Trouble Shooting - O.S. engine MaX-37SZ-HRING Manual

Symptom
Engine fails to fire.
Cause
Fuel tank is empty.
Fuel not reaching the engine.
Glowplug element is burnt out.
Glowplug battery discharged
Clogged fuel filter. Silencer inside is dirty.
Over priming
Fuel tubing is disconnected.
Fuel tubing is kinked, split or has a hole.
Incorrect carburetor settings
Incorrect servo linkage
Reverse rotating direction of electric starter.
Symptom
Engine fires intermittently but does not run.
Cause
Insufficient fuel in the tank.
Deteriorated glowplug
Clogged fuel filter
Silencer inside is dirty.
Engine overheated
Disconnecting plug battery too soon.
Air bubbles in fuel

TROUBLE SHOOTING

Corrective action
Fill the tank with fuel and repeat.
Priming procedure.
Replace glowplug.
Recharge or replace the battery.
Clean or replace fuel filter. Clean inside silencer.
Remove glowplug and pump out excess fuel.
Connect fuel tubing securely.
Check the tubing carefully and replace if necessary.
Return the needle valve
and mixture control valve to basic position.
Reconnect linkage after setting servo at neutral.
Mare sure the engine rotates counter clockwise
seen from crankshaft side.
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Corrective action
Fill the tank with fuel.
Replace glowplug.
Clean or replace fuel filter.
Clean inside silencer.
Wait until engine has cooled.
Do not disconnect plug battery and wait until
the r.p.m. becomes stable.
Fit O rings to the tank screws to
prevent bubbles.
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