Document Outline

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• H30-40
  • Four-Cycle Engine . Horizontal Crankshaft . Air-Cooled
• 181-789-14
  • (English) 1/01/08
    • IMPORTANT NOTICE!
    • Safety Definitions
    • Notice Regarding Emissions
    • Tecumseh Contact Information
      • I. General Safety Precautions
      • A. Avoid Carbon Monoxide Poisoning
      • B. Avoid Gasoline Fires
      • C. Adult Supervision of Operation, Refueling and Maintenance
      • D. Stay Away from Rotating Parts
      • E. Do Not Modify Engine
      • F. Avoid Burns and Fire from Hot Surfaces
      • G. Avoid Accidental Starts
      • H. Use Hearing Protection
        • Figure 1. DO NOT Use Without Engine Shaft Guard
          • 1. Muffler Guard
          • 2. Flywheel Guard
        • Figure 2. Typical Engine Guard Locations
        • Figure 3. Disconnecting/Connecting Spark Plug
        • Figure 4. Typical Spark Plug Connection
        • II. How to Get Service
      • A. Engine Identification Decal
      • B. Tecumseh Technician’s Handbooks
        • III. Oil and Fuel Specifications
      • A. Oil
        • Figure 5. Engine Identification Label
        • Figure 6. Technician’s Handbook
        • Table 1. Recommended Engine Oil
      • B. Fuel
        • IV. Before Starting Your Engine
      • A. Checking Oil Level
        • Table 2. Recommended Fuel
    • 10%
    • 10%
    • 15%
    • 15%
      • Figure 7. Engine Oil Level
      • B. Filling Oil Sump
        • I. Oil Fill Cap With Dipstick
          • 1. Be sure engine is upright and level.
          • 2. Unscrew oil fill cap from oil filler tube and wipe dipstick clean. See Figure 8.
          • 3. Screw oil fill cap back into oil filler tube. Tighten securely.
          • 4. Unscrew and remove oil fill cap from oil filler tube. Note oil level. If oil reading on dipstick is below “ADD” mark, slowly add oil to reach “FULL” level. See Figure 7.
          • 5. Screw oil fill cap back into oil filler tube. Tighten securely.
          • 6. Wipe away any spilled oil.
        • II. Oil Fill Cap Without Dipstick (Oil Fill Plug)
          • 1. Be sure engine is upright and level.
          • 2. Clean area around oil fill plugs. See Figure 9.
          • 3. Unscrew oil fill plug.
          • 4. Add oil to overflow point, making sure to avoid spilling.
          • 5. Screw oil fill plug back into oil fill hole. Tighten securely.
          • 6. Wipe away any spilled oil.
      • C. Engine Stop Switch
        • 1. Oil Fill Plug
        • 2. Carburetor
        • 3. Air Cleaner
        • 4. Muffler
        • 5. Muffler Guard
        • 6. Optional Extended Oil Fill Cap
        • 7. Spark Plug Cap
        • 8. Fuel Fill Cap
        • 9. Optional On/Off Switch
        • 10. Starter Cord Handle
        • Figure 8. Engine Components
      • D. Filling Fuel Tank
        • 1. Stop engine and allow it to cool before refueling.
        • 2. Be sure engine is outdoors and in a well-ventilated area.
        • 3. Clean area around fuel fill cap and remove fuel fill cap. See Figure 8.
        • 4. Using an approved red GASOLINE container, add fuel slowly, being careful to avoid spilling. DO NOT overfill fuel tank. Leave space in the tank to allow fuel to expand without overflowing.
        • 5. Replace anti-splash fuel fill cap securely and wipe up spilled fuel before starting engine. If fuel is spilled DO NOT start engine. Move machine away from area of spillage. Avoid creating any source of ignition until fuel vapors are gone.
        • 6. Be sure fuel valve (optional) is open. See Figure 12.
        • V. Starting Your Engine
          • Figure 9. Oil Fill Plug Locations
          • Figure 10. Fuel Cap Insert Symbol
          • Figure 11. Possible Anti-Splash Fuel Fill Cap(s)
          • Figure 12. Fuel Valve Positions
      • A. Engines with Electric Starters
        • Table 3. Engine Sections with Electric Starter
        • I. Engine With Primer Bulb
          • 1. To avoid carbon monoxide poisoning, ensure engine is outdoors in a well-ventilated area.
          • 2. Be sure fuel valve (optional) is open and all switches are on. See Figure 13.
          • 3. Move Equipment Control (see equipment manufacturer’s instructions) or Engine Throttle Control to “FAST” position or “HIGH” position. See Figures 14 and 15.
