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  1. #1

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    Oil Block off, case plug? Why?

    I was about to buy an oil block off plate, i see em everywhere for 10 to 20 bucks, then i noticed this:

    http://www.jetskihaven.com/jetskipro...p?prodnum=2248

    Do you need the case plug? Why do no others come with?


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    My guess is that the case plug takes up the empty space where the oil pump drive would normally be. It would keep the crankcase volume consistent from oil pump to no oil pump.

    On a stock engine, I doubt it would make much difference.

    Has your oil pump failed?

  3. #3
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    Quote Originally Posted by K447 View Post
    My guess is that the case plug takes up the empty space where the oil pump drive would normally be. It would keep the crankcase volume consistent from oil pump to no oil pump.

    On a stock engine, I doubt it would make much difference.

    Has your oil pump failed?
    Correct ^^^^^

  4. #4

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    Quote Originally Posted by K447 View Post
    My guess is that the case plug takes up the empty space where the oil pump drive would normally be. It would keep the crankcase volume consistent from oil pump to no oil pump.

    On a stock engine, I doubt it would make much difference.

    Has your oil pump failed?
    No I just dont want to give it the chance to if im going to spend all this money replacing pistons and rebuilding carbs. Also the flame arrestors I want to get from starflight dont have oil fittings (i think)

  5. #5
    Lake Mead Bum & BTLS Mark starflight's Avatar
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    Quote Originally Posted by Seanace1 View Post
    Also the flame arrestors I want to get from starflight dont have oil fittings (i think)
    They don't have the oil ports, but I have a set of carbs from a 780 that do if you wanted to keep the oil injection.

    Did you read the thread that said 780 carbs were the only way to keep 650-750s from burning holes in the pistons? The 780s sbn 38s high speed passages don't close up like the 650/750 sbn 38s will.

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