Troubleshooting - Cannondale ATV Owner's Manual

NOTE :
The troubleshooting items listed here are provided as a rough guide to assist in some of the more common difficulties. For
more complete systems troubleshooting, consult the vehicle chassis manual.
PROBLEM
Engine turns over but will not
start or is hard to start

TROUBLESHOOTING

POSSIBLE CAUSE
Fuel deterioration, water in fuel or
no fuel in tank.
Fouled spark plug
Low compression
Battery voltage is low,
discharged. The terminals are loose
or corroded
Fuel pump, injectors, or pressure
regulator is leaking or faulty or fuel
filter is clogged. Fuel tank vent hose
clogged or kinked.
Debris on the crankshaft sensor
tip or an incorrect gap.
(MC500 only) ECU power-down.
SOLUTION
Drain fuel and replace with fresh fuel.
Replace with a new spark plug.
Piston ring is worn or stuck
Cylinder is worn.
Charge and/or clean the battery.
Verify fuel pump operation:
Press the start button without starting the
engine. If the pump does not operate, check
the electrical connections to the pump.
Check the fuel system for leaks. Replace
fuel filter.
Check sensor.
Reset the ECU by turning the ignition
switch to the "OFF" position and then back
"ON" to reset the ECU timer.
157