WilTec LIFAN 2V90F User Manual

© by WilTec Wildanger Technik GmbH Item 92670 Page 13
http://www.wiltec.de 11 2023-1
Suction system
Air filter clogged
Clean or replace element.
Air leakage in the suction
system
Repair or replace.
Poor compression
Piston, cylinder, or piston
ring worn
Replace.
Air outlet between cylin-
der block and cylinder
head.
Replace cylinder gasket
Incorrect valve clearance
Readjust.
Poor valve tightness
Grind or replace.
Problems starting the engine
Problem
Possible cause
Proposed solution
Normal cyl-
inder pres-
sure
Normal
sparking
of the
spark
plug
Fault in
the fuel-
supply
system
Fuel sup-
ply is not
smooth
Not enough fuel in the fuel tank
or fuel tap closed
Fill with fuel, open the
fuel tap.
Ventilation of fuel-filler cap
blocked
Clean the vent open-
ing.
Fuel tap blocked
Clean.
Main nozzle not set correctly or
clogged
Readjust, clean, blow
out.
Needle valve or float jammed
Repair/replace.
The fuel
supply is
smooth
Fuel too dirty or spoilt
Replace fuel, clean
carburettor.
Water in fuel
Replace fuel, clean
carburettor.
Too much fuel in the cylinder
Drain excess fuel, dry
spark plug.
Wrong fuel brand
Select the correct fuel
brand according to the
requirements.
Normal
fuel sup-
ply sys-
tem
Normal
sparking
Spark
plug is
damaged
Too many carbon deposits and
dirt around the electrodes
Clean.
Insulators damaged
Replace spark plug
Electrodes badly burnt
Replace spark plug.
Wrong spark plug gap
Adjust.
Spark
plug
works
smoothly
No spark-
ing
High-pressure coil damaged
Replace.
Ignition coil damaged
Replace.
Magnet loses magnetic force
Magnetise/replace.
Abnormal
cylinder
pressure
Normal
fuel sup-
ply sys-
tem
Normal ig-
nition sys-
tem
Spark
plug
works
smoothly
Piston ring excessively worn or
broken
Replace.
Piston ring jammed
Remove carbon de-
posits.
Spark plug not tightened or in-
stalled without gasket
Tighten with a gasket.

WilTec LIFAN 2V90F Specifications

General

Brand	WilTec
Model	LIFAN 2V90F
Category	Engine
Language	English