O.S. Engines 21VZ-B V-Spec - Manual (Page 27)

TROUBLE SHOOTING
Fuel tank is empty.
Fuel not reaching the engine.
Fill the tank with fuel and repeat
Priming procedure.
Replace glowplug.
Recharge or replace the battery.
Glowplug element is burnt out.
Glowplug battery discharged
Clogged fuel filter
Air cleaner and silencer inside is dirty.
Clean or replace fuel filter.
Replace cleaner element and clean inside silencer.
Remove glowplug and pump excess fuel. Over priming
Fuel tubing is disconnected.
Fuel tubing is kinked, split or has a hole. Connect fuel tubing securely.
Check the tubing carefully and replace if necessary.
Return the metering needle
and mixture control valve to basic position.
Re-linkage after setting servo at neutral.
Mare sure it rotates counter clockwise seen
from crankshaft side.
Reverse rotating direction of starter box.
Incorrect servo linkage
Incorrect carburetor settings
Engine fails to fire.
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