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bob70 07-04-2012 03:49 PM

marine alternator
Is there any reason one cannot use a marine 10si or 12si type alternator on an automobile application. I know the reverse is not recommended, but I cannot find anything addressing this question. 07-04-2012 04:57 PM

It will work fine. The reason auto units are not used on boats is because of marine laws. Spark arrestors etc.

bob70 07-04-2012 07:17 PM

Then it's safe to assume they are essentially the same internally; only difference being the spark arresters? 07-04-2012 07:28 PM

Marine 10/12si alt/
Use to rebuild alts, all types. the marine has spark arrestors as mentioned so no diff. But some are 1 wire alts, pos. batt trem only and don't have an ign keyed wire but field themselves with Rpm, so if used a smaller pulley may be needed to initially start alt, that way you won't have to rev it up to start charging.:thumbup:

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