1. SAFETY PRECAUTIONS
Please make sure you review each precaution carefully
．
Pay special attention to statement preceded by the following words
．
“WARNING” indicates a strong possibility of severe personal injury or loss of life if
instructions are not followed
．
“CAUTION” indicates a possibility of personal injury or equipment damage if instructions
are not followed.
EXHAUST PRECAUTIONS
• Never inhale exhaust gasses.
• They contain carbon monoxide
，
a colorless
，
odorless and extremely dangerous gas which can
cause unconsciousness or death
．
• Never operate the engine indoors or in a poorly ventilated area
，
such as tunnel
，
cave
，
etc
．
• Exercise extreme care when operating the engine near people or animals
．
• Keep the exhaust pipe free of foreign objects.
REFUELING PRECAUTIONS
• Gasoline and kerosene are extremely flammable and its vapors can explode if ignited
．
• Do not refuel indoors or in a poorly ventilated area
．
• Be sure to stop the engine prior to refueling
．
• Do not remove fuel tank cap nor fill fuel tank while engine is hot or running
．
• Allow engine to cool at least 2 minutes before refueling
．
• Do not overfill the fuel tank
．
lf fuel is spilt
，
wipe it away carefully and wait until the fuel has dried
before starting the engine
．
• After refueling
，
make sure that the fuel cap is secured to prevent spillage
．
FIRE PREVENTION
• Do not operate the engine while smoking or near an open flame
．
• Do not use around dry brush,twigs,cloth rags,or other flammable materials
．
• Keep cooling air intake (recoil starter area) and muffler side of the engine at least 1 meter (3 feet)
away from buildings,obstructions and other burnable objects.
• Keep the engine away from flammables and other hazardous materials (trash
，
rags
，
lubricants,ex-
plosives)
．
OTHER SAFETY PRECAUTIONS
• Place the protective covers over the rotating parts
If rotating parts such as the drive shaft,pulley,belt,etc.are left exposed,they are potentially hazar-
dous. To prevent injury, equip them with protective covers or shrouds.
• Be careful of hot parts
The muffler and other engine parts become very hot while the engine is running or just after it has
stopped.Operate the engine in a safe area and keep children away from the running engine
．
• Do not touch the spark plug and ignition cable when starting and operating the engine
．
• Never make adjustments on the machinery while it is connected to the engine,without first remo-
ving the ignition cable from the spark plug.Turning the crankshaft by hand during adjusting or clea-
ning might start the engine,and machinery with it,causing serious injury to the operator
．
• Operate the engine on a stable
，
level surface. If the engine is tilted
，
fuel spillage may result
．
NOTE:
Operating the engine at a steep incline may cause seizure due to improper lubrication
even with a maximum oil level
．
• Do not transport the engine with fuel in tank or with fuel strainer cock open.
• Do not move the engine while in operation when it has been removed from the equipment
．
• Keep the unit dry (do not operate it in rainy conditions)
.
PRE-OPERATION CHECKS
• Carefully check fuel hoses and joints for looseness and fuel leakage.Leaked fuel creates a poten-
tially dangerous situation
．
• Check bolts and nuts for looseness.A loose bolt or nut may cause serious engine trouble.
• Check the engine oil and refill if necessary
．
• Check the fuel level and refill if necessary.Take care not to overfill the tank
．
• Keep cylinder fins and recoil starter free of dirt
，
grass and other debris
．
• Wear snug fitting working clothes when operating the engine
．
Loose aprons,towels,belt,etc.,may be caught in the engine or drive train, causing a dangerous
situation
．
2. SYMBOLS
3. COMPONENTS
(See Fig
. 1
)
Regarding the number 1 to 10, refer to figures inside covers.
1. Exhaust outlet
2. Muffler cover
3. Air cleaner
4. Speed control lever
5. Fuel tank cap (gasoline)
6. Fuel tank cap (kerosene)
7. Fuel tank
8. Stop switch
9. Starter handle
10. Recoil starter
11. Fuel cock
12. Choke lever
13. Fuel strainer
14. Carburetor
15. Oil gauge (oil filler)
16. Oil draln plug
17. Engine serial no.(stamping)
18. P.t.o. shaft
19. Engine name label (spec. no.)
20. Spark plug
4. PRE-OPERATION CHECKS
NOTE:
This engine does include oil. Before starting engine,fill with oil. Do not over-fill.
