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  1. #1

    oil block off plate

    Pros and Cons please. Im being told by people I should do it while others are telling me I will lose performance


  2. #2
    96XPSS's Avatar
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    Lose perforrmance by installing a block-off plate on your engine? How?

    Ask them to please elaborate...ha ha!

  3. #3
    Stop Obama Express
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    I was going to order a block off plate till i was told to remove the plastic drive shaft from the pump and then reinstall the pump as a block off. Saves a few bucks and works.

  4. #4
    so no cons?

  5. #5
    JayZ's Avatar
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    you will go through more oil and it is a bit less convenient to add oil to the gas when filling up. not big issues. i will be converting my xpl back to oil injection in the near future.

  6. #6
    96XPSS's Avatar
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    The only cons are what Jay mentioned.

    Whoever said you lose performance though, is an idiot. You are getting the same 40:1 mix at wot with an oil pump as you are premixed. It will smoke noticeably more at idle, due to no decrease in oil mixture (no pump to throttle the ratio back).

    As a cruiser ski...I would keep the stock pump. As a modded ski, I'd premix. My definition of modded is piping a ski. Adding flame arrestors and a milled head is fine for stock oil pumps.

  7. #7
    Is there a good way to test the oil pump while its in still? just wondering

  8. #8
    The oil pump should be very easy to remove. The only thing I noticed with mine internally when removed, was the plastic drive shaft had twisted off at the end. I would think the easiest way to test the pump is to remove it from the stator housing and use the plastic driveshaft to turn the pump. It should push oil out if it's working right. Don't expect a ton at a few slow turns though. But all things aside, I too just used the pump as the block off and it works fine. There's nothing behind it that needs the oil, it's just to seal the stator housing from getting wet. One really good thing about going premix, when the injector cable is unhooked your throttle lever tension will be a ton lighter. It's really nice on the thumb during the long hauls. Another plus is you're garaunteed to have oil in the system so no worries about the pump blowing up (which happened to me lol) or just stopping to work when way out on the open waters.

  9. #9
    diver2694's Avatar
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    Workshop manual gives you the lowdown on testing the oil pump.

    Basically connect it to a reversable drill and drill, it even give an rpm to oil ratio!

  10. #10
    steach's Avatar
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    The 787 is easy, remove two bolts for pump and put the shaft in a drill.

    The 720 is a PIA. The intake manifold has to come off.

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