Possible Cause

Possible Remedy

Improper fuel (gasoline) in tank

Drain tank, flush system, fill with proper fuel

Tank empty or tank vent blocked

Fill tank/bleed system, check tank vent

Air in the fuel system

Bleed fuel system, eliminate air leaks

Fuel filter blocked

Replace fuel filter

Injection lines blocked or restricted

Drill to nominal I.D. or replace

Fuel-supply lines blocked-resticted

Test all fuel supply lines - flush or replace

Paraffin deposit in fuel filter

Replace filter, use Diesel Fuel no. 1

Pump-to-engine timing incorrect

Readjust timing

Injection nozzle defective

Replace or repair

Overflow fitting interchanged with inlet fitting

Install fittings in their proper positions

Fuel injection pump defective or cannot be adjusted

Remove pump and service