WilTec LIFAN 2V90F User Manual

© by WilTec Wildanger Technik GmbH Item 92670 Page 12
http://www.wiltec.de 11 2023-1
• If the petrol engine has just been running, wait until it has cooled down before servicing the
spark plug.
• To ensure normal operation of the petrol engine, the spark-plug gap must be set correctly and
there must be no deposits.
1. Remove the spark-plug cap and remove the dirt from around the spark plug.
2. Remove the spark plug using a special 21-mm socket spanner.
3. Check the spark plug and replace it if it is damaged or heavily clogged, the seal is aged, or
the electrodes are excessively worn.
4. Measure the electrode gap with a feeler gauge. If necessary, bend the side electrode to
adjust the distance.
5. The spark-plug gap is 0.7–0.8 mm.
6. Install the spark plug carefully to avoid thread misalignment.
7. After installing the spark plug, tighten the spark plug with the seal using a 21-mm spark-plug
socket spanner.
Important!
• When installing a new spark plug, tighten the seal by half a turn more.
• When installing a used spark plug, tighten the seal by an eighth to a quarter of a turn more.
№
Name
1
Spark-plug connector
2
Spark plug
3
Side electrode
Troubleshooting
Low motor power
Problem
Possible cause
Proposed solution
Engine power is insuffi-
cient, engine speed
drops, or engine even
stops
Ignition system
Incorrect ignition timing
Replace ignition coil.
Fuel supply system
Air mixture in the oil circuit
Release air.
Incorrect setting of main
nozzle
Set new.
Needle valve or main noz-
zle clogged
Clean and blow out.
Fuel tap blocked
Clean or replace.
Too many carbon depos-
its in combustion chamber
Clean out.

WilTec LIFAN 2V90F Specifications

General

Brand	WilTec
Model	LIFAN 2V90F
Category	Engine
Language	English