Mercruiser Bravo I Closed Cooling?

tank1949

Lieutenant Commander
Joined
Apr 4, 2013
Messages
1,913
I am not 100% familiar with Bravo I water input. Boat seller is telling me that his motors do not have through hull water pick ups to feed raw sea water into his closed cooling system's heat exchanger on 383's. Instead, he is telling me that sea water is picked up from OD and passed to external pump located near harmonic balancer. I thought all Bravo's required water pickup via through hull connection in addition to OD's?

In addition, how would he flush system (risers and heat exchanger) with fresh water? After speaking with him, it sounds like he hasn't??????? Is there a flush kit for these applications?
 

tpenfield

Moderator
Staff member
Joined
Jul 18, 2011
Messages
18,778
the water DOES come in through the OutDrive. the thru-hulls is an add-on feature. the sea water pump runs off of a belt on the engine, as mentioned.

normally, you do not flush a closed cooling system, unless there are problems. A good idea is to have a sea water strainer ahead of the sea water pump to avoid putting marine growth through the heat exchanger.
 
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