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  1. #1
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    Aug 2008
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    Fort Walton Beach, FL
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    538

    2003 200hp OX66...what's the max pressure?

    I've done the poppit valve upgrade and have very responsive pressure readings. Only problem is that at WOT, my pressure is getting up around 28 or 29 (the gauge is maxxed at 30). Before swapping PCVs to the new style, I was only getting around 20-22 at WOT...but the new spring could cause greater pressure if it is stiffer than the old. Anyone know what the upper end is recommended? I put the vavle in with the rounded end facing the block and the guides on the spring. I've read here and elsewhere that it can go that way, even though parts diagrams show it the other way with the guides in the grommet. Anyone know if it makes too much of a difference? Thanks.
    2013 Ranger Z520C
    Merc 250 ProXS

  2. Moderator 21XDC's Avatar
    Join Date
    Sep 2004
    Location
    Westland Michigan
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    65,307
    #2

    Re: 2003 200hp OX66...what's the max pressure? (big_b16)

    You put it in the correct way. No problem with higher water pressure. You might be able to go up with the motor height and gain some speed and handling.

    Marks Props 317-398-9294, 1850 East 225 South, Shelbyville, Indiana 46176 propellerman59@gmail.com http://www.marksprops.com/index.html

  3. Member
    Join Date
    Aug 2008
    Location
    Fort Walton Beach, FL
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    538
    #3

    Re: 2003 200hp OX66...what's the max pressure? (21XDC)

    Thanks.
    2013 Ranger Z520C
    Merc 250 ProXS

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