1972 100 hp johnson starter wont disingage when i turn swtich off

when im trying to start engine starter engages but its like dragging it wont completely turn engine over when I turn switch off it wont disengage its like its still trying to turn over

herothor said:

when im trying to start engine starter engages but its like dragging it wont completely turn engine over when I turn switch off it wont disengage its like its still trying to turn over

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Hopefully you mean that the bendix gear is just sitting there in the flywheel teeth... NOT actually trying to crank the engine over.

The bendix gear is disengaged by the flywheel suddenly spinning the bendix gear when the engine fires and starts. Simply cranking the engine with the result being that the engoine does not start.... the bendix gear will stay engaged in the flywheel teeth.

If on the other hand, you're saying that the starter solenoid is still engaged and has the electric starter engaged, trying to crank the engine over..... the inner working of the solenoid have arced to an extent that the contacts are welding to the inner plunger due to using a bad battery or a good battery that is low on power, as follows:

(Starter Solenoid Sticking)
(J. Reeves)

Sooner or later a boater will encounter a situation wherethe key is released from the START to the RUN position, or to the OFF position and the boater suddenly realizes that the electric starter is still running. This is due to having the starter solenoid sticking in the closed (contact) position. Sometimes a whack to the solenoid will unstick it temporarily but usually it's necessary to remove the cable from the battery.

The cause? A weak battery or even a top notch battery that is running low in power causes a arcing within the solenoid that eventually welds the two opposing large terminals together.... the two opposing terminals being the large incoming positive battery solenoid terminal connection and the large terminal leading from the solenoid to the starter. The return spring with ther solenoid simply isn't strong enough to break that weld resulting in the continued flow of voltage to the starter.

The cure? If the battery is flawed, get rid of it and purchase a top notch battery. And also...... Replace the solenoid. Don't play with it, trusting that it won't happen again because it absolutely will, and that happening is usually in the worse possible scenario.

Thank you JOE REEVES

Right again Joe, turning like it supost to

We knew you could do it!