View Full Version : 84 s&s alternator replacement

06-16-2011, 05:39 PM
So my boat will run for 3-4 hours then dies suddenly and won't crank anyway I have found the alternator is bad my question is the marine ones are super expensive the cheapest one is from ski dim has anyone tried using a automotive one? Or is the marine one way different

06-16-2011, 05:46 PM
Check with a local rebuilder, they can usually convert alternator to marine status.
It's mainly adding arc proof screens to the vented housing.

06-17-2011, 12:57 AM
Definitely Do Not use an automotive alternator in your boat. You run the risk of a spark from the alternator igniting gas fumes causing an explosion.

Take your alternator to a local rebuilder and he will take care of it cheaper than a new unit. You can opt for al higher capacity upgrade at the time as well.

06-17-2011, 07:49 AM
I recently went through this... I opted to go with a new higher amp one wire model... It was about 20.00 more than having a 27 year old alt re-built.

06-17-2011, 08:02 AM
I own and 1984 as well. Use a marine alternator. It's a safety risk not worth taking. I would never endanger myself or others by installing a car alternator on a boat.

06-29-2011, 09:23 AM
second that... Marine for sure!