Tecumseh OHH45, OHH50, OHH55, OHH60, OHH65 Operator's Manual
OPERATOR'SOPERATOR'S
MANUALMANUAL
and MAINTENANCE INSTRUCTIONS for
TECUMSEHTECUMSEH
MODELS
OHH45, OHH50,
OHH55, OHH60, OHH65
HORIZONTAL CRANKSHAFT
AIR COOLED
FOUR-CYCLE ENGINE
THIS SYMBOL POINTS OUT IMPORTANT SAFETY INSTRUCTIONS WHICH IF NOT FOLLOWED COULD ENDANGER
THE PERSONAL SAFETY AND/OR PROPERTY OF YOURSELF AND OTHERS. READ AND FOLLOW ALL
INSTRUCTIONS IN THIS MANUAL AND ANY PROVIDED WITH THE EQUIPMENT ON WHICH THIS ENGINE IS USED
BEFORE ATTEMPTING TO OPERATE YOUR TECUMSEH ENGINE.
THESE SYMBOLS MAY APPEAR
ON THE ENGINE:
California Proposition 65 WARNING: The engine exhaust from this product contains chemicals
known to the State of California to cause cancer, birth defects or other reproductive harm.
NOTE: Engines which are certified to comply with California and U.S. EPA
emission regulations for SORE (Small Off Road Equipment), are certified
to operate on regular unleaded gasoline, and include the following emission
control systems: Engine Modification (EM), and Three-way Catalyst
(TWC) (if so equipped).
OIL & FUEL RECOMMENDATIONS
TO OPERATE ENGINE, YOU WILL NEED THE FOLLOWING:
ÀÀ A CLEAN, HIGH QUALITY DETERGENT OIL.
Be sure original container is marked:
A.P.I. service SF-SJ.
FOR SUMMER (ABOVE 320F) USE SAE 30 OIL.
Tecumseh specially formulated oil is available at any Authorized
Tecumseh Service Outlet. Order as part number 730225.
Using multigrade oil will increase oil consumption.
FOR WINTER (BELOW 320F) USE SAE 5W30 OIL.
Tecumseh specially formulated oil is available at any Authorized
Tecumseh Service Outlet. Order as part number 730226.
(SAE 10W is an acceptable substitute.)
(BELOW 00F ONLY):SAE 0W30 OIL is an acceptable substitute.
DO NOT USE SAE 10W40 OIL.
OIL SUMP CAPACITY: 21 ounces (1-1/4 U.S. pints) .62 liter.
MODEL AND
D.O.M. DECAL
MUFFLER
STOP
3-1-00 181-1032-14
The D.O.M. decal also includes engine life specifications for the
emissions-related useful life period of your engine. This period
relates to the emission compliance life as certified by EPA/CARB.
To find the life period specification for your engine, please match
one of the following letters with the letter printed on your D.O.M.
decal: (C):125 hours, (B) 250 hours, (A) 500 hours.
OIL FILL
AND DIPSTICK
SPARK PLUG
FUEL TANK
FUEL CAP
RECOIL
STARTER
ÁÁ A FRESH, CLEAN, UNLEADED REGULAR, UNLEADED
PREMIUM OR REFORMULATED AUTOMOTIVE
GASOLINE ONLY. DO NOT USE LEADED GASOLINE.
NOTE: DO NOT USE GASOLINE CONTAINING METHANOL (WOOD
ALCOHOL). Gasoline containing up to 10% ethanol or grain alcohol
(“Gasohol”) may be used but requires special care when engine is
unused for extended periods. See “STORAGE” instructions on Page
5.
NOTE: Use clean oil and fuel and store in approved, clean, covered
containers. Use clean fill funnels.
Never use “stale” gasoline left over from last season or stored
for long periods.
PRINTED IN U.S.A. Page 1 181-1032-14
PRIMER
CARBURETOR
AIR
CLEANER
SPEED
CONTROL
OIL DRAIN
PLUG
Figure 1
AIR INTAKE
STARTER HANDLE
OIL FILL
PLUG
BEFORE STARTING
ÀÀ READ ALL INSTRUCTIONS PROVIDED WITH THE EQUIPMENT
ON WHICH THIS ENGINE IS USED.
ÁÁ FILL OIL SUMP OR CHECK OIL LEVEL:
IMPORTANT: To avoid engine damage never run engine unless:
- Oil level is between “FULL” and “ADD” marks on dipstick (if so
equipped).
- Oil level is to overflow point in oil fill hole on engine without a
dipstick.
- Oil fill plug is tightened securely into oil fill tube or hole.
CHECK OIL LEVEL OFTEN DURING ENGINE BREAK-IN.
A. ENGINE WITHOUT DIPSTICK:
1. POSITION EQUIPMENT SO ENGINE IS LEVEL.
2. Clean area around oil fill plug (see Figure 1).
3. Remove oil fill plug.
4. If oil level is not up to overflow point in oil fill hole, add
recommended oil. POUR SLOWLY.
