Linhai ATV 500-D T3 EFI Service Manual page 43

CHAPTER 3 ENGINE
Unstable Engine Running or Engine Stops
Loosen drain screw, and check
the if fuel has reached carburetor
With Fuel
Remove spark plug
and check it
Normal Spark Plug
Remove spark plug and mount it
to spark plug cap, get it earthed
and check spark
Normal Spark
Measure compression pressure
with pressure meter
Normal compression pressure
Check ignition timing
Correct
Check caburetor
mixture screw
Correct adjustment
Check if there is
secondary air into
carburetor joint
No secondary air
Remove fuel enrichment
device wire lead and
check continuity
Normal Continuity
No fuel
Stained, damaged and color changed
Weak spark or
No spark
Low or no
compression
pressure
Incorrect
Improper adjustment
Air intake
No continuity
LH500ATV-D T3 EFI SERVICE MANUA 19.0
No petrol in fuel tank
Clogged fuel hose
Clogged float valve
Clogged fuel filter
Clogged fuel tank cap breather hole
Stained or damaged spark plug
Improper spark plug heat value
Faulty spark plug or stained spark plug
Faulty Ignition coil
Faulty high tension coil or short circuit
Faulty ignition switch
Faulty pickup coil
Faulty CDI unit
Worn Cylinder and piston ring
Faulty cylinder gasket
Faulty pickup coil
Faulty CDI unit
Refer to Engine Service
Faulty tightening of carburetor joint
Broken cable of fuel enrichment device
Faulty fuel enrichment device
CHAPTER 3 ENGINE
.
PAGE. 3- 10