O.S. Engines 21VG-PX - Manual (Page 16)

30
Cause Corrective action
Engine fires intermittently but does not run.
Insufficient fuel in the tank. Fill the tank with fuel.
Deteriorated glowplug Replace glowplug.
Clogged fuel filter
Air cleaner and silencer inside is dirty.
Clean or replace fuel filter.
Replace cleaner element and clean inside silencer.
Engine overheated Wait until engine cools.
Incorrect clutch release Adjust the tension of clutch spring.
Glowplug battery disconnected too soon.
Do not disconnect plug battery and wait until
r.p.m. becomes stable.
Air bubbles in fuel
Install O rings to the tank screws to prevent
bubbles.
31
Cause Corrective action
Cause Corrective action
Unstable idle
Unsuitable glowplug Use suggested glowplug in the instructions.
Unsuitable fuel
Do not use extremely high nitro or
low oil content fuel.
Extremely light flywheel Add heavier flywheel
Silencer is disconnected or has play Install silencer securely.
Not reaching expected peak r.p.m.
Insufficient warming up or running-in.
Set the needle only after warming up.
Complete running-in.
Silencer or manifold is not securely connected
or disconnected. Replace seal ring.
Check the connections and secure them.
Fuel tubing from tank is split or broken. Replace the tubing.