DR W210FS/P Quick start guide

DR Power Equipment
Toll-free phone:1-800-DR-OWNER (376-
9637)
Read and understand this manual and
all instructions before operating the DR GASOLINE ENGINE.
DR®
GASOLINE ENGINE
SAFETY
& OPERATING INSTRUCTIONS
Mode
ls:
W210FS/P
W300FS
(E)/P
W420FS(E)
/P

2DR® GASOLINE ENGINE
This
indicates a hazardous situation, which, if not avoided, will result in death or serious injury.
Keep this owner's manual handy, so you can refer to it at any time.
This owner's manual is considered a permanent part of the engine and should remain with the engine if it changes hands.
The information and specifications included in this publication were in effect at the time of approval for printing.
Only the D Type is equipped for both electric and manual starting.
If a problem should arise, or if you have any questions about your engine, consult your engine dealer.
READ THIS OWNER’S MANUAL CAREFULLY. Pay special attention to areas that use the warning symbols below and any
instructions that follow:
Table of Contents
ENGINE SAFETY................................................................................................................................................................................... 3
COMPONENTS & CONTROL LOCATIONS........................................................................................................................................ 4
CONTROLS ........................................................................................................................................................................................... 5
ADDING OIL FOR THE FIRST TIME.................................................................................................................................................... 7
ADDING GAS FOR THE FIRST TIME .................................................................................................................................................. 8
CHECK BEFORE OPERATION .............................................................................................................................................................. 9
OPERATION.......................................................................................................................................................................................... 10
MAINTENANCE.................................................................................................................................................................................... 14
STORAGE / TRANSPORTING .............................................................................................................................................................. 21
TROUBLESHOOTING .......................................................................................................................................................................... 24
TECHNICAL & CONSUMER INFORMATION..................................................................................................................................... 26
SPECIFICATIONS.................................................................................................................................................................................. 29
WIRING DIAGRAMS............................................................................................................................................................................. 30
This indicates a
hazardous situation, which, if not avoided, could result in minor or moderate injury.
This inform
ation 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 hazardo
us situation, which, if not avoided, could result in death or serious injury.

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ENGINE 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 yourself and others.
Owner Responsibilities
•The engines are designed to give safe and dependable service if operated according to instructions. Read and understand this
owner’s manual before operating the engine. Failure to do so could result in personal injury or equipment damage.
•Know how to stop the engine quickly and understand the 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 away from the area of operation.
Other Equipment
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.
Safety with Gasoline - Powered Machines
Gasoline is a highly fla
mmable 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, open flame,
and out of the reach of children.
•
Replace rubber fuel lines and grommets when worn or damaged and after 5 years of use.
•
Fill the gasoline tank outdoors with the engine off and allow the engine to cool completely. Don't handle gasoline if you or
anyone nearby is smoking, or if you're near anything that could cause it to ignite or explode. Reinstall 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 in any enclosure. Never store a machine that has gas in the tank, or a fuel
container, near an open flame or spark such as a water heater, space heater, clothes dryer, or furnace.
•
Never adjust or repairs with the engine running. Shut down the engine, disconnect the spark plug wire, keeping it away from
the spark plug to prevent accidental starting, wait 5 minutes before adjusting or repairing.
•
Never tamper with the engine’s governor setting. The governor controls the maximum safe operation speed and protects the
engine. Over-speeding the engine is dangerous and will cause damage to the engine and to the other moving parts of the
machine. If required, see your authorized dealer for engine governor adjustments.
•
Keep combustible substances away from the engine.
•
Never cover the machine while the muffler is still hot.
•
Do not operate the engine with the air cleaner or the carburetor air intake cover removed. Removal of such parts could create
a fire hazard. Do not use flammable solutions to clean the air filter.
•
The exhaust area on the engine becomes very hot with use. Allow the engine to cool before doing maintenance or adjusting.
•
Never tamper with safety devices. Check their proper operation regularly.
•
To reduce fire hazard, keep the engine and muffler free of debris build-up.

4DR® GASOLINE ENGINE
IGNITION SWITCH
SPARK PLUG
RECOIL STARTER
CHOKE /
THROTTLE LEVER
FUEL
FILLER CAP
MUFFLER
START MOTOR
CONTROL BOX
OIL DRAIN PLUG
OIL DIPSTICK
START MOTOR
START
ENRICHMENT
PUMP
FUEL TANK
OIL FILL PLUG
FUEL SWITCH
COMPONENTS & CONTROL LOCATIONS

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CONTROLS
Fuel Valve Lever
The fuel valve opens and closes the passage between the fuel tank and the carburetor. The fuel valve lever must be in the ON
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.
Throttle Lever
The throttle lever controls engine speed.
Moving the throttle lever in the directions shown makes the engine run faster or slower.

