Specifications

Cause Remedy

Governor not properly adjusted. Adjust governor.

Carburetor not properly adjusted. Adjust carburetor.

Intermittent spark at spark plug. Disconnect ignition cut-off wire at the engine. Crank

engine. If spark, check ignition switch, safety switch

and interlock switch. If no spark, check magneto.

Check wires for poor connections cuts or breaks.

G. ENGINE VIBRATES EXCESSIVELY

Engine not securely mounted. Tighten loose mounting bolts.

Bent crankshaft. Replace crankshaft.

Associated equipment out of balance. Check associated equipment.

Counterbalance counterweights not properly aligned. Check.

H. ENGINE USED EXCESSIVE AMOUNT OF OIL.

Engine speed too fast. Using tachometer adjust engine RPM to specification.

Oil level too high. Check level turn dipstick cap tightly into receptacle for

accurate level reading.

Oil filler cap loose or gasket damaged causing Replace ring gasket under cap and tighten cap securely.

spillage out of breather.

Breather mechanism damaged or dirty causing Replace breather assembly.

leakage.

Gaskets or “O” rings damaged or gasket or “O” ring Install new gaskets or “O” rings.

surfaces nicked causing oil to leak out.

Valve guides worn. Ream valve guide oversize and install 1/32'’ (.787 mm)

oversize valve.

Cylinder wall worn or glazed allowing oil to pass Deglaze cylinder as necessary.

rings into combustion chamber.

Piston rings and grooves worn excessively. Reinstall new rings and check land clearance and correct

as necessary.

Piston fit too loose. Measure and replace as necessary.

Piston oil control ring return holes clogged. Remove oil control ring and clean return holes.

Oil passages obstructed. Clean out all oil passages.

I. OIL SEAL LEAKS

Seal hardened or worn. Replace seal.

Crankshaft seal contact surface is slightly Crankshaft seal rubbing surface must be smoothed

scratched causing seal to wear excessively. before installing new seal. Use a fine crocus cloth.

Care must be taken when removing seals.

Crankshaft bearing under seal is worn excessively Check crankshaft bearings for wear and replace if

causing crankshaft to move. necessary.

Seal outside seat (oil seal bore) in cylinder or Visually check seal receptacle (oil seal bore) for

side cover is damaged allowing oil to seep damage. Replace P.T.O. cylinder cover or small cylinder

around outer edge of seal. cover on the magneto end, if necessary.

New seal installed without correct seal driver Replace with new seal using proper tools and methods.

and not seating squarely in cavity.