I have a 1988 Mercruiser 454 with the stock intake and quadrajet cab and wondering if anyone knows for sure if you should install the exhaust gas restrictor plates in one or both sides of the intake manifold gaskets? The Mercruiser manual I have doesn't say anything more than it must use an intake gasket with an opening if it does have an automatic choke.
I also boat in Arizona so we don't have much cold weather but will have plenty of 100+ degree days of boating.
The old rebuilt block did not have them installed but they also put a Gen 5 head on a Mark IV block so I don't trust much of what they did.
It looks like Fel Pro says they should be installed in their instructions.
https://fme-cat.com/livedocs/982M(1-2).pdf
I also boat in Arizona so we don't have much cold weather but will have plenty of 100+ degree days of boating.
The old rebuilt block did not have them installed but they also put a Gen 5 head on a Mark IV block so I don't trust much of what they did.
It looks like Fel Pro says they should be installed in their instructions.
https://fme-cat.com/livedocs/982M(1-2).pdf