6DR® GASOLINE ENGINE
Engine Switch
The engine switch enables and disables the ignition system.
The engine switch must be in the RUN position for the engine to run. Turning the engine switch to the STOP position stops the
engine.
Choke Lever
The choke lever opens and closes the choke valve in the carburetor. The CHOKE OFF position enriches the fuel mixture for
starting a cold engine.
The Choke Run position provides the correct fuel mixture for operation after starting, and for restarting a warm engine.
Recoil Starter Grip
Pulling the starter grip operates the recoil starter to crank the engine.
STARTER GRIP

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ADDING OIL FOR THE FIRST TIME
Oil Capacity W210FS/P: 20.3 fl oz (0.6L)
W300FS(E)/P: 32.1 fl oz (0.95L)
W420FS(E)/P: 37.2 fl oz (1.1L)
SAE 10W-30 is recommended for general use. Other viscosities shown in the chart may be used when the average temperature in
your area is within the indicated range.
1. Remove the dipstick and add oil until it reaches the lower threads in the oil filler hole.
2. Reinsert the dipstick into the oil filling hole without screwing it in. Pull dipstick out and check oil level.
3. If the oil level is too low, add oil until it reaches the oil upper level.
4. Reinstall the dipstick when finished and screw all the way in.
Use 4
-stroke engine oil, API service classification
SJ
class or equivalent. Check the API service label on the oil containe
r to be sure
it includes
the letters SJ class or equivalent.
Oil Dipstick
Drain Plug
Oil Upp
er Level
Oil Lower Level
Environment Temperature
SAE Viscosity Grades
Run
ning the engine with insufficient engine oil may damage the engine severely and would not be covered under warranty.

8DR® GASOLINE ENGINE
•
Gasoline is extremely flammable and is explosive under certain conditions.
•
Only add fuel in a well-ventilated area with the engine stopped. Do not smoke and do not 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
cleaned up and is dry before starting the engine.
•
Avoid repeated or prolonged contact with skin or breathing of fuel vapor. Keep out of reach of children.
ADDING GAS FOR THE FIRST TIME
Fuel tank capacities: W210FS/P：2.2 L (2.3 qts)
W300FS(E)/P：4.5 L (4.8 qts)
W420FS(E)/P：5.0 L (5.3 qts)
1. Remove the fuel tank cap.
2. Add gas no higher than the level shown below to allow for expansion.
3. Install the fuel cap when finished.
•
Fuel may damage paint and plastic. Be careful not to spill fuel when refueling. Any damage due to fuel spilling is not covered
under warranty.
•
It is normal to hear a "light knocking" sound when the engine is overloaded. Do not be concerned if this occurs. If "k
nocking"
or sounds occur at a steady speed under normal load, change the brand of gasoline; if the sounds continue, consult your
dealer for help.
•
If you continue to run the engine with a "knocking" sound during normal operation, it will damage the engine.
•
Continuing to use the engine with "knocking" sounds from misusing will void the engine warranty.
MAXIMUM FUEL LEVEL

CONTACT US AT www.DRpower.com 9
CHECK BEFORE OPERATION
Is Your Engine Ready to Go?
For your safety, and to maximize the service life of your equipment, it is very important to take a few moments before you operate
the engine to check its condition. Be sure to take care of any problem you find or have your servicing dealer correct it before you
operate the engine.
Before beginning your pre-operation checks, be sure engine is level and the engine switch is in the STOP position.
Check the General Condition of the Engine
•Look around and underneath the engine for signs of oil or gasoline leaks.
•Remove any excessive dirt or debris, especially around the muffler and recoil starter.
•Look for signs of damage.
•Check 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 the engine 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 check the engine oil level before startup.
Check the fuel level. Starting with a full tank will help to eliminate or reduce operating interruptions for refueling.
Check the Equipment Powered by This Engine
Review the instructions provided with the equipment powered by this engine for any precautions and procedures that should be
followed before engine startup.
•
Improperly maintaining this engine, or failing to correct a problem before operation, could cause a malfunction in which you
could be seriously injured.
•
Always perform a pre-operation inspection before each operation and correct any problem.

10 DR® GASOLINE ENGINE
OPERATION
Safe Operating Precautions
Before operating the engine for the first time, please review the IMPORTANT SAFETY INFORMATION and the chapter titled
BEFORE OPERATION.
Review the instructions provided with the equipment powered by this engine for any safety precautions that should be observed in
conjunction with engine startup, shutdown, or operation.
Starting the Engine
1. Move the fuel valve lever to the ON position.
2. To start a cold engine, move the choke lever to the Choke Off position. (To restart a warm engine, leave the choke lever in the
Choke Run position.)
3. Push the engine key switch to the ON position.
Carbon monoxide gas
is toxic. Breathing it can cause unconsciousness and even kill you. Avoid any areas or actions that expose
you to carbo
n monoxide.