1
．
CHECK ENGINE OIL
(See Fig. 2)
Before checking or refilling engine oil
，
be sure the engine is located on stable,level surface and
stopped
．
Do not screw the oil gauge into the oil filler neck to check oil level.If the oil level is low,refill to the
upper level with the following recommended oil.
Use 4-stroke automotive detergent oil of API service class SE or higher grade
．
Select the viscosity based on the air temperature at the time of operation as shown in the table.
(See Fig 2-1)
OlL CAPACITY: 0.6 L
Explanation of (Fig. 2 - 2)
Oil Gauge
Upper Level (0.6 liter)
Lower Level
2
．
CHECK FUEL (See Fig. 3 )
Do not refuel while smoking,near an open flame or other such potential fire hazards.Otherwise fire
accident may occur.
• If leveI is low,fill to the shoulder of the fueI fliter. Fill the kerosene tank with kerosene
，
and the
gasoline tank with gasoline,respectively. Particularly be careful not to take gasoline for kerosene or
vice versa.
• Stop the engine and open the cap
.
Use unleaded automotive gasoline only
．
• Fuel Tank Capacity.
DKERB20-AK
：
Gasoline 0.17 L
Kerosene 3.4 L
• Close the fuel cock before filling the fuel tank
．
• Do not fill above the top of the fuel filter screen (marked), or the fuel may overflow when it heats up
later and expands.
• When filling the fuel tank,always use the fuel filter screen.
• Wipe off any spilled fuel before starting the engine. (See Fig. 3-2)
5
．
OPERATING YOUR ENGINE
(See Fig. 4)
1. STARTING
(1) Open the fuel cock.(Kerosene) (See Fig. 4-1 )
(2) Pull the gasoline valve of the carburetor until the fuel overflows. (See Fig. 4-2)
(3) Turn the STOP SWITCH to the position “I” (ON)
．
(See Fig. 4-3)
(4) Set the speed control lever 1/3 of the way towards the high speed position. (See Fig. 4-5)
(5) Close the choke lever. (See Fig. 4-5)
• If the engine is cold or the ambient temperature is low
，
close the choke lever fully.
• If the engine is warm or the ambient temperature is high, open the choke lever half-way,or keep it
fully open.
(6) PulI the starter handle slowly untiI resistance is felt. This is the“compression”point. Return the
handle to its original position and pull swiftly. Do not pull out the rope all the way. After starting the
engine, allow the starter handle to return to its original position while still holding the handle. (See
Fig. 4-6)
(7) After starting the engine,gradually open choke by turning the choke lever and finally keep it fully
opened. Do not fully open the choke lever immediately when the engine is cold or the ambient
temperature is low,because the engine may stop. (See Fig. 4-7).
2. RUNNING
(See Fig.5)
(1) After the engine starts,set the speed control lever at the low speed position (L) and warm it up
without load for a few minutes. (See Fig. 5-1)
(2) Gradually move the speed control lever toward the high speed position (H) and set it at the
required engine speed. (See Fig. 5-2)
• Whenever high speed operation is not required, slow the engine down (idle) by moving the speed
control lever to save fuel and to extend engine life
．
3. STOPPING
(See Fig. 6 )
(1) Set the speed control lever at the low speed position and allow the engine to run at low speed for
1 or 2 minutes before stopping (See Fig. 6-1)
(2) Turn the STOP SWITCH counterclockwise to the position "O" (OFF). (See Fig. 6-2)
(3) Close the fuel cock. (See Fig. 6-3)
(4) Pull the starter handle slowly and return the handle to its original position when resistance is felt.
This operation is necessary to prevent outside moist air from intruding into the combustion cham-
ber. (See Fig. 6-4)
STOPPING ENGINE WITH THE FUEL COCK
Close the fuel cock and wait for a while until the engine stops. Avoid to let the fuel remain in the
carburator over long periods, or the passages of the carburator may become clogged with impuri-
ties, and malfunctions may result.