          • 4. When starting a cold engine, push primer bulb firmly with your thumb 3 times, allowing primer bulb to return completely to original position between pushes. See Figure 16.
          • 5. Push starter button or turn ignition switch key (see equipment manufacturer’s instructions) to start engine.
          • 6. When engine starts, release starter button or ignition switch key.
          • 7. If engine fails to start after 3 attempts, repeat steps 2 thru 6 and try again.
          • 8. If engine does not start after following steps 1 thru 7, contact your Authorized Tecumseh Servicing Dealer. DO NOT attempt to start or troubleshoot this engine in any other way.
          • Figure 13. Optional Fuel Valve Positions
          • Figure 14. Typical Engine Symbols
            • 1. High Speed
            • 2. Low Speed
            • 3. Stop
          • Figure 15. Engine Speed Control Levers
          • Figure 16. Primer Bulb
        • II. Engine With Choke
          • 1. To avoid carbon monoxide poisoning, make sure engine is outdoors in a well-ventilated area.
          • 2. Be sure fuel valve (optional) is open and all switches are on. See Figure 18.
          • 3. Move Equipment Control (see equipment manufacturer’s instructions) or Engine Throttle Control to “FAST” position or “HIGH” position and set Choke Control to “FULL” position. See Figures 17, 19, and 20.
          • 4. Push starter button or turn ignition switch key (see equipment manufacturer’s instructions) to start engine.
          • 5. When engine starts:
            • a. Release starter button or ignition switch key.
            • b. Momentarily move Choke Control to “1/2 CHOKE” position until engine runs smoothly. See Figures 17.
            • c. Next, move Choke Control to “NO CHOKE” position.
          • 6. Move Engine Speed Control to desired speed in “RUN” range. See Figures 19 and 20.
            • a. Momentarily move Choke Control back to “FULL CHOKE” position. See Figure 17.
            • b. Next, move Choke Control to “1/2 CHOKE” until engine runs smoothly.
            • c. Finally, move Choke Control to “NO CHOKE” position.
          • 1. No Choke Position
          • 2. 1/2 Choke Position
          • 3. Full Choke Position
          • Figure 17. Choke Control Positions
          • Figure 18. Optional Fuel Valve Positions
            • 7. If engine fires but does not continue to run, move Choke Control to “NO CHOKE” position and start engine.
            • 8. If engine fails to start after 3 attempts in the “NO CHOKE” position, move Choke Control to “FULL CHOKE” position and start engine.
            • 9. If engine does not start after following steps 1 thru 8, contact your Authorized Tecumseh Servicing Dealer. DO NOT attempt to start or troubleshoot this engine in any other way.
      • B. Engines with Recoil Starters
        • Table 4. Engine Sections with Recoil Starter
        • I. Engine With Primer Bulb
          • 1. To avoid carbon monoxide poisoning, ensure engine is outdoors in a well-ventilated area.
          • 2. Be sure fuel valve (optional) is open and all switches are on. See Figure 18.
          • 3. Move Equipment Control (see equipment manufacture’s instructions) or Engine Throttle Control to “FAST” position or “HIGH” position. See Figure 19 or 20.
          • 4. When starting a cold engine, push primer bulb firmly with your thumb 3 times, allowing primer bulb to return completely to original position between pushes. See Figure 21.
          • 5. Grasp starter cord handle. See Figure 22.
            • a. Pull rope out slowly until you feel drag.
            • b. Next, pull rope with one rapid full arm stroke.
            • c. Return rope slowly to original position.
          • 6. If engine fails to start after 3 attempts, repeat steps 2 thru 5 and try again.
          • 7. If engine does not start after following steps 1 thru 6, contact your Authorized Tecumseh Servicing Dealer. DO NOT attempt to start or troubleshoot this engine in any other way.
          • Figure 19. Typical Engine Symbols
            • 1. High Speed
            • 2. Low Speed
            • 3. Stop
          • Figure 20. Engine Speed Control Levers
          • Figure 21. Primer Bulb
          • Figure 22. Starter Cord Handle
        • II. Engine With Choke
          • 1. To avoid carbon monoxide poisoning, ensure engine is outdoors in a well-ventilated area.
          • 2. Be sure fuel valve (optional) is open and all switches are on. See Figure 23.
          • 3. Move Equipment Control (see equipment manufacturer’s instructions) or Engine Throttle Control to “FAST” position or “HIGH” position and set Choke Control to “FULL” position. See Figures 24, 25 and 26.
