Recent content by Monstermash

  1. M

    D722 jetboat motor issue

    You'll never guess what I found.. Sheared plunger barrel guide pin. Effectively allowing plunger barrel to spin shutting down one cylinder. Man that took a while to figure out.
  2. M

    D722 jetboat motor issue

    Yes. Flowing free. Checked that. These injectors are brand new Bosch injectors. Will put another one in.
  3. M

    D722 jetboat motor issue

    Ok update on this problem: 1. Turned fuel up to make sure motor wasn't starving 2 did valve adjustment. Valves were not too bad. #1 valve was very loose. Put it in spec. 3. Took apart injection pump to verify there wasn't a broken plunger spring or something else getting hung up...
  4. M

    D722 jetboat motor issue

    Yeh this motor has been running amazing with the turbo. It just started this intermittent isssue that I'm trying to get to the bottom of.
  5. M

    D722 jetboat motor issue

    Turbo is add on, 15-20 psi, runs great when boosts up, almost zero blowby at idle or revving not under load
  6. M

    D722 jetboat motor issue

    Brand new Kubota injectors, injection pump is Kubota and has 10 hours on it. As soon as motor is not under load; revs fine idles fine, no white smoke
  7. M

    D722 jetboat motor issue

    runs perfectly at idle, also when boat is out of water not under load it revs right up perfectly. Will crack injector lines to determine if one isn't fueling right
  8. M

    D722 jetboat motor issue

    Runs amazing when it boosts up.
  9. M

    D722 jetboat motor issue

    Hello. Have a d722 that is running weird under load. White smoke, motor shakes, then dies. New fuel, fuel filter, lift pump good. Here is a video of motor running if you have any thoughts: Motor running bad video link