Generac Power Systems R100 Operator's Manual page 17

4. ENGINE SUDDENLY STOPS RUNNING:
TROUBLE
Fuel tank is empty
Carburetor is clogged
Float is leaking
Needle valve is sticking
Spark plug is damaged, or short- circuited by carbon
deposit
Side electrode of spark plug is dropped out
High-tension wire is dropped out
Ignition coil is punctured or short-circuited
Engine kill wire is touching (grounding)
Cylinder is seriously scored and valve dropped out
5. ENGINE IS OVERHEATING
TROUBLE
Insufficient oil
Exhaust pipe blocked up
Shroud leaking
Cooling fins blocked by foreign matter
Cooling fan loose and not working
Connection rod deformation causing piston and cylinder
bushing side wear
Cylinder or piston or piston ring is worn and is creating
heat between cylinder and crankcase
Improper adjustment of engine governor causing high
speed.
Crankshaft main bearing burnt out
CAUSE
CAUSE
REMEDY
Refill fuel tank
Check fuel line and dredge
Repair
Dismantle float chamber and free up needle valve
Replace spark plug
Replace spark plug
Weld on
Replace ignition coil
Locate ground and insulate
Repair or replace damaged parts
REMEDY
Refill engine oil to proper level
Clean exhaust pipe
Repair damaged part
Clear cooling fins
Repair cooling fan
Replace connection rod
Replace the worn parts
Readjust engine governor
Replace main bearing
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