6.MAINTENANCE
(See Fig. 4)
1. DAILY INSPECTION
(See Fig. 7-1)
Before running the engine,check the following service items
．
1. Loose or broken bolts and nuts
2. Clean air cleaner element
3. Enough clean engine oil
4. Leakage of gasoline and engine oil
5. Enough gasoline
6. Enough kerosene
7. Safe surroundings
8. Excessive vibration, noise
2. PERIODlC lNSPECTlON
Periodic maintenance is vital to the safe and efficient operation of your engine
．
Check the table below for periodic maintenance intervals. The below chart is based on the normal
engine operation schedule.
3. INSPECTING THE SPARK PLUG
(See Fig. 7-2)
(1) Clean off carbon deposits on the spark plug electrode using a plug cleaner or wire brush.
(2) Check electrode gap
．
The gap should be 0.6 mm to 0.7 mm(0.02 inch.-0.03 inch.).Adjust the
gap,if necessary, by carefully bending the side electrode.
Recommended Spark Plug: NGK BP4HS or BPR4HS (CHAMPION L95YC or RL95YC)
4. ENGINE OIL CHANGE
(See Fig. 7-3-4)
Initial oil change: After 20 hours of operation
Thereafter: Every 50 hours of operation
(1) When changing oil,stop the engine and loosen the drain plug. Drain the used oil while the engine
is warm. Warm oil drains quickly and completely.
CAUTION!
To prevent injury,pay attention to the hot oil.
8
(2) Re-install the drain plug before refilling oil.
OIL CAPACITY
：
0.6 liter
(3) Refer to page 5 for the recommended oil.
Always use the best grade and clean oil
．
Contaminated oil
，
poor quality oil and shortage of oil cause
damage to engine or shorten the engine life
.
5. CLEANING FUEL STRAINER
(See Fig. 7-5)
WARNING!
Flame Prohibited
(1) Inspect fuel strainer for water and dirt
．
(See Fig. 7-5-1)
(2) To remove water and dirt,close the fuel cock and remove the strainer cup
．
(3) After removing dirt and water,wash the strainer cup with gasoline. Reinstall securely to prevent
leakage
．
CLEANlNG AIR CLEANER
(See Fig. 7-6)
WARNING!
Flame Prohibited
A dirty air cleaner element will cause starting difficulty, power loss, engine malfunctions, and shor-
ten engine life extremely
.
Always keep the air cleaner element clean
．
• Urethane Foam Dual Element Type
Remove the urethane foam and wash in kerosene
．
(See Fig. 7-6-2)
Then saturate it in a mixture of 3 parts kerosene and 1 part engine oil, squeeze the urethane foam to
remove the mixture.
Maintenance items
CLEAN ENGlNE AND CHECK
BOLTS AND NUTS
Every
8 hours
(Daily)
Every
50 hours
(Weekly)
Every
200 hours
(Monthly)
Every
300
hours
Every
500
hours
Every
1000
hours
(Daily)
(Refill daily up to upper level.)
(Initial 20 hours)
CLEAN AND ADJUST SPARK PLUG
AND ELECTRODES
CHECK AND ADJUST VALVE
CLEARANCE
REMOVE CARBON FROM
CYLINDER HEAD
CHECK AND REFILL ENGINE OIL
CHANGE ENGINE OlL
CLEAN SPARK PLUG
CLEAN AlR CLEANER
CLEAN FUEL STRAINER
CLEAN AND ADJUST CARBURETOR
OVERHAUL ENGINE IF NECESSARY
(2) Wash the element in kerosene or diesel fuel. (See Fig. 7-6-1)
With the kerosene or diesel fuel still dripping off, saturate it in a mixture of 3 parts kerosene or diesel
fuel and 1 part engine oil. Shake off excessive oil and reinstall
．
(3)Install the urethane foam and element in the air cleaner.
Clean and replace air cleaner elements more often when operating in dusty environments.
