255 Owner’s Manual
6-7
Maintenance and Troubleshooting
Engine
For further troubleshooting information other than given here, refer to the propulsion unit operator’s manual.
Symptom
Possible Cause
Engine will not crank
Lanyard – install on ignition safety switch.
Battery switches – turn switches to ON position.
Shift position – check to see that levers are in START or NEUTRAL position.
Battery condition – verify batteries are fully charged.
Starter connections – check connections and tighten. If solenoid clicks when attempting
to start engine, check battery connections. If condition persists, see your authorized
Cobalt dealer.
Engine circuit breaker – verify breaker is in operating position.
Faulty ignition switch – see your authorized Cobalt dealer.
Engine problem – see your authorized Cobalt dealer.
Engine cranks but will
not start
Fuel valves – be sure fuel valves are open.
Contaminated fuel – see your authorized Cobalt dealer.
Engine problem – see your authorized Cobalt dealer.
Low starter speed
Weak or bad battery – see your authorized Cobalt dealer.
Engine runs erratically See your authorized Cobalt dealer.
Engine vibrates
Propeller condition – shut off engines. Check for bent, broken or damaged propeller.
Check for weeds on propeller.
Engine problem – see your authorized Cobalt dealer.
Engine runs but boat
makes little or no
progress
Fouled or damaged propeller – shut off engines. Check for weeds on propeller, bent or
broken propeller. See your authorized Cobalt dealer.
Performance Loss
Throttles not fully open – check to see that both throttles open fully at engines.
Improper fuel – fill tanks with correct fuel.
Overheating – immediately turn off the engines and contact your authorized Cobalt
dealer.
Boat overloaded – reduce load.
Boat trim – distribute boat load evenly.
Improper propeller selection – see your authorized Cobalt dealer.
Excessive bilge water – check for excessive water, drain bilge.
Boat hull condition – clean if marine growth is present.
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