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post #1 of Old 06-20-2006 Thread Starter
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Alternator Side Loading Problem

I am in the process of repowering my sailboat and I have estimated the power requirements using Nigel Calder's Boatowner's Mechanical and Electrical Manual. Unfortunately the side load on the engine's cranksaft pulley from the alternator for the house bank will be too great and would cause engine damage.

Nigel Calder, in his book, recommends eliminating side loading by "adding a stub shaft to the crankshaft, and adding a separate pillow block bearing to the stub shaft to absorb the side load of the alternator." I have my boat at Delta Marine in Seattle, however they have no idea how to go about doing this.

Does anyone have experience with this or with eliminating the side load from a large big block alternator?

Are there any plans or diagrams explaining this process?

Is there a kit out there that could help with this project?

Engine: Yanmar 3JH4E
Alternator: Ample Power 4300 Large Case P-Type KKK rated (example)

Thanks in advance for your help.
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