Provide additional fuel during starting

Provide positive starting

Intake manifold

Determine timing and sequence of fuel injection

Engine hard to start - Hot

Engine cranks but will not start

Pressure regulator

Engine produce abnormal noise

Thermo time switch faulty

Defective oil pressure

Faulty fuel filter

Damaged radiator

Plug runs too cold

Incorrect tappet clearance

Plug runs too hot

Incorrect fuel mixture