER
The blower can be operated at any speed
between idle and full throttle.
ASSEMBLY
UNPACKING
The product requires assembly.
■Carefully remove the product and any
accessories from the box. Make sure that
all items listed in the “What’s in the Box”
section are included.
■Carefully inspect the product to make sure
no breakage or damage occurred during
shipping.
■Do not discard the packing material
until you have carefully inspected and
satisfactorily operated the product.
■If any parts are damaged or missing,
please call your RYOBI service centre for
assistance.
WHAT’S IN THE BOX
See page 14.
■Blower x 1
■Upper blower tube x 1
■High velocity nozzle x 1
■Sweeper nozzle x 1
■2-Stroke engine lubricant x 1
■Operator’s manual x 1
■Combination wrench x 1

7
WARNING
Do not use the product if any parts in the
“What’s in the Box” section are already
assembled when you rst open the box.
The parts in the list are not assembled by
the manufacturer and require customer
installation. Use of a product that may have
been improperly assembled could result in
serious personal injury.
WARNING
If any parts are damaged or missing, do
not operate the product until the parts are
replaced. Use of the product with damaged
or missing parts could result in serious
personal injury.
WARNING
Do not attempt to modify the product or
create accessories not recommended for
use with the product. Any such alteration
or modication is misuse and could result
in a hazardous condition leading to possible
serious personal injury.
WARNING
To prevent accidental starting that could
cause serious personal injury, always
disconnect the engine spark plug wire from
the spark plug when assembling parts.
OPERATION
WARNING
Do not allow familiarity with tools to make
you careless. Remember that a careless
fraction of a second is sufcient to inict
serious injury.
WARNING
Always wear eye protection with side
shields marked to comply with standards,
along with hearing protection. Failure to do
so could result in serious injuries such as
objects being thrown into your eyes.
FUELLING AND REFUELLING
See page 16 (step 2).
MIXING THE FUEL
The product is powered by a 2-stroke engine
and requires premixing petrol and 2-stroke oil.
The mixture should be at a 50:1 ratio.
NOTE: We recommend you use synthetic
2-stroke lubricant. Only use a quality synthetic
2-stroke lubricant in the product to ensure top
performance and engine longevity.
NOTE: If using similar containers for different
fuels, label the container with its contents and
the date it was added.
TO MIX THE FUEL:
■Pre-mix unleaded petrol and 2-stroke
engine lubricant in a clean container
approved for petrol.
■The engine of the product is certified to
operate on unleaded petrol intended for
automotive use with an octane rating of 91
or higher.
■Do not use any type of pre-mixed petrol/
lubricant from fuel service stations; this
includes the pre-mixed petrol/lubricant
intended for use in mopeds, motorcycles,
etc.
■Avoid using ethanol fuels or fuels
containing ethanol. The use of ethanol
fuels may result in damage to the engine
of the product.
■Use only synthetic 2-stroke lubricant. Do
not use automotive lubricant or 2-stroke
outboard lubricant.
■Mix 2% synthetic 2-stroke lubricant into the
petrol. This is a 50:1 ratio.
■Mix the fuel thoroughly and also each time
before fuelling.
■Mix in small quantities. Do not mix quantities
larger than usable in a 30-day period. A
synthetic 2-stroke lubricant containing a
fuel stabiliser is recommended.
1 L + 20 mL =
2 L + 40 mL =
3 L + 60 mL = 50:1 (2%)
4 L + 80 mL =
5 L + 100 mL =

8
FILLING THE TANK
See page 17 (step 4).
WARNING
Petrol is extremely ammable and explosive.
A re or explosion from petrol will burn you
and others. Always shut off engine before
fuelling. Never add fuel to a machine with
a running or hot engine. Move at least 9 m
from refuelling site before starting engine.
Do not smoke. Stay away from open ames
and sparks. Failure to safely handle fuel
could result in serious personal injury.
■Clean the surface around the fuel cap to
prevent contamination.
■Wipe spilled fuel from the product.
■Move at least 9 m away from refuelling
area before starting the product.
NOTE: It is normal for smoke to be emitted from
a new engine during rst use.
WARNING
Check for fuel leaks. A leaking fuel cap
is a re hazard and must be replaced
immediately. If you nd any leaks, correct
the problem before using the product.
Failure to do so could result in a re that
could cause serious personal injury.
USING THE BLOWER
See page 21.
■Check your equipment before operation,
especially the muffler, air intakes, and air
filters.
■Use rakes and brooms to loosen debris
before blowing.
WARNING
Never run the product without the blower
tubes installed. Failure to follow these steps
could result in possible serious injuries.
WARNING
Always wear eye protection with side
shields marked to comply with standards,
along with hearing protection. Failure to
do so could result in objects being thrown
into your eyes and other possible serious
injuries.
WARNING
Always hold the blower away from your
body with the handle in your right hand when
operating as a blower, keeping clearance
between your body and the product. The
mufer side of the blower should be away
from your body. Any contact with the
housing can result in burns and/or other
serious personal injury.
■To keep from scattering debris, blow
around the outer edges of a debris pile.
Never blow directly into the centre of a pile.
■Operate power equipment at reasonable
hours only - not early in the morning or late
at night when people might be disturbed.
Comply with the times listed with local
authorities.
■To reduce sound levels, limit the number of
pieces of equipment used at any one time.
■Operate blower at the lowest possible
throttle speed to do the job.
■In dusty conditions, slightly dampen
surfaces when water is available.
■After using blowers or other equipment,
clean up. Dispose of debris properly.
■Use the sweeper nozzle for the everyday
blowing operation. This nozzle allows for
more area to be covered during the blowing
operation.
■The high velocity nozzle is specifically
designed for wet sticky leaves. It allows
you to scrape wet leaves or debris while
operating the blower.

