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  1. #1

    pop-off with 1.5ns & 95g

    Couple posts on here said with 1.5ns and 95g spring I should get avg of 42-45psi. However, it's not popping until 50-51PSI on all 3 carbs.

    Should I trim the springs a little to get it lower or will ~50PSI pop-off be OK?


  2. #2
    krispaintballz's Avatar
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    are the spring arms level with the bodies? Double check with a razor blade.

    http://www.greenhulk.net/forums/showthread.php?t=62751

  3. #3
    yes... using the razor-blade-method they are level. One needed to be bent a tiny bit.

    I'm going to mess with them again in the morning and I'm going to try another gauge.

  4. #4
    They tested the same with the other gauge.

    51, 50, 45

    I cut tiny bits of the spring to get the first 2 down. They're now 43,44,45

  5. #5
    yet another update...

    So after all that crap, it turns out Riva sent me the wrong springs!

    I ordered 730-03027-T and they sent 730-03027....

    115g vs 95g

    That would explain it.


    So I've got the pop-off PSI's set to ~44psi after cutting some of them. Should I leave them or should I get the right 95g springs? I've got the carbs all rebuilt and back on the rack for install tomorrow morning. If I wait for the 95g springs, it will be another week of waiting.

  6. #6
    Moderator beerdart's Avatar
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    How much did you cut off?? If it were my boat I would get the 95's Cutting springs changes the free height and spring rate. With the stiffer shorter spring the needle may not open far enough for the flow demand.

  7. #7
    Quote Originally Posted by beerdart View Post
    How much did you cut off?? If it were my boat I would get the 95's Cutting springs changes the free height and spring rate. With the stiffer shorter spring the needle may not open far enough for the flow demand.

    With one I cut the 2 bottom "solid" rings and maybe 1/2 a coil, and the other maybe 1/4 of a coil...

    1/8" of an inch max total.

  8. #8
    Ramps's Avatar
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    Thumbs up Springs...

    I thought I would be smart and cut my springs to get my correct pop off, but now that beerdart mentioned the spring height etc... I would put the correct springs in..And I will do the same I think that it is giving less control over throttle response with the cut springs.

  9. #9
    krispaintballz's Avatar
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    Quote Originally Posted by BlitzK View Post
    yet another update...

    So after all that crap, it turns out Riva sent me the wrong springs!

    I ordered 730-03027-T and they sent 730-03027....

    115g vs 95g

    That would explain it.


    So I've got the pop-off PSI's set to ~44psi after cutting some of them. Should I leave them or should I get the right 95g springs? I've got the carbs all rebuilt and back on the rack for install tomorrow morning. If I wait for the 95g springs, it will be another week of waiting.

    Order the right ones. But get them through Fox Distr., Inc. 50 N. 17th St.
    St. Charles, IL 60174 (630) 513-9700. They are a lot cheaper and fast shipper. Not to mention they are a mukuni dist. Cut out the middle man.

    Take that back riva is a dist too. But i think they are still a bit cheaper.

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