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Old 07-25-2018, 11:55 PM   #1
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Cool Manifold gasket placement

Hello , Have a 1997 Maxum 23SR , alpha one gen 2 drive , 5.7L V8 , replacing exhaust flaps , cleaned and checked the manifolds 4" spacer and risers but dont know the order to replace the gaskets , one open 4 port and one two port with restricted holes, which one go's on manifold and which one go's on top of the spacer, thanks Rich
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Old 07-26-2018, 01:56 AM   #2
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The two port goes between manifold and spacer and the four port between spacer and riser.
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Old 07-26-2018, 02:04 AM   #3
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Just read the service bulletin and the four port gasket should be used in both positions.
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Old 07-26-2018, 03:00 AM   #4
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Thanks mike so don't use the re stricter gasket just use another open four port for both, don't know were the service bulleton is to read.
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Old 07-26-2018, 11:18 AM   #5
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Thanks mike so don't use the re stricter gasket just use another open four port for both, don't know were the service bulleton is to read.
The one I read is in the mercruiser manual. Go to Documents of this site, mercruiser manuals, #24. It's in the exhaust section near the end of the document.
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Old 08-10-2018, 01:46 PM   #6
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Hey Mike , Just a update on the manifold gasket info and just got off the phone with Mercruiser tech department about the right way to install the gaskets, it all has to do with the hoses off the thermostat housing , one hose to 90 at the bottom of manifolds with spacers use four open top and bottom , hose to riser with spacer or not use restricted . thanks for help, very confusing stuff for something so simple.
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Old 08-10-2018, 02:18 PM   #7
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Thanks for the information.
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