Above Forum Ads



No announcement yet.

Testing Pop Off Pressure

  • Time
  • Show
Clear All
new posts

  • Testing Pop Off Pressure

    I am not quite understanding how to test the pop off pressure. According to the manual, I am supposed to hook the tester up to the fuel pump itself and check for 15PSI hold point. But how do I check each individual carb? Do I need to remove each cover to inspect the needle valve lifting up while under pressure? Manual page attached...appreciate any help...
    Attached Files

  • #2
    I don't like that method. It will only show the lowest pop-off pressure of the whole set of carbs. Take them off and test each one individually.
    '15 Kawi Ultra 310X
    '99 Kawi Ultra 150 (2)
    '10 Kawi Ultra LX, '13 Kawi Ultra LX, '13 Kawi Ultra LX parts 'Ski
    '04 Kawi STX 15-F, '06 STX 15-F (2)
    '91 Kawi Jet Mate
    '97 Yamaha Exciter 220 (Boat)
    '99 Yamaha Exciter 270 (Boat)
    '78 Nacra 5.2 Catamaran
    '05 Windrider WR-10 Trimaran, '05 Windrider WR-16 Trimaran
    ... and that's just the boats! I'm living proof that you can have too many toys!


    • #3
      Well I am glad I tested the pressures! First I found a leak on my Niche fuel pump. Tightening the security screws fixed that. Then my number 3 cylinder was popping off at 25psi or so...not sure what was wrong with the spring, but a replacement got it back in line with the others...everything seems to pop off 16-18psi which is close enough for me. I actually left all the carbs connected and removed the covers. I had an extra set of hands hold down the needles that I was not testing...I really did not want to disassemble all three carbs again.

      Hopefully the rebuilt engine goes back in today!