I am an hour from my boat, and have a crazy few weeks ahead, I am hoping someone might know part numbers or some other way to identify and locate some random parts. Thanks In advance. Ok, The boat is a 1983 Excalibur Marine 40' hawk, original twin mercruiser 370 454 7.4L v-8. I just had the long blocks done and reassembled both, I need part numbers or help locating OIL PUMP GASKETS, ALTERNATORS, WATERPUMPS, and possibly MANIFOLDS. thanks
Kevin

The boaters bible, BAM Mercruiser.

http://www.mercruiserparts.com/selec....asp?type_id=8

Thanks for the site, extremely helpful, I am guessing the link for the 330 GM 454 v-8 1982-1987 would be the best pick? mine is a mercruiser 370 454 1983.

look under 370 trs would be yours 1978-1985 according to my mercruiser epc

heres the link for the 370: http://www.mercruiserparts.com/selec...doc_nbr=+86187

The internals/heads on the 330 will be different from your 370. But from your list, the only thing that might be different is the intake manifold gasket.
Thry this:
http://www.dolleroffshore.com/parts....pn=274&bn=1059

Thank you guys. I can finally get the parts I need with out all the guess work and trial and error I had gone through in the past. ( Bringing an oil pump around with me from shop to shop to match the gaskets was getting old) If I can ever return the favor to any of you please do not hesitate.
thanks,
Kevin

Ok, one more issue, I found the Mercruiser part number 817119A4 for the 55amp alternator, I am not sure if the 55amp or 39amp alt. is used on my boat. I currently want to replace the Motorola 8RG2018 alternator that is in it. Will the mercruiser part 817119A4 work?

Go figure that the 55amp is cheaper then the 39 amp model!!!! anyway why dont you just have yours rebuilt? Last time i had one done it was a tad over $100 with a 1 year warranty....other then if the brushes go bad for some strange reason it will last you alot longer then 1 year It will save you some money work just as good as new and you can still get more stuff

That is a good idea, and I would at this point do that, except, in my research I found out the non motorola alternator that is currently on my port engine, is automotive, thus not explosion proof, and now I must replace that one.