raw water intake hose diameter - SailNet Community

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  #1  
Old 03-24-2010
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raw water intake hose diameter

Heading to Defender tomorrow and hose is on the list but I didn't measure when I was at the boat last. Is it too general a question or is there a standard ID for raw water intake (stock Westerbeke 13). I think it's 3/4" but want to make sure.
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Old 03-24-2010
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Depends on the engine and the boat. There is no std size.
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Old 03-25-2010
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A lot are 3/4". Older Catalina 30s have 1/2". When I replace my through hull I may go to 1" as more flow is less likely to be restricted. Best to measure it.
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Old 03-29-2010
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I had a 1/2" on my boat when I got it, 30 HP renault, as I am repowering the engine manufacturer says I need 3/4", so it probably would not hurt to get 3/4" as a replacement. I used the groco tri-flange, thru hull, you install with the male threads inside, then a groco ball valve ontop, good stuff...Red
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Old 03-29-2010
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My 15 hp Westerbeke takes 5/8 id hose for the raw water intake.
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5/8" is an odd size. I don't thing I've ever seen a 5/8" through hull.
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Old 03-29-2010
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Hose on my previous 11hp Universal 5411 was 1/2" ID. Hose on my current 27hp Yanmar 3GM is 5/8" ID. Best to measure.
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