7. FUEL HOSE REPLACEMENT
(See Fig. 7-7)
WARNING!
Take extreme caution when replacing fuel hose; gasoline is extremely flammable
．
Replace the fuel hose every 2 years. If fuel leaks from fuel hose,replace the fuel hose immediately.
8. CHECKING BOLTS, NUTS AND SCREWS
• Retighten loose bolts and nuts.
• Check for fuel and oil leaks.
• Replace damaged parts with new ones.
7. PREPARATIONS FOR STORAGE
1. DISCHARGE FUEL
(See Fig. 8-1)
If you do not use the engine more than 1 month, discharge fuel to prevent gum in the fuel system
and carburetor parts
．
• Remove the strainer cup, place the strainer over a container and open the strainer cock to dischar-
ge fuel from the fuel tank
．
• Remove the drain screw of the carburetor float chamber and discharge fuel.
2. ENGINE OIL
(See Fig. 8-2)
• Change the engine oil with fresh oil.
• Remove the spark plug, pour about 5 cc of engine oil into the cylinder,slowly pull the starter handle
of the recoil starter 2 or 3 times,and reinstall the spark plug
．
3. CLEAN AND STORE
• Slowly pull the recoil starter handle until resistance is felt and leave it in that position.
•Clean the engine thoroughly with an oiled cloth, put the cover on, and store the engine indoors in a
well ventilated, low humidity area.
8. OIL SENSOR INSTRUCTIONS
(OPTIONAL)
1. FUNCTION OF OIL SENSOR
The engine will stop automatically when the oil level falls below the safety limit. The engine cannot
be started unless the level is raised above the prescribed limit. (See Fig. 9-1)
2. RESTARTlNG
(1) Fill the crankcase with oil up to the proper level
．
(2) As for restarting and operating the engine,refer to section “4.OPERATING YOUR ENGINE” on
page 5.
• Check the wire connector from the engine, It must be connected securely to the wire from oil
sensor
.
(See Fig. 9-2-2 Fix the earth wire.)
• Do not remove the oil sensor from the engine for checking oil level and refilling (See Fig. 9-2-1 )
• When selecting the engine oil, refer to page 5 for the recommended Oil.
9. EASY TROUBLESHOOTLNG
(See Fig 10)
WHEN ENGINE WILL NOT START
：
Perform the following checks before you take the engine to
your dealer. If you still have trouble after completing the checks, take the engine to your nearest
dealer.
1. Check the fuel inside the float chamber of carburetor,if it was chenged from kerosene to gasoline.
2. Is there a strong spark across the electrode? (See Fig 10-2)
(1) Is the stop switch at position “I” (ON)?
(2) Remove and inspect the spark plug. If the electrode is fouled,clean or replace it with new one
．
(3) Remove the spark plug and connect it to the plug cap. Pull the starter handle while grounding
spark plug against engine body. Try with a new spark plug if the spark is weak or there is no spark.
The ignition system is faulty if there is no spark with a new spark plug.
WARNING!
• Wipe out spilled fuel carefully before testing
.
Place spark plug as far away from spark plug hole as
possible.
• Do not hold spark plug by hand while pulling recoil starter.
NOTE:
The engine with oil sensor will stop automatically when the oil level falls below the prescribed
limit. Unless the oil level is raised above the prescribed limit
,
the engine will stop immediately after
starting.
3. Is there enough compression? (See Fig. 10-3)
Pull the starter handle slowly and check if resistance is felt. If little force is required to pull the
starter handle,check if the spark plug is tightened firmly.If the spark plug is loose, tighten it.
4. Is the spark plug wet with gasoline? (See Fig. 10-4)
(1) Is the fuel cock open?
(2) Choke (close choke lever) and pull the starter handle five or six times.Remove the plug and check
if its electrode is wet
．
If the electrode is wet, fuel is well supplied to your engine.
(3) When the electrode is dry,check where the fuel stops
.
(Check the fuel intake of the carburetor
and fuel strainer intake.)
(4) In case the engine does not start with well supplied fuel
,
try using fresh fuel.
