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  1. #1
    Join Date
    Sep 2008

    496ho's saltwater

    Guys, looking for some information regarding the difference between HO's and 525's in saltwater. I was told the HO's are easier to mantain and won't be damaged by the salt as much as the 525's. Is this true?

  2. #2
    Registered techman's Avatar
    My Boats:
    Fountain 35 Lightning
    Join Date
    Jan 2005
    Both are closed cooled so the blocks are not exposed to raw water (salt) and have coolant circulating. The exhaust manifolds, oil cooler, power steering cooler, and heat exhanger are cooled by sea water so you still need to routinely flush when running in the salt.

    The 496's stock exhaust are cast iron or aluminum (depending on the year) and resist corrosion better than the 525's stainless sweeper headers. The 525 headers require more frequent inspection as a result to check for leaks.

    The 496's do have a quick drain system and the 525's do not. That helps drain the raw water side of the system for extending boating in cooler climates.
    Last edited by techman; 07-30-2011 at 08:14 PM.

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