Generac Power Systems OHVI GSH 220 Service Manual page 55

ProbleM
7. engine surges or
runs unevenly
8. engine uses excessive
amounts of oil.
9. Crankshaft oil seal leaks.
10. breather is passing oil.
PoSSIble CAuSeS
. Vent hole in fuel tank cap plugged.
2. Governor parts sticking or binding.
. Carburetor throttle linkage,
throttle shaft binding.
. Intermittent ignition spark.
5. Improper carburetor adjustment.
6. Dirty carburetor.
. Engine speed too fast.
2. Oil level too high.
. Oil filler cap loose, or cap gasket damaged.
. Breather damaged or dirty.
5. Drain holes in breather clogged.
6. Gaskets or seals leaking.
7. Valve guides worn excessively.
8. Cylinder walls worn.
9. Piston rings and/or grooves worn.
0. Oil passages obstructed.
. Crankcase breather dirty or defective.
2. Oil seal hardened or worn.
. Crankshaft seal contact surface is worn.
. Crankshaft sleeve bearing worn.
5. Seal not seated squarely in bore.
6. New seal damaged during installation.
7. Bent crankshaft.
. Engine speed too fast.
2. Oil level too high.
. Oil filler cap loose, or cap gasket damaged.
. Breather damaged or dirty.
5. Drain holes in breather clogged.
6. Piston ring end gaps are aligned.
7. Rings not properly seated.
13-3
SeCTIoN 13: TroubleSHooTING
reMedY
. Open vent hole in tank cap.
2. Clean governor parts and replace
as necessary.
. Clean, lubricate, adjust or repair
sticking parts.
. Test ignition as per Section 8,
repair or replace bad parts
as necessary.
5. Adjust carburetor.
6. Clean carburetor.
. Adjust engine speed to
specifications.
2. Drain excess oil from crankcase.
. Replace cap gasket and tighten cap.
. Clean or replace breather
as necessary.
5. Unclog drain holes in breather.
6. Replace gaskets or seals
7. Replace cylinder head.
8. Replace crankcase.
9. Install new rings and/or piston.
0. Clean out oil passages.
. Clean or replace breather.
2. Replace oil seal.
. Check crankshaft size and
replace if worn.
. Replace sleeve bearing.
5. Replace with new seal.
6. Replace with new seal.
7. Check crankshaft for straightness,
replace if necessary.
. Adjust engine speed to
specifications.
2. Drain excess oil from crankcase.
. Replace cap gasket and tighten cap.
. Clean or replace breather
as necessary.
5. Unclog drain holes in breather.
6. Rotate ring end gaps, stagger 90º
apart.
7. Check for worn or "out of round"
cylinder. Install new rings. Break in
new rings with engine under
varying loads.
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