O.S. Engines 18TM Revo - Manual (Page 28)

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.
Wait until engine is cooled. Engine overheated
Adjust the tension of clutch spring. Incorrect clutch release
Too immediately disconnecting plug battery.
Do not disconnect plug battery and wait until
r.p.m, become stable.
Fuel in the tank extremely bubbled
Fit "0" rings to the tank screws to
prevent bubbles.
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