9
WARNING
Do not place blower on top of or near loose
debris or gravel. Debris may be sucked
into blower intake vent resulting in possible
damage to the product and could result in
serious personal injury.
WARNING
Watch out for children, pets, open windows,
or freshly washed cars, and blow debris
safely away.
CLEANING THE AIR FILTER
See page 22.
A wet or dirty air lter causes starting difculty,
loss of performance, and shorten the life span
of the engine. The air lter should be checked
and cleaned after 5 hours of operation. Inspect
and clean more frequently if used in dusty dirty
conditions.
For best performance, the air lter should be
replaced every 25 hours or yearly.
REPLACING THE SPARK PLUG
See page 24.
The product’s engine uses a Champion RCJ6Y
spark plug. Replace with a recommended
spark plug every 25 hours or annually.
CLEANING THE EXHAUST PORT, MUF-
FLER, AND SPARK ARRESTOR
Depending on the type of fuel used, the type
and amount of lubricant used, and/or your
operating conditions, the exhaust port, mufer,
and/or spark arrestor screen may become
blocked with carbon deposits. If you notice a
power loss with your petrol-powered product,
you may need to remove these deposits to
restore performance. We highly recommend
that only qualied service technicians perform
this service.
The mufer must be replaced after 50
hours running or yearly to ensure proper
performance of your product.
WARNING
To avoid a re hazard, never run the blower
without the spark arrestor in place.
FUEL CAP
WARNING
A leaking fuel cap is a re hazard and must
be replaced immediately.
The fuel cap contains a sealing gasket and a
check valve to allow air in. A clogged check
valve will cause poor engine performance.
If performance improves when the fuel cap
is loosened, the check valve may be faulty.
Replace fuel cap if required.
When retting the fuel cap ensure it is not
cross-threaded, otherwise it will leak.
FUEL FILTER
The fuel supplied to the engine is passed
through a lter to remove any contaminants
from entering the engine. Contaminants in the
fuel can cause poor performance and damage
to the engine.
The fuel lter is a non-serviceable item and, if
needed, should be replaced by an authorised
service centre.
SYMBOLS ON THE PRODUCT
Safety alert
Please read the instructions
carefully before using the
product.
Wear eye protection.
Wear ear protection.

10
Warning! Hot surface.
Beware of thrown or ying
objects. Keep all bystanders,
especially children and pets,
at least 15 m away from the
operating area.
Do not run unit without tubes
in place.
Risk of long hair being drawn
into air inlet.
Risk of loose clothing being
drawn into air intake.
To reduce the risk of injury or
damage, avoid contact with
any hot surface.
Beware of rotating fans.
Keep hands and feet out of
openings while the product is
running.
Use unleaded petrol intended
for motor vehicle use with an
octane rating of 91 or higher.
Use 2-stroke oil for air cooled
engines.
Mix the fuel mix thoroughly
and also each time before
refuelling.
To stop the product, press the
switch to the “STOP” position.
Set throttle.
Press the primer bulb.
Pull the starter grip.
Run the engine at full throttle
for 10 seconds.
Full choke position.
Half choke position.
Run position.
Per ANSI B175.2
Blower mode: [79.8 dB(A)]
Vacuum mode:[79.2 dB(A)]
The bystander sound level is 79.8
dB(A) for blower mode, and 79.2 dB(A)
for vacuum mode per ANSI B175.2.
Regulatory Compliance
Mark (RCM). The product
meets applicable regulatory
requirements.
Take off blower tube from
housing.
Waste electrical products
should not be disposed of
with household waste. Please
recycle where facilities exist.
Check with your local authority
or retailer for recycling advice.
SYMBOLS IN THIS MANUAL
Note
Warning
Parts or accessories are sold
separately

11
The following signal words and meanings
are intended to explain the levels of risk
associated with the product:
DANGER
Indicates an imminently hazardous
situation, which, if not avoided, will result in
death or serious injury.
WARNING
Indicates a potentially hazardous situation,
which, if not avoided, could result in death
or serious injury.
CAUTION
Indicates a potentially hazardous situation,
which, if not avoided, may result in minor or
moderate injury.
CAUTION
Without safety alert symbol
Indicates a situation that may result in
property damage.

