1974 888 Merc Outdrive Swap

VForce

Cadet
Joined
Jun 7, 2008
Messages
13
Hi all - Here's the issue. Our '74 Winner with 302/188hp Merc 888 needs an outdrive. The motor on this boat is a closed cooling water system, using the typical belt driven pump to pull raw water thru a hull fitting.

I have found a '73 302/188hp Mec 888 donor boat that is NOT a closed cooling water system.

Are there any differences with the outdrives on closed cooling water and raw water systems?

I recall hearing many years ago that the outdrives on a closed cooling system do not contain a water pump impeller (dont need it). Would I need to remove the waterpump from the donor outdrive before installing it on the boat with closed cooling system? Thanks.
 

WizeOne

Commander
Joined
Mar 23, 2008
Messages
2,097
Re: 1974 888 Merc Outdrive Swap

Hmmm, your '74 888 has a heatexchanger, etc? I didn't realize that the old merc 1's and MR drive setups used the remote pump. It'll be interesting to hear what the experts say.
 
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