CONTACT US AT www.DRpower.com 11
4. ELECTRIC START: For starting engine with electric start, connect start cord to 120 V power supply.
5. Press start button to start engine.
Note: AC start rule: run 5 seconds, stop for 5 seconds, and run no more than 10 times continuously. If start motor runs
continuously, and the engine still can't start, let the ac starter motor cool at least 40 minutes, then restart the start procedure.
6. RECOIL STARTER (all engine types): Pull the starter grip lightly until you feel resistance, then pull briskly.
7. Return the starter grip gently.
8. If the choke lever has been moved to the Choke Off position to start the engine, gradually move it to the Choke Run position as
the engine warms up.
STARTER GRIP

12 DR® GASOLINE ENGINE
Stopping the Engine
To stop the engine in an emergency, simply Pull the engine switch to the STOP position. Under normal conditions, use the
following procedure.
1. Move the throttle lever to the SLOW position.
2. Turn the fuel valve lever to the OFF position.
3. Pull the engine switch to the STOP position.

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Setting Engine Speed
1. Position the throttle lever for the desired engine speed.
Note: For engine speed recommendations, refer to the instructions provided with the equipment powered by this engine.

14 DR® GASOLINE ENGINE
MAINTENANCE
The Importance of Maintenance
Good maintenance is essential for safe, economical, and trouble-free operation. It will also help reduce air pollution.
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
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 you should perform a given task.
Safety Precautions
Make sure the engine is off before you begin any maintenance or repairs. This will eliminate several potential hazards:
Carbon Monoxide Poisoning from Engine Exhaust
Be sure there is adequate ventilation whenever you operate the engine.
Injury from Hot Parts
Let the engine and exhaust system cool before touching.
Injury from Moving Parts
Do not run engine unless instructed to do so.
• Read the instructions before you begin, and make sure you have the tools and skills required.
• 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 away from all fuel-related parts.
Remember that your servicing dealer knows your engine best and is fully equipped to maintain and repair it.
To ensure the best quality and reliability, use only new, genuine parts or their equivalents for repair and replacement.
•
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.
•
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’s manual.

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Maintenance Schedule
REGULAR SERVICE PERIOD
Performed at every indicated month or
operating hour interval, whichever comes.
first.
Each
use
First
month or
20 Hrs.
Every 3
months or
50 Hrs.
Every 6
months or
100 Hrs.
Every
yea
r or
150 Hrs.
ITEM
●
Engine oil Check level
O
Change
O
O
●
Sediment Cup Clean
O
●
Spark plug Check-Clean
O
Replace
O
●
Idle speed Check-Adjust
O (1)
●
Valve clearance Check-Adjust
O (1)
●
Fuel tank and filter Clean
O
(1)
●
Combustion chamber Clean After every 150 Hrs.
●
Fuel line Check Every 2 years (Replace if necessary)
•Emission-related items.
（1）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.

16 DR® GASOLINE ENGINE
REFUELING
Fuel tank capacities:
W210FS/P：2.2 L (2.3 qts)
W300FS(E)/P：4.5 L (4.8 qts)
W420FS(E)/P：5.0 L (5.3 qts)
With the engine stopped, remove the fuel tank cap and check the fuel level. Refill the tank if the fuel level is low.
Refuel in a well-ventilated area before starting the engine. If the engine has been running, allow it to cool. Refuel carefully to avoid
spilling fuel. Do not fill above the fuel strainer shoulder. After refueling, tighten the fuel tank cap securely.
Never refuel the engine inside a building where gasoline fumes may reach flames or sparks. Keep gasoline away from appliance
pilot lights, barbecues, electric appliances, power tools, etc.
Spilled fuel is not only a fire hazard, it causes environmental damage. Wipe up spills immediately.
Fuel Recommendations
Use unleaded gasoline with a pump octane rating of 86 or higher.
These engines are certified to operate on unleaded gasoline. Unleaded gasoline produces fewer engine and spark plug deposits
and extends exhaust system life.
Never use stale or contaminated gasoline or an oil/gasoline mixture. Avoid getting dirt or water in the fuel tank.
Occasionally you may hear a light ‘‘spark knock’’ or ‘‘pinging’’ (metallic rapping noise) while operating under heavy loads. This is
no cause for concern.
If spark knock or pinging occurs at a steady engine speed, under normal load, change brands of gasoline. If spark knock or
pinging persists, see an authorized servicing dealer.
MAXIMUM FUEL LEVEL
Gasoline is highly flamma
ble and explosive. You can be burned or seriously injured when handling fuel.
•
Stop the engine and keep heat, sparks, and flame away.
•
Handle fuel only outdoors.
•
Wipe up spills immediately.
Fuel can damage paint
and plastic. Be careful not to spill fuel when filling your fuel tank. Damage caused by spilled fuel is not
covered under
warranty.
•
Running the engine with persistent spark knock or pinging can cause engine damage.
•
Running the engine with persistent spark knock or pinging is considered misuse, and the Distributor’s
Limited Warranty does
not cover parts damaged by misuse.

