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TROUBLESHOOTING AND ELECTRICAL SYSTEM: 850 GAS
Troubleshooting Guide
Page 12-2
2007-2008 XRT 800, 810 and 850 Maintenance and Service Manual
12
Engine starts but does not run
smoothly.
Spark plug is fouled or in poor condition
Section 15 – Engine
Spark plug wire is damaged or loose
Section 15 – Engine
Intermittent ignition coil failure
Section 12 – Troubleshooting and
Electrical System: 850 Gas
Test Procedures 13, 14, and 15
Water or dirt in the fuel system
and/or carburetor;
dirty or clogged fuel filter
Section 16 – Fuel System: Gasoline
Vehicle
Fuel pump malfunction; fuel pressure to
carburetor too low
Section 16 – Fuel System: Gasoline
Vehicle
Engine turns but fails
to start.
Fuel tank is empty
Section 16 – Fuel System: Gasoline
Vehicle
Fuel line or filters clogged
Section 16 – Fuel System: Gasoline
Vehicle
Fouled spark plug
Section 15 – Engine
Spark plug wire damaged or loose
Section 15 – Engine
Loose wire connection at ignition coil or
RPM limiter
Section 12 – Troubleshooting and
Electrical System: 850 Gas
Test Procedures 13, 14, and 15
Ignition coil or RPM limiter failed
Section 12 – Troubleshooting and
Electrical System: 850 Gas
Test Procedures 13, 14, and 15
Engine flooded with fuel as result of
excess choking
See Section 3 – General Information.
See Choke.
Kill circuit grounded
Section 12 – Troubleshooting and
Electrical System: 850 Gas
Test Procedures 16, 17, and 18
Fuel pump malfunction or failure
Section 16 – Fuel System: Gasoline
Vehicle
Engine overheats.
Fan screen is partially blocked or plugged
Section 15 – Engine
Governor is improperly adjusted
Section 16 – Fuel System: Gasoline
Vehicle
Carburetor is too lean; check main jet size
Section 16 – Fuel System: Gasoline
Vehicle
Engine pre-ignites.
Excessive carbon deposits on piston head
or in combustion chamber
Section 15 – Engine
Spark plug heat range is incorrect
Section 15 – Engine
Unsuitable or contaminated fuel
Section 16 – Fuel System: Gasoline
Vehicle
Troubleshooting Guide continued on next page...
TROUBLESHOOTING GUIDE
SYMPTOM
POSSIBLE CAUSES
CORRECTIVE ACTION
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