12
TROUBLESHOOTING
Problem Possible cause Solution
Engine fails to start.
No fuel in the tank. Fill the tank.
The spark plug shorted or fouled. Replace the spark plug.
The spark plug is broken (cracked
porcelain or electrodes broken).
Replace the spark plug.
The spark plug wire is shorted, broken,
or disconnected from spark plug.
Contact an authorised service centre.
Ignition is inoperative. Contact an authorised service centre.
Engine ooded Remove spark plug, turn blower to aim
spark plug hole at the ground. Adjust
the choke lever to “RUN” position and
pull starter cord 10-15 times. This will
clear excess fuel from the engine.
Remove any fuel which is splashed
on the product. Clean and reinstall
spark plug. Clean up any spilled fuel
and move at least 9 m away before
restarting. Pull starter cord 3 times with
choke lever at “RUN” position. If engine
does not start, rotate choke lever to
“COLD START” position and repeat
normal starting procedure. If engine still
fails to start, repeat procedure with a
new spark plug.
Engine is hard to start.
Water in petrol or stale fuel mixture. Drain entire fuel system and rell with
fresh fuel.
Too much lubricant in fuel mixture. Drain and rell with correct mixture.
Engine is under or over choked. Adjust choke as necessary.
Weak spark at spark plug Contact an authorised service centre.
Engine lacks power. Dirty air lter Clean or replace the air lter.
Engine overheats. Insufcient lubricant in fuel mixture. Mix fuel as describe in the operation
section.

13

14
WHAT’S IN THE BOX
x 1
x 1x 1
x 1
x 1x 1
x 1
RBL26G

15
Know your product
KNOW YOUR PRODUCT
7891112
13
1014
5
4 6
17
16
15
3
21
1. Switch
2. Throttle trigger
3. Upper handle
4. Air filter cover
5. Air filter securing knob
6. Spark plug boot
7. Primer bulb
8. Choke lever
9. Fuel cap
10. Sweeper nozzle
11. Starter grip
12. Combination wrench
13. Impeller cover door
14. High velocity nozzle with wet leaf scraper
15. Upper blower tube
16. Locking tab
17. Cruise control lever

16
GETTING STARTED
(50 : 1)
VI
4x
1
8
2
9
Wear full eye and ear protection, substantial footwear, and
long trousers at all times while operating the product. Do
not operate the product when barefoot or wearing open
sandals.
Pre-mix 2-stroke engine lubricant and unleaded petrol in a
clean container approved for petrol at a 50:1 ratio.
Pull the starter grip sharply until the engine attempts to
start. Do not pull the starter grip more than 4 times.
Set the choke lever to “HALF“ choke position.

17
GETTING STARTEDGETTING STARTED GETTING STARTED
6x
VI
10 11
1
2
3
4
12 13 14
1010
567
1
2
3
4
3
1. Align raised tabs on upper blower tube with the slots on blower housing outlet. 2. Attach and tighten securely by turning
clockwise until it clicks into place. 3. Attach desired nozzle to upper blower tube. 4. Tighten securely by turning clockwise
until it clicks into place.
1. Loosen the fuel cap slowly by turning it counterclockwise.
2. Remove the fuel cap. 3. Pour the fuel mixture carefully
into the tank. Replace and tighten the fuel cap.
Press the primer bulb 10 times or until fuel appears. Pull the cruise control lever back, towards the user. Set the choke lever to “FULL” choke position.
Pull the starter grip sharply until the engine starts. Do not
pull the starter grip more than 6 times.
When engine starts, wait and let it warm up for 10 seconds. Set the choke lever to “RUN” position. Hold the blower with the upper handle in your right hand.
Hold the blower as shown so the air stream can work close
to the ground.
To stop the engine, toggle the switch to the “STOP”
position.

18

19
OVERVIEW
p.18 p.20
p.22 p.24
p.20
p.25
Warm start engine Using the blower Cleaning the air filter
Replacing the spark plug Cleaning the blower Storing the blower

20
OPERATION
1010
VI
6x
1
3
2
4
WARM START ENGINE
1. Press the primer bulb 10 times.
2. Set the choke lever to “RUN“ position.
3. Pull the starter grip until the engine
starts. Do not pull the starter grip more
than 6 times.
4. To stop the engine, toggle the switch to
the “STOP” position.
Table of contents
Other Ryobi Blower manuals

Ryobi
Ryobi RY28000 User manual

Ryobi
Ryobi P2102 User manual

Ryobi
Ryobi RY18BLXB User manual

Ryobi
Ryobi OBV18 User manual

Ryobi
Ryobi RGBV3100 User manual

Ryobi
Ryobi 18 Volt One+ Series User manual

Ryobi
Ryobi RBL30MVB User manual

Ryobi
Ryobi RY404010 User manual

Ryobi
Ryobi RY404017 User manual

Ryobi
Ryobi RY421021 User manual