CONTACT US AT www.DRpower.com 17
Engine Oil Level Check
Check the engine oil level with the engine stopped and in a level position.
1. Remove the filler cap/dipstick and wipe it clean.
2. Insert and remove the dipstick without screwing it into the filler neck. Check the oil level shown on the dipstick.
3. If the oil level is low, fill with the recommended oil.
4. Screw in the filler cap/dipstick securely.
Engine Oil Change
Drain the used oil while the engine is warm. Warm oil drains quickly and completely.
1. Place a suitable container below the engine to catch the used oil, and then remove the filler cap/dipstick and the drain plug.
2. Allow used oil to drain completely, and then reinstall the drain plug, and tighten it securely.
Dispose of used motor oil 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 discard used oil in the trash; pour it on the
ground; or down a drain.
3. With the engine in a level position, fill to outer edge of the oil filler hole with the recommended oil.
Engine oil capacities:
W210FS/P: 20.3 fl oz (0.6L)
W300FS(E)/P: 32.1 fl oz (0.95L)
W420FS(E)/P: 37.2 fl oz (1.1L)
Running the engine 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 the safe limit.
However, to avoid the inconvenience of an unexpected shutdown, fill to the upper limit, and check the oil level regularly.
Running the engin
e with a low oil level can cause engine damage. The Oil Alert system (applicable engine types) will au
tomatically
stop
the engine before the oil level falls below safe limit. However, to avoid the inconvenience of an unexpected shutdown, always
check the e
ngine oil level before startup.

18 DR® GASOLINE ENGINE
4. Screw in the filler cap/dipstick securely.
Servicing Your Engine
Engine Oil Recommendations
Oil is a major factor affecting performance and service life. Use 4-stroke automotive detergent oil.
SAE 10W-30 is recommended for general use. Other viscosities shown in the chart may be used when the average temperature in
your area is within the recommended range.
The SAE oil viscosity and service classification are in the API label on the oil container. We recommend that you use API SERVICE
Category SJ class or equivalent.
SAE Viscosity Grades
AMBIENT TEMPERATURE

CONTACT US AT www.DRpower.com 19
Sediment Cup Cleaning
1. Move the fuel valve to the OFF position, and then remove the fuel sediment cup and O-ring.
2. Wash the sediment cup and O-ring in nonflammable solvent and dry them thoroughly.
3. Place the O-ring in the fuel valve and install the sediment cup. Tighten the sediment cup securely.
4. Move the fuel valve to the ON position, and check for leaks. Replace the O-ring if there is any leakage.
Gasoline is highly fl
ammable and explosive. You can be burned or seriously injured when handling fuel.
•
Stop the engine and keep heat, sparks, and flame away.
•
Handle fuel only outdoors.
•
Wipe up spills immediately.

20 DR® GASOLINE ENGINE
Spark Plug Service
Recommended spark plugs: F7RTC or other equivalents.
1. Disconnect the spark plug cap, and remove any dirt from around spark plug area.
2. Remove spark plug with a spark plug wrench.
3. Inspect spark plug. Replace if electrodes are worn, or if insulator is cracked or chipped.
4. Measure spark plug electrode gap with a suitable gauge. The gap should be 0.028 in -0.031 in (0.70 mm - 0.80 mm). Correct
the gap, if necessary, by carefully bending side electrode.
5. Install spark plug carefully, by hand, to avoid cross-threading.
6. After the spark plug seats, tighten with a spark plug wrench to compress the washer.
If reinstalling used spark plug tighten 1/8 - 1/4 turn after the spark plug seats.
If installing a new spark plug, tighten 1/2 turn after spark plug seats.
7. Attach spark plug cap.
Idle Speed Adjustment
1. Start the engine outdoors and allow it to warm up to operating
temperature.
2. Move throttle lever to its slowest position.
3. Turn throttle stop screw to obtain standard idle speed. Standard idle
speed: 2,000±200 rpm
THROTTLE STOP SCREW
An incorrect spark plug can cause engine
damage.
•
A loose spark plug can overheat and damage engine.
•
Over tightening spark plug can damage threads in cylinder head.