5. Install oil fill plug, tighten securely.
B. ENGINE WITH DIPSTICK:
1. POSITION EQUIPMENT SO ENGINE IS LEVEL.
2. Clean area around oil fill plug (see Figure 1).
3. Remove oil fill plug and dipstick.
4. Wipe dipstick clean, insert it into oil fill hole and tighten
securely, remove dipstick. If oil is not up to “FULL” mark
on dipstick, add recommended oil. POUR SLOWLY.
Wipe dipstick clean each time oil level is checked.
IMPORTANT: DO NOT FILL ABOVE “FULL” MARK ON
DIPSTICK.
5. Install oil fill plug and dipstick, tighten securely.
See “MAINTENANCE” section for further oil instructions.
ÂÂ FILL FUEL TANK:
A. Clean area around fuel fill cap, remove cap.
B. Add “UNLEADED” regular gasoline, slowly, to fuel tank. Use
a funnel to help avoid spillage.
IMPORTANT: NEVER MIX OIL WITH GASOLINE
C. Install fuel fill cap and wipe up any spilled gasoline.
NEVER FILL FUEL TANK INDOORS. NEVER FILL FUEL
TANK WHEN ENGINE IS RUNNING OR HOT. DO NOT
SMOKE WHEN FILLING FUEL TANK.
NEVER FILL FUEL TANK COMPLETELY. FILL TANK TO 1/
2'’ BELOW BOTTOM OF FILLER NECK TO PROVIDE
SPACE FOR FUEL EXPANSION. WIPE ANY FUEL
SPILLAGE FROM ENGINE AND EQUIPMENT BEFORE
STARTING ENGINE.
ANY LIQUEFIED PETROLEUM (LPG) OR NATURAL GAS
FUEL SYSTEM MUST BE LEAKPROOF AND MEET ALL
APPLICABLE CODES AND REGULATIONS.
FUEL TANK
BEFORE STARTING (Continued)
ÃÃ CHECK THE FOLLOWING:
A. BE SURE EQUIPMENT IS IN NEUTRAL GEAR WITH
CLUTCHES, BELTS, CHAINS AND SAFETY SWITCHES
DISENGAGED. (FOLLOW EQUIPMENT MANUFACTURER’S INSTRUCTIONS.) THIS SHOULD PLACE ANY SAFETY SWITCHES IN SAFE STARTING POSITION.
B. Be sure spark plug wire is attached to spark plug (see Figure
1).
C. Be sure any ignition switch and/or control lever on engine or
equipment is in “ON”, “RUN” or “START” position.
D. Be sure fuel valve (if so equipped see Figure 2) is open.
STARTING
NEVER RUN ENGINE INDOORS OR IN ENCLOSED, POORLY
VENTILATED AREAS. ENGINE EXHAUST CONTAINS CARBON
MONOXIDE, AN ODORLESS AND DEADLY GAS.
KEEP HANDS, FEET, HAIR AND LOOSE CLOTHING AWAY
FROM ANY MOVING PARTS ON ENGINE AND EQUIPMENT.
WARNING TEMPERATURE OF MUFFLER AND NEARBY
AREAS MAY EXCEED 1500F (650C). AVOID THESE AREAS.
À RECOIL STARTER (with primer):
A. Move equipment control (see manufacturer's instructions) or
engine control to "START".
B. Push primer two (2) or three (3) times (see Figure 3). Wait
about two (2) seconds between each push. In cold weather
(500F/100C or below) push five (5) times.
NOTE: PRIMER MAY BE NEEDED TO RESTART A WARM
ENGINE AFTER A SHORT SHUTDOWN.
C. Grasp starter handle (see Figure 1) and pull rope out, slowly,
until it pulls slightly harder. Let rope rewind slowly. Then pull
rope with a rapid full arm stroke. Let rope return to starter
slowly.
NOTE: If engine fails to start after three (3) pulls, push
primer two (2) times and pull starter rope again.
Á RECOIL STARTER (with choke):
A. Move choke lever to “FULL CHOKE POSITION.”
NOTE: IF RESTARTING A WARM ENGINE AFTER A
SHORT SHUTDOWN, MOVE CHOKE LEVER TO
“NO CHOKE POSITION.”
B. Move equipment control (see manufacturer’s instructions) or
engine control to “START”.
C. Grasp starter handle (see Figure 1) and pull rope out, slowly,
until it pulls harder. Let rope rewind slowly. Then pull rope
with a rapid full arm stroke. Let rope return to starter slowly.
D. When engine starts, move choke lever to “1/2 CHOKE” until
engine runs smoothly and then to “NO CHOKE POSITION.”
If engine falters, move choke lever to “1/2 CHOKE” until
engine runs smoothly and then to “NO CHOKE POSITION.”
NOTE: If engine fails to start after three (3) pulls, move
choke lever to “NO CHOKE POSITION” and pull
starter rope again.
