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  1. 9

    1989 Yamaha pro 50 bogging down

    go thru the carbs again, something has plugged up a jet
  2. 9

    2006 Yamaha F115 fuel leaks from VST

    easiest way to find where it is coming from is to remove the cowling, clean everything up and let it dry. have someone turn the key on and watch for any leaks. if no leaks seen, have them fire it up while on muffs while you look for leaks. fire extinguisher may be good to have handy just...
  3. 9

    2000 yamaha 115, 2stroke won't run without choking

    most people would think carbs needs cleaning
  4. 9

    Carb leaking fuel from hole (fairly large run of fuel)

    might want to look at the fuel pump & lines to make sure something hiding in there does not hit the cleaned carbs after starting up
  5. 9

    Carb leaking fuel from hole (fairly large run of fuel)

    sounds like you hit the nail on the head
  6. 9

    Yamaha 130 has random miss at idle

    well if you have good compression ,spark at correct time, and the carbs work well on the other motor, only thing I can think of is bad seal between crankcases on the crankshaft. I believe 2 and 3 are next to each other on the crank
  7. 9

    Yamaha 130 has random miss at idle

    if the wires in the harness were to short across 2 & 3 or be crossed somehow, you would see it with the timing light lighting up the wrong TDC area if you paid attention
  8. 9

    Yamaha corroded ground wire.

    I would not like to have a steel connector on a saltwater motor/boat, but even the lead to copper connections go bad sometimes also. I have seen cables go bad in the middle of the cable too
  9. 9

    Yamaha corroded ground wire.

    bad connection heats up that connection and caused it to burn and get brittle. if you check and clean/lube the battery connections like you should this would not happen
  10. 9

    Yamaha 130 has random miss at idle

    if this motor runs the same on 2 cylinders and 4 cylinders, it is not just a random miss "I can unplug both #2 and #3 plug wires and motor does not change in the way it runs. One video attached shows just the miss, the other shows motor running with 2 plug wire removed with no change" did you...
  11. 9

    Yamaha 130 has random miss at idle

    a timing light hooked to a plug wire while this happens will show if spark is a problem on that plug. or you can keep throwing parts at it to see if you can get it to stop doing what it is doing you need to know if you have a spark problem or not
  12. 9

    Yamaha 130 has random miss at idle

    you will have to monitor spark and timing on each cylinder while the problem is there
  13. 9

    yamaha 4 stroke 9.9 bogging

    loosing spark or too much or not enough fuel in a cylinder timing light should indicate if spark is hitting and if it is hitting at the correct time
  14. 9

    Yamaha 130 has random miss at idle

    for a cylinder to fire and burn properly you need good compression, good spark at the correct time, and the proper fuel to air ratio. use a timing light to verify spark for each cylinder it hitting when it should. if they all are then you are left with too much fuel or not enough fuel in some...
  15. 9

    No voltage from just replaced coil - FT9.9GE

    can you show what DVA adapter design you followed? I have heard of some using 2 resisters before that did not work as well. seems when you changed the connectors is when the no start happened maybe?
  16. 9

    Value of Yamaha 25 hp outboard?

    list the rig higher than you are willing to take for it so you can come down some to make the buyer happy he talked you down some. listing them separate means you have to find someone with a boat that needs a motor. you will find more people wanting a complete rig
  17. 9

    No voltage from just replaced coil - FT9.9GE

    are you sure the charge coil you put in was the correct one? it did not have the correct wiring. did the charge coil match the old one you pulled out and did fit properly? did you set the meter on DC when taking the peak readings? did you spin the motor over fast enough to get a good reading...
  18. 9

    No voltage from just replaced coil - FT9.9GE

    service manual shows minimum peak voltages. being higher is OK as long as the reading is not lower that the minimum spec given
  19. 9

    How hard is it to replace a broken water tube?

    well that sounds like they do not recommend using anything on the gasket. if they wanted people to use something they would list what to use
  20. 9

    2005 Yamaha 200hp HPDI

    just because yds says it wants all cylinders to fire does not mean they are. you need to see if all are getting spark and fuel some how. spark should be easy, with a timing light or spark tester not sure how to ckeck fuel maybe monitor the injector pulsing
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