OPERATOR'S
MANUAL
and MAINTENANCE INSTRUCTIONS for
TECUMSEH
MODELS
HSK35,40, HSSK50
SNOW BLOWER ENGINE
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:
FAST |
SLOW |
STOP |
OFF |
FULL IGNITION KEY INSERT TO RUN REMOVE TO STOP |
CHOKE
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.
SPARK PLUG WIRE
SPARK PLUG
MUFFLER
CARBURETOR
COVER
CHOKE 
IGNITION KEY OR IGNITION SWITCH (IF SO EQUIPPED)
OIL DRAIN PLUG
3-1-00 181-637-14
OIL FILL PLUG AND
DIPSTICK
FUEL FILL CAP
FUEL TANK
MODEL AND
D.O.M. DECAL
PRIMER
STARTER
HANDLE
FUEL
VALVE
RECOIL
STARTER
CHOKE
OIL DRAIN PLUG (IF SO EQUIPPED)
HSSK50 |
MUFFLER |
HSK35-40
Figure 1 |
181-637-14 |
Page 1 |
ENGINES WHICH ARE CERTIFIED TO COMPLY WITH CALIFORNIA AND U.S. EPA EMISSION REGULATIONS FOR ULGE ENGINES: Are certified to operate on regular unleaded gasoline. Include the following emission control system(s): EM, TWC (if so equipped); Do not include any user adjustable features - therefore no other adjustments are needed.
OIL & FUEL RECOMMENDATIONS
TO OPERATE ENGINE, YOU WILL NEED THE FOLLOWING:
À A CLEAN, HIGH QUALITY DETERGENT OIL.
Be sure original container is marked: A.P.I. service "SF" - "SJ".
FOR SUMMER (ABOVE 320F; 00C) 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; 00C) 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; -180C ONLY): SAE 0W30 is an acceptable substitute.
DO NOT USE SAE 10W40 OIL.
OIL SUMP CAPACITY: 21 ounces (1-1/4 U.S. pints)
.62 liter
Á 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”), or up to 15 MTBE (Methyl Tertiary Butyl Ether), 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.
BEFORE STARTING
ÀREAD ALL INSTRUCTIONS PROVIDED WITH THE EQUIPMENT ON WHICH THIS ENGINE IS USED.
BEFORE STARTING (Continued)
ÂFILL FUEL TANK:
A.Clean area around fuel fill cap, remove cap.
B.Add “UNLEADED” regular gasoline, slowly, to fuel tank. Use a funnel to prevent 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.
à 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:
-Ignition switch on engine or equipment is in “ON”, “RUN” or “START” position.
OR
-Ignition key (if so equipped see Figure 2) is inserted into ignition keyslot in carburetor cover (see Figure 1).
DO NOT TURN IGNITION KEY.
D.Be sure fuel valve is open (see Figure 3).
ENGINE WILL NOT START
UNLESS IGNITION KEY IS
INSERTED INTO IGNITION
KEYSLOT IN CARBURTER
COVER.
DO NOT TURN IGNITION KEY
IGNITION KEY
Figure 2
ÁTO 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.
-Oil fill plug is tightened securely into oil fill tube or hole.
CHECK OIL LEVEL OFTEN DURING ENGINE BREAK-IN.
A.POSITION EQUIPMENT SO ENGINE IS LEVEL.
B.Clean area around oil fill plug (see Figure 1).
C.Remove oil fill plug and dipstick.
D.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.
E.Install oil fill plug and dipstick, tighten securely.
See “MAINTENANCE” section for further oil instructions. |
Page 2 |
FUEL VALVE |
|
TURN CLOCKWISE TO |
|
"OFF" POSITION |
|
|
|
|
"OPEN" POSITION SHOWN |
|
|
Figure 3
181-637-14
STARTING
NEVER RUN ENGINE INDOORS OR IN ENCLOSED, 
POORLY VENTILATED AREAS. ENGINE EXHAUST
CONTAINS CARBON MONOXIDE, AN ODORLESS AND DEADLY GAS (CARBON MONOXIDE IS ALSO PRESENT IN ENGINE EXHAUST FROM LIQUID PETROLEUM (LPG) AND NATURAL GAS FUEL SYSTEMS).
KEEP HANDS, FEET, HAIR AND LOOSE CLOTHING AWAY FROM ANY MOVING PARTS ON ENGINE AND EQUIPMENT. NEVER LEAVE EQUIPMENT UNATTENDED WHEN ENGINE IS OPERATING.