NOTE: If engine fires, but does not continue to run, move
choke lever to “FULL CHOKE” and repeat
instructions B, C and D until engine starts.
FUEL VALVE
"OPEN" POSITION
SHOWN
TURN CLOCKWISE
TO "OFF" POSITION
Page 2 181-1032-14Figure 2
Page 3 181-1032-14
STARTING (Continued)
ÂÂ ELECTRIC STARTER (with choke):
A. Move choke lever to “FULL CHOKE POSITION.”
NOTE: IF RESTARTING A WARM ENGINE AFTER A SHORT
SHUTDOWN, MOVE CHOKE LEVER TO “NO CHOKE
POSITION.”
B. Move equipment control (see manufacturer’s instructions) or
engine control to “START”.
C.Push starter button or turn ignition switch key (see equipment
manufacturer’s instructions) to crank engine.
D.Crank engine until it fires. When it starts, release starter button
or ignition switch key and move choke lever to “1/2 CHOKE”
until engine runs smoothly and then to “NO CHOKE POSITION.”
If engine falters, move choke lever to “1/2 CHOKE” until engine
runs smoothly and then to “NO CHOKE POSITION.”
NOTE: If engine fires, but does not continue to run, move
choke lever to “NO CHOKE POSITION’’ and crank
engine until it starts.
NOTE: If engine again fires, but does not continue to run,
move choke lever to “FULL CHOKE” and repeat
instructions B, C and D until engine starts.
ÃÃ ELECTRIC STARTER (with primer):
A. Move equipment control (see manufacturer's instructions)
or engine control to "START".
B. Push primer two (2) or three (3) times (see Figure 3). Wait
about two (2) seconds between each push. In cold weather
(500F/100C or below) push five (5) times.
NOTE: PRIMER MAY BE NEEDED TO RESTART A WARM
ENGINE AFTER A SHORT SHUTDOWN.
C.Push starter button or turn ignition switch key (see equipment
manufacturer’s instructions) to crank engine.
D.Crank engine until it fires. When it starts, release starter button
or ignition switch key .
NOTE: If engine does not start after about (5) seconds of
cranking, stop cranking, push primer two (2) times
and crank engine again.
STOPPING
ÀÀ Move equipment control or any ignition stop switch on engine to
“STOP” or “OFF” (see equipment manufacturer’s instructions).
ÁÁ AFTER ENGINE IS STOPPED:
A. Close fuel valve (if so equipped).
B. DISCONNECT SPARK PLUG WIRE FROM SPARK PLUG
AND KEEP IT AWAY FROM SPARK PLUG.
C. TURN IGNITION SWITCH KEY (IF SO EQUIPPED) TO
“OFF” POSITION AND REMOVE KEY FROM SWITCH,
THIS WILL REDUCE THE POSSIBILITY OF
UNAUTHORIZED STARTING OF ENGINE WHILE
EQUIPMENT IS NOT IN USE.
NEVER STORE ENGINE WITH FUEL IN TANK INDOORS
OR IN ENCLOSED, POORLY VENTILATED AREAS,
WHERE FUEL FUMES MAY REACH AN OPEN FLAME,
SPARK OR PILOT LIGHT AS ON A FURNACE, WATER
HEATER, CLOTHES DRYER OR OTHER GAS APPLIANCE.
MAINTENANCE
WARNING: TEMPERATURE OF MUFFLER AND NEARBY
AREAS MAY EXCEED 1500F (650C). AVOID THESE AREAS.
ÀÀ OIL LEVEL:
Check oil level every five (5) operating hours and before each
use. See “FILL OIL SUMP OR CHECK OIL LEVEL’’ on Page 2.
ÁÁ CHANGE OIL:
Change oil after first two (2) operating hours and every 50
operating hours thereafter, more often if operated in extremely
dusty or dirty conditions. Change oil while engine is still warm
from recent running.
A. DISCONNECT SPARK PLUG WIRE FROM SPARK PLUG
AND KEEP IT AWAY FROM SPARK PLUG.
B. Clean area around oil drain plug (see Figure 1).
C. Position equipment so engine oil drain plug is lowest point
on engine.
D. Remove oil drain plug and oil fill plug to drain oil.
E. Install oil drain plug and tighten securely.
F. Fill oil sump with recommended oil. See “OIL & FUEL
RECOMMENDATIONS’’ on Page 1 and “FILL OIL SUMP OR
CHECK OIL LEVEL” on Page 2.
G. Install oil fill plug and tighten securely.
H. Wipe up any spilled oil.
ÂÂ COOLING SYSTEM (see Figure 1 and 4):
IMPORTANT: Frequently remove grass clippings, dirt and debris
from cooling fins, air intake screen and levers and linkage. This
will help ensure adequate cooling and correct engine speed.
PRIMER BUTTON
Figure 3
COOLING FINS
RECOIL
COVER
LEVERS AND
LINKAGE
NOTE: RECOIL COVER CUTAWAY TO SHOW COOLING FINS
Figure 4
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