40 HP Mercury Starter Issues

[Justwantorelax]

1975 Mercury 40 HP outboard, 2 clylinder.
Starter was dragging so I pulled it, disassmbled clenad it , reassembled and put back in motor. Now it spins clock wise and bendix will not engage. How could it be possible to reverse polarity? Only a Neg and Power cables to hook to starter. Um I am confused.
If I pull it out and reverse cables to battery she spins counter clockwise and bendix engaes, What is going on?

 

[schematic]

Re: 40 HP Mercury Starter Issues

sounds like the commutator end frame(brush holder frame) is put on 180 deg out to the barrel, or barrel is swapped end for end.

 

[Justwantorelax]

Re: 40 HP Mercury Starter Issues

sounds like the commutator end frame(brush holder frame) is put on 180 deg out to the barrel, or barrel is swapped end for end.

Barrel can not be wapped end for End I don't think (can it)? I didn't think it could. Why would the brush frame and brushes matter if they are rotated 180 on the barrel. I am confusederer.

 

[schematic]

Re: 40 HP Mercury Starter Issues

Barrel can not be wapped end for End I don't think (can it)? I didn't think it could. Why would the brush frame and brushes matter if they are rotated 180 on the barrel. I am confusederer.

Brush relationship to field coils or magnets with result in change of rotation.

90deg or 180deg change will reverse rotation depending on starter motor design.

 

[Justwantorelax]

Re: 40 HP Mercury Starter Issues

Brush relationship to field coils or magnets with result in change of rotation.

90deg or 180deg change will reverse rotation depending on starter motor design.

That was it, I intalled barrel reversed. Turning correct now, but sluggish. I most likely need to have someone rebuild starter or buy a new one.
Thanks so much for help!

 

[schematic]

Re: 40 HP Mercury Starter Issues

your welcome!

 

[quicktach]

Re: 40 HP Mercury Starter Issues

Sluggish ? Is your battery voltage OK ?

 

[pawpasno]

2011 60hp Mercury Big Foot - When idling in neutral the starter will start spinning all of a sudden. It does not engage to the flywheel. A few days later it was sitting on the trailer in the yard & I had the key in the on position for at least 10 minutes while putting line on fishing rods and the engine started while I was at the front on the boat. Any ideas what I should be looking for???

 

[GA_Boater]

2011 60hp Mercury Big Foot - When idling in neutral the starter will start spinning all of a sudden. It does not engage to the flywheel. A few days later it was sitting on the trailer in the yard & I had the key in the on position for at least 10 minutes while putting line on fishing rods and the engine started while I was at the front on the boat. Any ideas what I should be looking for???

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