WilTec LIFAN 2V90F User Manual

© by WilTec Wildanger Technik GmbH Item 92670 Page 14
http://www.wiltec.de 11 2023-1
Air outlet between cylinder
block and cylinder head.
Replace cylinder gas-
ket.
Air outlet in the valves
Grind or replace.
Sudden failure
Problem
Possible cause
Proposed solution
Sudden failure
during operation
Fuel supply sys-
tem
Fuel consumed
Fill in fresh fuel.
Carburettor clogged
Check the fuel supply and
pump and clear any blockages.
Float leaking
Repair.
Needle valve jammed
Repair.
Ignition system
Short circuit due to a breakdown
or carbon deposit on the spark
plug
Replace spark plug.
Side electrode of the spark plug
has fallen off
Replace spark plug.
Spark-plug cable dropped
Repair or replace.
Breakdown of the ignition coil
Replace.
Oil-pressure
system
Too little oil in the tank
Check and top up oil.
Other
Cylinder severely damaged or
valves broken
Repair or replace damaged
parts.
Abnormal noises
Problem
Possible cause
Proposed solution
Knocking noises
Piston or piston ring worn
Replace worn parts.
Connecting rod, piston pin, and piston-pin
bore worn
Replace worn parts.
Worn crankshaft
Repair or replace.
Piston ring broken
Replace piston ring.
Deflagration with
metallic sound
Too much carbon build-up in combustion
chamber
Remove carbon deposits.
Spark-plug-electrode gap too small
Set the electrode clearance correctly.
Engine flooded with fuel
Check carburettor.
Unsuitable fuel type
Replace fuel.
Engine overheating
See table below.
Engine overheating
Problem
Possible cause
Proposed solution
Engine overheat-
ing
Incorrect ignition timing
Replace ignition coil.
Insufficient oil supply
Add oil.
Exhaust clogged
Clear obstruction.

WilTec LIFAN 2V90F Specifications

General

Brand	WilTec
Model	LIFAN 2V90F
Category	Engine
Language	English