Jacto HP726 Owner's/Operator's Manual page 20

HP726 Troubleshooting Guide (Engine)
What To Check
Does the engine
crank?
YES
Good
compression?
YES
Does the tank
contain fresh
fuel of the
proper grade?
YES
Is fuel visible
and moving in
the return line
when priming?
YES
Is there spark at
the spark plug
wire terminal?
YES
Check the
spark plug
ENGINE DOES NOT START
Possible Cause
Faulty recoil starter.
NO
Fluid in the crankcase.
Internal damage.
Loose spark plug.
NO
Excess wear on
cylinder, piston, rings.
Fuel incorrect, stale, or
NO
contaminated; mixture
incorrect.
Check for clogged fuel
NO
filter and/or vent.
The ignition switch
NO
is in "O" (OFF) position.
Faulty ignition ground.
Faulty transistor unit.
If the plug is wet, excess
fuel may be in the
cylinder.
The plug is fouled
or improperly gapped.
The plug is damaged
internally or of the
wrong size.
Remedy
Consult with an authorized
servicing dealer.
Tighten and re-test.
Consult with an authorized
servicing dealer.
Re-fill with fresh fuel of
the correct mixture
(gasoline and Shindaiwa
Premium 2-cycle Engine
Oil gasoline, 50:1 ratio.
Clean as required;
restart.
Move switch to "ON"
position and re-start.
Consult with an authorized
servicing dealer.
Crank the engine with the
plug removed, replace the
plug, and re-start.
Clean and re-gap the plug to
0.24 inch (0.6 mm). Re-start.
Replace the plug with a
NGK BMR6A Re-start.
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