WARNING - TEMPERATURE OF MUFFLER AND NEARBY AREAS MAY EXCEED 1500F (650C). AVOID THESE AREAS.
ÀRECOIL STARTER (see Figure 1):
A.Move equipment control (see equipment manufacturer’s instructions) or engine control lever to “FAST” or “START” position.
B.Move engine choke to “FULL”.
NOTE: IF RESTARTING A WARM ENGINE AFTER A SHORT SHUTDOWN:
1.MOVE CHOKE TO “OFF” INSTEAD OF “FULL”.
2.DO NOT USE PRIMER.
C.Push primer three (3) times (see Figure 4). Always cover vent hole when pushing primer. See warm engine restart “NOTE” above.
D.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 RECOIL STARTER is frozen and will not crank engine, proceed as follows:
1.Pull as much rope out of starter as possible.
2.Release starter handle and let it snap back against starter.
NOTE: The above should be done only when necessary to free a frozen starter.
E.If engine fails to start after 3 pulls, repeat instructions C - E as necessary, until engine starts.
F.When engine starts, move choke gradually to “OFF”.
G.If engine falters, move choke immediately to “FULL” and then gradually to “OFF”.
STARTING (Continued)
Á ELECTRIC STARTER (see Figure 5)
WARNING: THE 120V A.C. STARTER IS EQUIPPED WITH A THREEWIRE POWER CORD AND PLUG, AND IS DESIGNED TO OPERATE ON 120V A.C. HOUSEHOLD CURRENT. THE STARTER MUST BE PROPERLY GROUNDED AT ALL TIMES TO AVOID THE POSSIBILITY OF INJURY OR DEATH FROM ELECTRICAL SHOCK. DETERMINE THAT YOUR HOUSE WIRING IS A GROUND FAULT INTERRUPTED (G.F.I.) THREE-WIRE GROUNDED SYSTEM, OR ASK A LICENSED ELECTRICIAN IF YOUR ARE NOT SURE. IF YOUR HOUSE WIRING SYSTEM IS NOT A G.F.I. THREE-WIRE GROUNDED SYSTEM, DO NOT USE THIS ELECTRIC STARTER UNDER ANY CONDITION. IF YOUR HOUSE WIRING SYSTEM IS GROUNDED BUT A G.F.I. THREE-PRONG WALL RECEPTACLE IS NOT AVAILABLE AT THE LOCATION YOUR STARTER WILL BE USED, ONE SHOULD BE INSTALLED BY A LICENSED ELECTRICIAN.
NOTE: If your engine is equipped with a 12V battery-operated electric starter, disregard instructions regarding power cord.
A.Connect power cord to switchbox on engine.
B.Plug other end of power cord (see Figure 5) into wall receptacle.
IMPORTANT: When connecting power cord, always connect power cord to switch box on engine first; then into wall receptacle.
C.Move equipment control (see equipment manufacturer’s instructions) or engine control lever to “FAST” or “START” position.
D.Move engine choke to “FULL”.
E.Push primer three times, making sure to cover vent hole when pushing (see Figure 4).
NOTE: If restarting a warm engine after a short shutdown:
1.Leave choke in "OFF" position.
2.Push primer one time only.
F.Push starter button (see Figure 5) or turn ignition switch key (see equipment manufacturer’s instructions) to crank engine.
G.When engine starts, release starter button and move choke gradually to “OFF”.
H.If engine falters, move choke immediately to “FULL” and then gradually to “OFF”.
I.Disconnect power cord (see Figure 5) from wall receptacle first, and then from switchbox on engine.
IMPORTANT: When disconnecting power cord, always unplug wall receptacle end first; then unplug switchbox on engine.
NOTE: The electric starter is thermally protected. If overheated, it will stop automatically and can be restarted only when it has cooled to a safe temperature (a wait of approximately 5-10 minutes is required).
If, after following the preceding instructions, the engine does not start, have it checked by your Authorized Tecumseh Service Outlet.
VENT HOLE
Figure 4
TO OUTLET
SWITCHCORD |
Ù |
TO STARTER |
|
SWITCHBOX
STARTER
BUTTON
POWERCORD
Ù |
120V A.C. APPLICATION |
|
Figure 5
Page 3 |
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