99yam40's latest activity

  • 9
    99yam40 replied to the thread 1986 Suzuki DT75.
    I am not a Suzuki guy, but you need to find a service manual for your motor. You should have a service manual for all motors you own if...
  • 9
    99yam40 replied to the thread Please help with HPDI issues.
    what tells the ECU the motor is getting proper fuel on these motors? does it have an O2 senser? maybe nothing. it depends on the High...
  • 9
    99yam40 replied to the thread Please help with HPDI issues.
    those motors limit RPM in neutral by cutting off more cylinders that just the 2 it drops in neutral make sure the motor knows when you...
  • 9
    99yam40 replied to the thread Please help with HPDI issues.
    if that is true, then I would be looking at fuel pressure being too high or what is telling the ECU that it is running lean making it...
  • 9
    99yam40 replied to the thread Yamaha S200TXRU.
    The U says it is a 96. not sure what you mean by plug and play with a injected motor
  • 9
    99yam40 replied to the thread 25 HP Yamaha 4 stroke backfire.
    so moving the throttle does not move the plunger? it was just a guess since I have not worked on that motor myself. sometimes running...
  • 9
    99yam40 replied to the thread 25 HP Yamaha 4 stroke backfire.
    I guess you removed the plug so you could remove, clean, and adjust the pilot screw. that plunger mechanism has me thinking that maybe...
  • 9
    99yam40 replied to the thread 25 HP Yamaha 4 stroke backfire.
    is this a carbed motor or injected? giving all motor model ID info helps heck we have no idea what year even
  • 9
    99yam40 replied to the thread 2009 yamaha 225hp no power.
    as always, start with compression, then test spark and the timing of that spark if all of that is good then you are left with a fuel...
  • 9
    99yam40 replied to the thread F115 - no signal to #2 injector.
    sounds to me like Boscoe says the injectors should have power all of the time but the ECU fires them by furnishing the ground
  • 9
    99yam40 replied to the thread Yamaha F20 no spark..
    yes they are some of the coils under the flywheel. so are the pulsar coils there are also lighting coils under there that create the...
  • 9
    99yam40 replied to the thread OX66 O2 Sensor reading is off.
    giving complete motor info on what motor you are dealing with may help. no one can look up what you have with that info you gave
  • 9
    99yam40 replied to the thread Yamaha F20 no spark..
    if it fires and runs when cold, I would think you have a fuel to air mixture ratio problem or timing problem maybe. but it is best to...
  • 9
    99yam40 replied to the thread Yamaha OX 66 Trim & Tilt motor cylinder.
    I would remove and send off to have it repaired if it is worth fixing. if not, then find a replacement.
  • 9
    99yam40 replied to the thread Yamaha 115 stalled at idle.
    lost prime, maybe sucking in air someplace. or the lift pumps need replacing
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