Suzuki LT-A400F Service Manual

Engine General Information and Diagnosis: 1A-1
Engine
Engine General Information and Diagnosis
Diagnostic Information and Procedures
Engine Symptom Diagnosis
B827H11104001
Condition Possible cause Correction / Reference Item
Engine will not start or is
hard to start
(Compression too low)
Worn cylinder. Replace.
Worn piston ring. Replace
Worn valve guide or improper valve
seating.
Repair or replace
Loose spark plug. Tighten.
Slow cranking starter motor. See electrical section.
Mistimed valves. Adjust.
Valve clearance out of adjustment. Adjust.
Engine will not start or is
hard to start (Spark plug
not sparking)
Fouled spark plug. Clean or replace.
Wet spark plug. Clean and dry or replace.
Defective ignition coil. Replace.
Open or short in high-tension cord. Replace.
Defective generator Replace.
Defective CDI unit. Replace.
Engine will not start or is
hard to start (No fuel
reaching the carburetor)
Clogged fuel tank vent hose. Clean or replace.
Clogged or defective fuel valve. Clean or replace.
Defective carburetor needle valve. Replace.
Clogged fuel hose. Clean or replace.
Clogged fuel filter. Clean or replace.
Engine stalls easily Fouled spark plug. Clean or replace.
Defective generator. Replace.
Defective CDI unit. Replace.
Clogged or defective fuel valve. Clean or replace.
Clogged carburetor jet. Clean.
Valve clearance out of adjustment. Adjust.
Engine noisy (Excessive
valve chatter)
Excessive valve clearance. Adjust.
Weak or broken valve spring. Replace.
Worn rocker arm and rocker arm shaft. Replace.
Engine noisy (Noise
seems to come from
piston)
Worn pistons. Replace.
Worn cylinder. Replace.
Carbon build-up in combustion chamber. Clean.
Worn piston pin or piston pin bore. Replace.
Worn piston rings or ring grooves. Replace.
Engine noisy (Noise
seems to come from the
cam chain)
Stretched cam chain. Replace cam chain and sprockets.
Worn cam chain sprockets. Replace cam chain and sprockets.
Improperly working cam chain tension
adjuster.
Repair or replace.
Engine noisy (Noise
seems to come from
crankshaft)
Worn or burnt bearing. Replace.
Big-end bearing worn or burnt. Replace.
Thrust clearance too large. Replace.

Suzuki LT-A400F Specifications

General

Brand	Suzuki
Model	LT-A400F
Category	Offroad Vehicle
Language	English