Raytard
New Member
- Mar 30, 2015
- 17
- Boat Info
- 97 Sea Ray 270 Sundancer
2006 Crown Trailer
08 Dodge 2500 deleted 6.7
- Engines
- 7.4 merc bravo 1
Hi there, I am doing a raw water to FULL fresh water cooling conversion on a 7.4LX. I have seen in the Mercury bulletins that they recommend putting the block off gasket between the manifold and the spacer. And not between the spacer and elbow? I was hoping to put the block off gasket on top so the spacer would also see antifreeze and be protected better.
Anyways, my main question is, how does the spacer get cooling all around its four ports when a block-off gasket is installed? It seems that the plug on the spacer is only connected to one port. I am pretty sure from having them apart last season that each passage is not connected to each other on the spacer right? If that's the case, then only one port will see coolant (or raw water depending on where I put the gasket).
What am I missing, is there certain spacers specific to fresh water systems only?
Thank you for your replies, so far I've found the Mc324 kit for around $1050 and up. Add manifolds, spacers, bellows kit and a steering pin overhaul kit, and my Canadian wallet is going to take a big hit:smt119
Anyways, my main question is, how does the spacer get cooling all around its four ports when a block-off gasket is installed? It seems that the plug on the spacer is only connected to one port. I am pretty sure from having them apart last season that each passage is not connected to each other on the spacer right? If that's the case, then only one port will see coolant (or raw water depending on where I put the gasket).
What am I missing, is there certain spacers specific to fresh water systems only?
Thank you for your replies, so far I've found the Mc324 kit for around $1050 and up. Add manifolds, spacers, bellows kit and a steering pin overhaul kit, and my Canadian wallet is going to take a big hit:smt119