370Dancer
Well-Known Member
- Oct 2, 2006
- 2,489
- Boat Info
- 1998 370 Sundancer
- Engines
- 380hp MAG MPI Gen VI with V drives
When I bought my 370 Dancer, it had just had the 3rd set of engines put in. This time, the exhaust system was changed to hydrolift cannisters.
This week, I started to change the manifolds/risers and ran across a couple of things that made me go hmmmmm.
1. Never really looked at it closely, but today realized that I have a FWC half system installed. The manifolds, spacers, and risers are all raw water cooled. I've read that half systems are usually only needed for high performance motors. Would the 380hp engine fall in that category? Or, was the installer just being lazy? I've always plumbed full systems on my other boats.
2. The manifold to spacer (6"), and spacer to elbow gaskets are both full gaskets. All 4 sides of the water jacket are open. I have read that if you use spacers, that the gasket between the spacer and the elbow should be a restrictor gasket, where 2 of the water jacket openings are small holes. Or, are those just used on full raw water systems?
Both engines run around 165-170 degrees Stbd is slightly cooler as it has the cockpit heater plumbing on it.
Opinions?
This week, I started to change the manifolds/risers and ran across a couple of things that made me go hmmmmm.
1. Never really looked at it closely, but today realized that I have a FWC half system installed. The manifolds, spacers, and risers are all raw water cooled. I've read that half systems are usually only needed for high performance motors. Would the 380hp engine fall in that category? Or, was the installer just being lazy? I've always plumbed full systems on my other boats.
2. The manifold to spacer (6"), and spacer to elbow gaskets are both full gaskets. All 4 sides of the water jacket are open. I have read that if you use spacers, that the gasket between the spacer and the elbow should be a restrictor gasket, where 2 of the water jacket openings are small holes. Or, are those just used on full raw water systems?
Both engines run around 165-170 degrees Stbd is slightly cooler as it has the cockpit heater plumbing on it.
Opinions?