Maintenance
2.40
General Troubleshooting -- Continued
Engine Overheating / Misc.
Symptoms: Engine overheats.
S Cooling water passages in pump restricted (check screen and passages)
S Impeller or pump housing damage
S Pump housing passage plugs missing
S Thermostat/pop--off valve restricted
S Cooling water passages in engine restricted with sand or debris
S Loose or damaged cooling hoses or clamps
S Collapsed exhaust hose or pipe (restricted)
Symptoms: Hard starting (engine turns over with electric starter but engine won’t start)
S Outoffuel
S Low compression
S Weak spark or no spark (see ignition troubleshooting)
S Lean mixture (see lean mixture troubleshooting)
S Choke inoperative or not closing completely
S Fouled spark plug(s)
S W ater in fuel
S Worn, broken or cracked reeds
S Restricted or plugged low speed/idle passages
Symptoms: Low compression.
S Choke or throttle closed (both must be wide open for test)
S Loose cylinder head or head gasket failure
S Rings stuck or broken, or excessive end gap
S Piston damage (see piston damage)
S Cylinder worn, improperly honed or bored, damaged
Symptoms: Erratic idle/no idle.
S Idle speed improperly adjusted
S Plugged or restricted low speed fuel passages
S Incorrectly adjusted low speed mixture screw
S Ignition problem
S Throttle linkage worn or sticking
S Air leaks in intake tract
Symptoms: Hissing sound when removing gas cap.
S Hose kinked
S Outlet check valve clogged
S Vent line plugged
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