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  1. 9

    yamaha 2000 25hp f25eshy no fire

    motor needs good compression, good spark at the correct time, and the proper fuel to air ratio in the cylinder to it to fire properly. you need to start troubleshooting to see what is good and what is not
  2. 9

    White Smoke😑

    seems you said it died and produced white smoke. "But when I put it into gear or accelerate, it will die and produce lots of white smoke." now you say it produces white smoke at idle and and then dies which is it? And I have a hard time believing you cannot see where the white smoke is...
  3. 9

    2000 Yamaha 50HP bad center cylinder

    very true, all you can do is visually inspect for discoloration on rod ends and crank bearings. maybe feel if they are rolling smooth I guess if running lean on a C motor would be a lack of enough oil along with not enough fuel since they are premixed someone forgetting to add oil and...
  4. 9

    White Smoke😑

    blue smoke and running rough would be what I would be chasing not water right now. unless you find signs of water in the cylinder or on the plug itself. white smoke after it dies, I am not sure what that is. steam I would expect while it is running if water was getting into a cylinder
  5. 9

    2000 Yamaha 50HP bad center cylinder

    you did not say if you see any damage to #1 AND #3 we cannot see in pics. are you going to open it up and look at bearings ? that will help tell if lack of oil was even part of the problem. I believe Rodbolt once said lack of oil will get bearings before pistons
  6. 9

    6Y5-8350T-D0-00 Tach setting please

    blue is normally for a light in tach. red is normally 12V +battery voltage to the key switch
  7. 9

    2000 Yamaha 50HP bad center cylinder

    what about running too lean do to carb plugging on only #2 ? that may cause #2 to run too hot and being between the other cylinders it got hotter than the other 2. do you see any damage to the other cylinders we cannot see? but as others said, you need to take it apart to see if bearings and...
  8. 9

    Need to buy a CDI for 1988 Yamaha

    the kill switch and ignition switch grounds the spark voltage to kill or keep the voltage from reaching the spark plugs to keep the motor from running you may want to be sure the switches and/or wire to the CDI is not grounding keeping the voltage from showing up
  9. 9

    White Smoke😑

    and then a leak down test to see if combustion chamber is leaking into the cooling system.(head, head gasket etc) could be in the exhaust, but not likely
  10. 9

    White Smoke😑

    I have the feeling dingbat, has never worked on a motor this big before
  11. 9

    1995 yamaha 200hp v6 2 stroke txrt spanner nut 6g5-5483-00 and claw

    it holds the carrier into the lower unit case. yes it is needed
  12. 9

    Need to buy a CDI for 1988 Yamaha

    well if no one makes them any more, you are stuck with trying to find a used one, or finding a different motor. are you sure the cdi is bad?
  13. 9

    Not going over 2 rpms

    never seen a motor that could run at only 2 rpm. most idle at around 700 to 800 rpm but yes over heat or low oil level will limit rpm on most motors that have that system
  14. 9

    Need to buy a CDI for 1988 Yamaha

    try CDI Electronics to see if they make one for that old motor
  15. 9

    Wiring Nightmares

    How did an o ring fix his wiring mess?
  16. 9

    2000 Yamaha 9.9 2 stroke won't start

  17. 9

    Yamaha 2004 150 carb

    you will have to do some trouble shooting to figure out what is happening, but nothing I know of normally would do that. since low oil and overheat are the only things that should set the alarm that I know of it should be easy to figure out which of the switches or wires is doing that. seems...
  18. 9

    Yamaha 2004 150 carb

    backing off resetting something letting it run back up makes no sense too me. when does the alarm shut off? do you have gauges that indicate ? have you watched the level in oil tank?
  19. 9

    Bonding wire

    bonding wires are not meant for 12 v current carrying, they are for corrosion protection. look elsewhere for your no starting problems, battery connections or neutral start switch in controls
  20. 9

    2000 Yamaha 9.9 2 stroke won't start

    yes top , or bottom crank seal can keep one of the cylinders or the middle seal will keep both cylinders from drawing air and fuel thru the carb into the crankcase and into the cylinder. as I posted before you can send the crank off to be rebuilt with new seals and bearing. my C40 cost me about...
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