O.S. Engines 21RG-MX - Manual (Page 22)

Symptom Factor Cause Corrective action
Voltage too high or too low. Re-check and readjust referring to
"BEFORE STARTING"
Continue to apply starter. If necessary disconnect battery from
glowplug and leave for a few minutes, then re-energize plug. If
engine still does not start, remove glowplug and pump out excess
fuel.
Then re-start.
Recharge the electric starter battery.
Recharge lead-acid cell or replace dry battery.
(Note: An unused, or almost unused, dry battery may sometimes
be of insufficient capacity if it is "old stock".)
Refer to p.9
Close needle-valve half turn (180
°
) and wait for several minutes,
then re-start.
Make sure that tank is filled with fuel. Check that there is not
something wrong with fuel tubing (kinked or split). Check that
carburettor is not clogged with dirt.
Close the needle-valve a little.
Change fuel or glowplug.
Engine fires
intermittently but
does not run.
Engine fires once or
twice, then fails to fire.
Engine starts but revol-
utions decrease and en-
gine eventually stops.
Engine starts, then
revolutions increase
and engine cuts out.
Engine stops when battery
leads are disconnected
after starting.
Incorrect heating of
glowplug.
Excess fuel
Sluggish rotation.
Glowplug battery
discharged.
Insufficient fuel
Mixture too rich.
Fuel not reaching
the engine.
Mixture too rich.
Mismatch of glow plug
and fuel.
3
4
2
★
★★
2
3
3
3
3
2
★★
★★
★★
★★★
★
★★
★
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21