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Old 06-20-2006
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You'll probably need to go to a shop that specializes in engine work to get this done. I don't believe any stock marine service yard will have the skill or technical chops to do this sort of work.

The stub shaft, essentially extends the crank shaft past the interior of the engine block, IIRC, and then it goes into the pillow block bearing, and adds a lot of lateral support , allowing the crankshaft to handle the side load of the alternator.

In layman's terms, the way the crankshaft is right now, it is supported only on one side, and the load from the alternator is heavy enough to torque it out of alignment slightly, causing serious engine problems. The stub shaft allows the load from the alternator to be supported on both ends... preventing the torque from causing serious engine problems.
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

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