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  1. #1

    Efi 1390 locked power valves or upgrade?

    I've got a 03 1390efi Rossnemo TBs (flyboys old ski), Can I lock the valves out without loosing performance and how do u do this. Seen it on some bb but no post ever.i had waterwoodys modified valves hit the #3 piston idling at boat ramp just stopped and second time it happend now. Crank is in spec. Thx. Motor on bench waiting for some ideas.


  2. #2
    I was thinking r&d valves but 150 a kit.

  3. #3
    WATER WOODY's Avatar
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    If you had a pv hit the piston at idle, you have a serious problem! There is 2mm clearence after i cut the pv's from the pistons. I would pull the pv out and check for wear on the shaft crown allowing the valve to drop.

  4. #4
    Quote Originally Posted by WATER WOODY View Post
    If you had a pv hit the piston at idle, you have a serious problem! There is 2mm clearence after i cut the pv's from the pistons. I would pull the pv out and check for wear on the shaft crown allowing the valve to drop.
    Yea I guess they went threw it I bought it and it been runnin great until this happens I pulled it apart everything fine except valve sticking into jug 1/4 inch. Cranks fine. One of the bolts on the jug was a lil lose maybe that was the cause . Alot of aluminum everywhere . Jug is fine just need a piston and valve just like before it happens to flyboy ,Chris and now me. Crank is fine had crank works check it out.

  5. #5
    WATER WOODY's Avatar
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    I will be around Monday if you need any help, hit me up.

  6. #6
    U will be around panama city

  7. #7
    Can I make it a non pv by locking out valves .

  8. #8
    WATER WOODY's Avatar
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    No, im in Nevada. I meant ill be 'around' here at the shop Monday. 775-315-0222 Kevin

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