Re: emptied fuel tank (results)
im leaning towards this (shift interrupt switch )
TROUBLESHOOTING IDLE STABILIZER SHIFT SYSTEM
When outboard is idling IN NEUTRAL, shift switch circuit is in the OPEN position and system is INACTIVE.
When outboard is shifted INTO GEAR, shift switch circuit CLOSES. BIAS VOLTAGE from each switch box is changed by a 6.8K (±.34K) resistor located in the WHITE/BLACK lead between the switch boxes and the shift switch. The shift switch is now CLOSED and completes the circuit to ground. THREE DEGREES of timing advance occurs when the shift system works properly.
If the resistor is OPEN or the shift switch circuit stays OPEN, the THREE DEGREES of advance will not occur when the outboard is shifted into gear AND maximum timing at W.O.T. will be RETARDED THREE DEGREES.
If the resistor should SHORT TO GROUND, engine timing will be overly advanced and damaging powerhead detonation will occur.
Connect a timing light to No. 1 spark plug lead (top, starboard bank). Start the engine, and allow it to idle above 600 RPM, then retard the ignition timing by slowly pulling forward on the spark advance lever. Observe that the system is functioning by noting a rapid spark advance (as much as 9° from the idle setting) as the engine slows down to below approximately 550 RPM.
The idle stabilizer is not repairable. Should the idle stabilizer fail to function as described, it will require replacement.
90-898303 2-27
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