          • Figure 23. Optional Fuel Valve Positions
          • Figure 24. Typical Engine Symbols
            • 1. High Speed
            • 2. Low Speed
            • 3. Stop
          • Figure 25. Engine Speed Control Levers
            • 4. Grasp starter cord handle. See Figure 27.
              • a. Pull rope out slowly until you feel drag.
              • b. Next, pull rope with one rapid full arm stroke.
              • c. Return rope slowly to original position.
            • 5. When engine starts:
              • a. Momentarily move Choke Control “1/2 CHOKE” position until engine runs smoothly. See Figure 26.
              • b. Next, move Choke Control to “NO CHOKE” position.
            • 6. Move Engine Speed Control to desired speed in “RUN” range. See Figures 24 and 25.
              • a. Momentarily move Choke Control back to “FULL CHOKE” position. See Figure 26.
              • b. Next, move Choke Control to “1/2 CHOKE” position until engine runs smoothly.
              • c. Finally, move Choke Control to “NO CHOKE” position.
            • 7. If engine fires but does not continue to run, move Choke Control to “NO CHOKE” position and start engine.
            • 8. If engine fails to start after 3 attempts in the “NO CHOKE” position, move Choke Control to “FULL CHOKE” position and start engine.
            • 9. If engine does not start after following steps 1 thru 8, contact your Authorized Tecumseh Servicing Dealer. DO NOT attempt to start or troubleshoot this engine in any other way.
            • 1. No Choke Position
            • 2. 1/2 Choke Position
            • 3. Full Choke Position
          • Figure 26. Choke Control Positions
          • Figure 27. Recoil Starter Handle
          • VI. Stopping Your Engine and Short-Term Storage
          • VII. Maintenance
      • A. Checking and Changing Oil
        • 1. Be sure you find the correct drain plug location, if provided. See Figures 30, 31 and 32.
        • 2. Disconnect spark plug wire and keep it away from spark plug. See “G. Avoid Accidental Starts” instructions on page 2. See Figures 28 and 29.
        • Figure 28. Disconnecting/Connecting Spark Plug
        • Figure 29. Typical Spark Plug Connection
          • 3. Be sure the gas cap is on and is tightened securely. See Figures 30, 31 and 32.
          • 4. Clean area around oil drain plug. See Figures 30, 31 and 32.
          • 5. Place approved recyclable oil container under oil drain plug, tipping engine to position the oil drain plug at the lowest point on the engine. (See equipment manufacturer’s instructions).
          • 6. Remove oil drain plug and drain oil. See Figures 30, 31 and 32.
          • 7. Install oil drain plug and tighten securely.
          • 8. Fill with recommended oil. See “III. Oil and Fuel Specifications” instructions on page 3. See Table 1 on page 3 and Table 2 on page 4.
          • 9. Wipe away any spilled oil.
          • 10. Carefully disconnect spark plug wire from grounding post, if provided.
          • 11. Carefully re-connect spark plug wire to spark plug. See Figures 28 and 29.
          • 1. Spark Plug Cap
          • 2. Fuel Fill Cap
          • 3. Oil Fill Plug
          • 4. Optional Oil Drain
        • Figure 30. Compact Model Component Locations
          • 1. Optional Extended Oil Fill Cap and Dipstick
          • 2. Spark Plug Cap
          • 3. Fuel Fill Cap
          • 4. Oil Fill Cap
          • 5. Optional Oil Drain
        • Figure 31. Standard Model Component Locations
          • 1. Oil Drain Plug
          • 2. Oil Fill Cap and Dipstick
          • 3. Optional Oil Fill Plug
        • Figure 32. Oil Drain/Fill Locations
      • B. Removing Debris from Engine
      • C. Spark Plug
        • 1. Clean area around spark plug.
        • 2. Remove and inspect spark plug.
        • 3. Replace spark plug if porcelain is cracked or if electrodes are:
        • 4. Check electrode gap with wire feeler gauge and set gap to .030 (0.76mm) if necessary. See Figure 34.
        • 5. Install spark plug and tighten securely.
      • D. Cleaning/Replacing Air Cleaner
        • 1. Levers and Linkage
        • 2. Air Intake Screen
        • 3. Muffler Guard
        • 4. Cooling Fins
        • Figure 33. Debris Removal Areas
          • 1. .030 (0.76 mm) Gap
          • 2. Electrodes
          • 3. Porcelain
        • Figure 34. Resistor Spark Plug
        • I. Servicing Foam Filters
          • 1. Wash in warm water and detergent solution then press (DO NOT twist) until all dirt is removed.
