red side

Engine surges at idle

Engine Surges at Idle

Possible Cause


Possible Remedy

Tank empty or tank vent blocked


Fill tank/bleed system, check tank vent

Air in the fuel system


Bleed fuel system, eliminate air leaks

Pump rear support bracket loose


Replace as necessary

Cold-start device malfunction


Check cold-start mechanism

Overflow fitting interchanged with inlet fitting


Install fittings in their proper positions

Fuel injection pump defective or cannot be adjusted


Remove pump and service


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