inspection cover o-ring
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inspection cover o-ring

  1. #1
    Impeachment! 75 TX's Avatar
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    Default inspection cover o-ring

    I recently took my inspection cover off (for the 1st time) to do my pressure tap and noticed that the cover is missing it's o-ring. Perhaps the shop that did my setback forgot it....I dunno. It's the tighter fitting "race" inspection cover, and unfortunately the factory Berk o-ring doesn't fit (too small). No big deal really, I've already measured and ordered some o-rings from McMaster-Carr.
    My question is this...is it likely that the unsealed cover was leaking and bleeding off performance? Inspection cover is outside the boat, so I didn't notice any accumulation of water inside

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    ohhh, you may notice a gain in performance once ya put a o ring in it! I have thought about buying one of those "race" hand hole covers. is it a big chunk of billet or is there a cavity on the top? like the berks have? I have never seen one in person.

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    Quote Originally Posted by Adam View Post
    ohhh, you may notice a gain in performance once ya put a o ring in it! I have thought about buying one of those "race" hand hole covers. is it a big chunk of billet or is there a cavity on the top? like the berks have? I have never seen one in person.
    The two look very similar in their shape. Top is dished just like factory. The main difference is the tight fit of the 'race' cover. The round area that fits into the suction piece is a bit wider than the stock unit, resulting in tighter tolerances between suction piece and inspection cover. The factory unit is also tapered at the bottom of the round area whereas the race unit is straight.
    The race unit looks to be a catsing that is machined to it's final shape/dimensions.


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    Senior Member jetboatperformance's Avatar
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    Quote Originally Posted by 75 TX View Post
    My question is this...is it likely that the unsealed cover was leaking and bleeding off performance? Inspection cover is outside the boat, so I didn't notice any accumulation of water inside
    This would likely scrub off some performance , leaking missing cleanout Oring will/can cause cavitation Tom

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    Quote Originally Posted by 75 TX View Post
    The two look very similar in their shape. Top is dished just like factory. The main difference is the tight fit of the 'race' cover. The round area that fits into the suction piece is a bit wider than the stock unit, resulting in tighter tolerances between suction piece and inspection cover. The factory unit is also tapered at the bottom of the round area whereas the race unit is straight.
    The race unit looks to be a catsing that is machined to it's final shape/dimensions.
    cool, the top side is what I haven't seen, I have seen a pic of the impeller side and it looked to only have about .050 clearance. did ya have to cut the notch in the suction housing out? sorry I will stop hijacking the thread.

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    Quote Originally Posted by Adam View Post
    cool, the top side is what I haven't seen, I have seen a pic of the impeller side and it looked to only have about .050 clearance. did ya have to cut the notch in the suction housing out? sorry I will stop hijacking the thread.
    No worries on the highjacking
    Bump in the suction piece was removed. Front edge of the inspection cover needed flattened to fit my application.

    Last edited by 75 TX; 08-29-2010 at 06:31 PM.

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