          • 2. Rinse thoroughly until water is clear.
          • 3. Wrap in a clean cloth and press (DO NOT twist) until completely dry.
          • 4. Replace foam pre-filter onto paper filter.
        • II. Servicing Paper Filters
          • 1. Loosen cover screws. See Figure 35.
          • 2. Turn cover counterclockwise and remove from base.
          • 3. Remove optional foam filter (if present) from paper filter.
          • 4. Remove paper/metal filter from base.
          • 5. Clean inside of base and cover thoroughly.
          • 6. Install new paper/metal element into base.
          • 7. Install optional foam filter onto paper filter.
          • 8. Turn cover clockwise and attach to base.
          • 9. Install cover screws and tighten securely.
          • 1. Turn cover to left (counterclockwise) and remove it and paper filter from flange. See Figure 36.
          • 2. Discard filter.
          • 3. Clean cover and flange thoroughly.
          • 4. Install new paper filter into cover.
          • 5. Position cover and filter against flange with tab on cover inserted into lower left corner of slot in flange.
          • 6. Push cover firmly against flange and turn to right (clockwise) as far as it will go.
          • 7. Be sure retainers are locked around flange.
      • E. Adjustments
        • 1. Base
        • 2. Cover Screws
        • 3. Paper/Metal Filter
        • 4. Optional Foam Filter
        • 5. Cover
        • Figure 35. Air Cleaner Type “A” Assembly
          • 1. Retainer
          • 2. Slot
          • 3. Flange
          • 4. Paper Filler
          • 5. Tab
          • 6. Cover
        • Figure 36. Air Cleaner Type “B” Assembly
      • F. Carburetor
      • G. Engine Speed
        • VIII. Transporting Your Engine
          • 1. Empty fuel tank by using a commercially available suction device designed for use with gasoline.
          • 2. Drain fuel into an approved red GASOLINE container, being careful to avoid spilling.
          • 3. Run the engine until remaining fuel is consumed.
        • IX. Storing Your Engine
      • A. Short Term/Seasonal Storage
        • I. Clean Engine
        • II. Fuel Storage
        • III. Fuel System
        • IV. Fuel Treatment
          • 1. Add fuel stabilizer according to manufacturer’s instructions.
          • 2. Run engine at least 10 minutes after adding stabilizer to allow it to reach carburetor.
      • B. Extended Storage
        • I. Draining Fuel
          • 1. To prevent serious injury from fuel fires, empty fuel tank by running engine until it stops from lack of fuel. DO NOT attempt to pour fuel from engine.
          • 2. Run the engine while waiting until the remaining fuel is consumed.
          • 3. Begin servicing the cylinder bore. See "II. Oil Cylinder Bore" instructions.
        • II. Oil Cylinder Bore
          • 1. Disconnect spark plug wire and keep it away from spark plug. "G. Avoid Accidental Starts" instructions on page 2. See Figures 37 and 38 on next page.
          • 2. Remove spark plug.
          • 3. Squirt 1oz. (30ml) of clean engine oil into spark plug hole.
          • 4. Cover spark plug hole with rag to prevent fuel from spraying from spark plug hole when starter rope is pulled.
          • 5. Grasp starter cord handle and pull out slowly using a full arm stroke. Repeat once. (This will distribute oil throughout the cylinder to prevent corrosion during storage.) Proceed to Step 8.
          • 6. Push starter button or turn ignition switch key (see equipment manufacturer’s instructions) to cycle the engine for one to two seconds.
          • 7. Turn ignition switch key to “OFF” position. Repeat Step 6. and Step 7. (This will distribute oil throughout the cylinder to prevent corrosion during storage.)
          • 8. Remove rag covering spark plug hole and install spark plug.
          • 9. Carefully disconnect spark plug wire from grounding post, if provided.
        • III. Oil
        • IV. Battery
          • X. Preventing Forest, Brush and Grass Fires
          • XI. Maintenance Intervals
            • Figure 37. Disconnecting/Connecting Spark Plug
            • Figure 38. Typical Spark Plug Connection
            • Table 5. Maintenance Intervals
              • 1. Change Oil
              • 1. Check Oil Level
              • 2. Clean Cooling Fins
              • 1. Change Oil
              • 2. Clean Foam Pre-Filter
              • 1. Replace Paper Element
              • 2. Check Spark Plug
              • 1. Replace Spark Plug
          • XII. Warranty Information
• 181-789-14 (English) 1/01/08
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