Kohler SH270 Generator Set

Tools: Flat feeler gauge, Torque wrench

1. Be sure piston is still at top of compression stroke.
2. Insert a flat feeler gauge between rocker arm and valve stem. Recommended clearance: intake 0.1 mm (0.0040 in.), exhaust 0.15 mm (0.0060 in.).
3. Adjust clearance by loosening locknut and tightening adjuster. Turn clockwise to decrease clearance, counterclockwise to increase.
4. Hold adjuster from turning and tighten locknut. Torque locknut to 10 N·m (88.5 in. lb.).
5. Recheck that clearance is correct.

Tools: Screwdriver

1. Place throttle control into idle or slow position.
2. Turn low idle speed adjusting screw in or out to obtain idle speed of 1800 RPM (± 75 RPM).

Tools: Torque wrench

1. Close fuel shut-off valve.
2. Remove air cleaner outer cover. Reposition fuel tank to access governor shaft and lever joint, or disconnect fuel line and remove tank.
3. Loosen governor lever mounting nut.
4. Move governor lever clockwise until it stops.
5. Rotate governor shaft clockwise until it stops.
6. Hold both in this position and torque governor lever nut to 10 N·m (88.5 in. lb.).

⚠ Carburetor adjustments should be made only after engine has warmed up

1. Place throttle control into idle or slow position.
2. Turn low idle speed adjusting screw in or out to obtain a low idle speed of 1800 RPM (± 75 RPM).

Tools: Feeler gauge, Torque wrench, Wrench

1. Be sure piston is at top of compression stroke.
2. Insert a flat feeler gauge between rocker arm and valve stem. Recommended clearance: intake 0.1 mm (0.0040 in.), exhaust 0.15 mm (0.0060 in.).
3. Adjust clearance by loosening locknut and tightening adjuster. Turn clockwise to decrease clearance; counterclockwise to increase.
4. Hold adjuster from turning and tighten locknut. Torque locknut to 10 N·m (88.5 in. lb.).
5. Recheck that clearance is correct.

⚠ Carbon Monoxide can cause severe nausea, fainting or death. Avoid inhaling exhaust fumes. Never run engine indoors or in enclosed spaces.

⚠ Rotating Parts can cause severe injury. Stay away while engine is in operation.

Tools: Manometer or vacuum/pressure gauge, Rubber stopper, Pinch clamp, Tapered adapters

1. Insert rubber stopper into oil fill hole. Connect hose between stopper and manometer. Leave other tube open. Check water level at 0 line. Close pinch clamp.
2. Start engine and run no-load high speed.
3. Open clamp and note water level. Level in engine side should be minimum 10.2 cm (4 in.) above open side.
4. Close pinch clamp before stopping engine.

⚠ Carbon Monoxide can cause severe nausea, fainting or death. Never run engine indoors

Tools: Water manometer, Rubber stopper, Pinch clamp, Tapered adapters

1. Insert rubber stopper into oil fill hole. Connect hose between stopper and one manometer tube, leave other tube open. Verify water level at 0 line.
2. Start engine and run no-load high speed.
3. Open clamp and note water level in tube. Level in engine side should be a minimum of 10.2 cm (4 in.) above level in open side.
4. Close pinch clamp before stopping engine.

Tools: Cylinder leakdown tester, Air source, Breaker bar, Holding tool

1. Run engine for 3-5 minutes to warm it up.
2. Remove spark plug(s) and air filter from engine.
3. Rotate crankshaft until piston is at top dead center (TDC) of compression stroke. Hold engine in this position.
4. Install adapter into spark plug hole, but do not attach to tester.
5. Turn regulator knob completely counterclockwise. Connect air source of at least 50 psi to tester.
6. Turn regulator knob clockwise until gauge needle is in yellow set area at low end of scale.
7. Connect tester quick-connect to adapter hose. While holding engine at TDC, gradually open tester valve. Note gauge reading and listen for escaping air at intake, exhaust, and crankcase breather.

Tools: DC voltmeter, Jumper cables, Ohmmeter

1. Test battery on unit. Connect DC voltmeter across battery terminals and read voltage (key switch OFF). Turn key switch to start position and read voltage again.
2. Remove electric starter cover panel and check fuse inside plastic holder.
3. Disconnect blue relay lead. Connect jumper from positive battery terminal to relay terminal.
4. Use known good battery and jumper cables to test starter motor.
5. Disconnect leads from starter relay and remove it for testing. Check relay resistance and operation.

⚠ Disconnect and ground spark plug lead(s) before servicing

Tools: Approved fuel container

1. Check for fuel in combustion chamber (disconnect spark plug lead, close choke, crank, remove plug and check tip).
2. Check for fuel flow from tank to carburetor (remove fuel line from inlet fitting, hold below tank bottom).
3. Check operation of fuel shut-off valve (remove sediment bowl, turn valve ON and OFF).

Tools: Torque wrench

1. Check that sealing surfaces of crankcase and closure plate are clean and free of nicks or burrs.
2. Install dowel pins and a new closure plate gasket (dry) onto dowel pins.
3. Install closure plate to crankcase; seat ends of camshaft into mating bearings. Rotate crankshaft slightly to engage governor gear teeth.
4. Install screws securing closure plate. Torque screws in sequence shown to 24 N·m (212 in. lb.).

⚠ Always use new gaskets

Tools: Torque wrench

1. Check for nicks or burrs on sealing surfaces of cylinder head or crankcase.
2. Rotate crankshaft to position piston at TDC on compression stroke.
3. Install dowel pins and a new cylinder head gasket.
4. Install cylinder head and start screws. Tighten initially to 12 N·m (106 in. lb.) in several increments using sequence shown.
5. Tighten to a final torque of 24 N·m (212 in. lb.).