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The Mariah Owners Club » Maintenance and Repairs » Mercury MerCruiser

starboard exhaust manifold getting hot!!!

Mercury MerCruiser

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Old 06-07-2010, 07:40 PM   #1

howar2539a is currently offline
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Default starboard exhaust manifold getting hot!!!
Just put a NEW 5.7L long block in my boat and i went through everything cleaned it and all. I started it and the starboard exhaust manifold and heat riser was hotter than the port side. Any ideas???????
Its a 2003 Mariah sx20 with a 5.7L 2bbl carb, performer intake.
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    • Old 06-07-2010, 11:23 PM   #2

    howar2539a is currently offline
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    Default Re: starboard exhaust manifold getting hot!!!
    Its running 60 degrees hotter than port side........
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    Old 06-07-2010, 11:49 PM   #3

    300sflyer is currently offline
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    Default Re: starboard exhaust manifold getting hot!!!
    Sounds like either a blockage in one of the water hoses, or you need a new impeller in your water pump.
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