Im close to finishing up my ls5.3 swap into the scarab jet. I still need a marine alternator and starter. I am having trouble finding them. I found ls1 marine starter but it was 450$ no thanks. I have heard the automotive ls1 starter is sealed anyway is that true. I'm sorta stuck does anyone have any advise? Thank you in advance.
The correct answer is you need marine parts. Fire is a bad thing on a boat. An enclosed engine compartment increases the chance of vapors building up in the bilge. That $450 starter is a lot cheaper than replacing a boat or the expense of personal injury because of a bilge explosion. Is it aftermarket fuel injection or GM stuff?
The ls1 starters are sealed and supposed to be OK in an enclosed engine compartment, but they are not USCG approved.
I run the factory ones on mine.
The alternators I'm not sure about. I have the automotive ones on mine for now, but I still don't have hatches on mine so the stick out of the boat anyway.
It's the gm stuff. Ok thanks I've got a hatch with large air intake areas and have a blower fan. Looks like I can find a marine alternator cheap but I'm not sure if it needs to be a delco style or internal rectifier ect...
I don't know where you're located but I have always got starters and alternators from Ron in Parker, AZ. Might try giving him a call, (928) 669-6411 Pro-line performance. I've had 2 of his alternators on my builds. single wire, high output