SECTION 5 – FAULT FINDING
5–8
ENGINE
CONCERN POSSIBLE CAUSE CORRECTION
Engine will not start. Insufficient fuel in tank. Fill up fuel tank.
Battery connections dirty or dis-
connected.
Connect, clean and coat with
vaseline the battery connections.
Battery partly run down. Charge battery.
Restricted fuel filters Replace fuel filters.
Restricted prefilter/water separa-
tor.
Replace element.
Air in fuel system. Bleed fuel system.
Polluted fuel. Drain and clean fuel tank.
Refill with clean fuel.
Engine does not give full pow-
er.
Dirty air cleaner. Clean air cleaner.
Restricted fuel filters. Replace fuel filters.
Restricted exhaust pipe. Clean or replace exhaust pipe.
Vent hole in fuel tank filler cap
clogged.
Clean vent hole.
Polluted fuel. Drain and clean fuel tank.
Refill with clean fuel.
Engine overheats. Insufficient coolant. Add coolant.
Dirty radiator. Clean radiator.
Fan drive belts slack or broken. Adjust belt(s) tension, or replace
belt.
Insufficient oil in engine sump. Add oil.
Engine starts, then stops. Air in fuel system. Bleed fuel system.
Fuel filters restricted. Replace filters.
Insufficient oil pressure. Insufficient oil. Add oil.
Sender unit defective. Replace sender unit.
Oil pressure gauge defective. Replace oil pressure gauge.
Engine will not idle. Air in fuel system. Bleed fuel system.
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