Trouble Shooting When The Engine Fails To Start - O.S. engine FL-70 Owner's Instruction Manual

TROUBLE SHOOTING WHEN THE ENGINE FAILS TO START

Four key points
For quick, reliable starting, the following four conditions are required.
(1.) Good compression.
(4) Sufficient electric starter rotating speed.
If the engine fails to start, or does not keep running after being started, check symptoms against the
following chart and take necessary corrective action.
Note: The most common causes of trouble are marked with three asterisks, the less common problems
with one or two asterisks.
Factor
Symptom
Engine falls
to fire.
(2.) Adequate "glow" at glowplug.
Cause
Sluggish rotation . . . . . . Recharge the electric starter battery.
Glowplug battery . . . . . . Recharge lead-acid cell or replace dry battery. (Note: An unused, or almost
discharged,
Glowplug element Is • • • • • Replace glowplug. Check that applied voltage Is not too high.
burned out
Something wrong with . . • • Check glowplug heating using other leads
battery leads.
Engine "flooded" due to • • • • Close needle-valve fully and remove glowplug, then Hip propeller to pump
excessive priming,
Insufficient priming. . . . . . Repeat priming procedure referring to Priming.
(3.) Correct mixture.
Corrective action
unused, dry battery may sometimes be of insufficient capacity if it is "old
stock".)
out excess fuel. (Invert engine, if possible, white pumping out excess). Re-
start engine. (Priming is not necessary at this lime.)
32