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  1. 9

    yamaha f150 running problem

    1st thing you need to do is find out if the rail pressure is in spec when the problem shows up
  2. 9

    yamaha f150 running problem

    My only thought is the motor runs fine with no load on the motor, but with a load there is not enough fuel to handle the load make sure the fuel rail pressure is in spec
  3. 9

    Yamaha 130 2 stroke oil injection question

    I would think your service manual would have a testing procedure on the volume of the oil being produced to those outlets. But you could premix some fuel to run on and monitor the level on the motor tank that is lowers to see that the proper ratio get used for the gallons of fuel used. double...
  4. 9

    Did I knock lower unit out of neutral during water pump service?????

    yes the prop shaft should move freely when in neutral
  5. 9

    Did I knock lower unit out of neutral during water pump service?????

    just drop it again and set the lower into neutral along with the controls and then reinstall
  6. 9

    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    should have used the old one when he put the new carb on, old is better than none
  7. 9

    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    who replaced that center carb? you or someone else? hope it is that simple of a problem
  8. 9

    Aren't my ignition coils defective?

    My thoughts ,if you were getting water into a cylinder you would see signs of it on the spark plugs.
  9. 9

    40 hp 2 stroke open/close switch?

    run it in the normal mode. open is to help get the motor runing if you cannot get it to start when in normal due to plugged up automatic system once started in open you should turn it to closed or it will run too rich
  10. 9

    40 hp 2 stroke clicking/popping noise

    possibly a lean sneeze probably because you had the red lever in the closed position and the automatic enrichment system could not add extra fuel when motor is cold. or you have other carb problems
  11. 9

    Aren't my ignition coils defective?

    fuel pumps and fuel lines, and then carb cleaning. I would go for it. you know BOAT stands for Break Out Another Thousand
  12. 9

    Did the factory connect my fuel system wrong, please help!

    need to be asking the people that put it together. I am sure no one here worked there
  13. 9

    Loud metal knocking sound on yamaha F250

    if you have a warranty, why are you asking here? you are the only one that can inspect or have it tested , we sure cannot
  14. 9

    Aren't my ignition coils defective?

    depends on what is causing the cylinder to drop. a flooding carb and a leaking fuel pump dumping fuel into the crankcase that provides the pulse to operate the pump , will cause over rich fuel problems to some cylinders Idle jets and passages, off idle ports, and main jets can affect the motor...
  15. 9

    2000 Yamaha F100 four stroke oil alarm goes off at first and then goes away

    good to here it was an easy fix. I guess you found a loos electrical connector. never know what you can find as a problem
  16. 9

    Aren't my ignition coils defective?

    get the DVA or other meter to get the peak voltage reading to make sure everything is doing what it should on the electrical. test what you can and if no problems found with that then chase the fuel
  17. 9

    Aren't my ignition coils defective?

    checking at idle will not ensure there are no problems at higher RPM and under load
  18. 9

    Aren't my ignition coils defective?

    if there is not the proper fuel to air ratio in a cylinder even good spark cannot ignite it
  19. 9

    2001 Yamaha 50hp tlrz 2 stroke with prime start system starts and dies

    does it continue to run if put in the open position like you 1st told us back in 2021? also verify what the timing is doing with a timing light. timing does change up as the motor starts, idles, and then warms up. plus the light will show if the spark drops, but may be hard to tell if spark...
  20. 9

    Aren't my ignition coils defective?

    I have no idea if your motor has low and high-speed charge coils sending voltages to the CDI, but taking those peak voltages should tell you if there is a problem if you do have separate low and high-speed charge coils. with both motors doing it it is hard to believe both had the same type of...
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