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  1. 9

    Yamaha 25MSHP Fuel Pump

    take it apart and just order the parts needed to fix it gaskets,diaphrams,etc.
  2. 9

    01 yamaha 115 2 stroke lost spark cylinder 2 & 4

    you need to click to expand his replay to see the bolded part
  3. 9

    01 yamaha 115 2 stroke lost spark cylinder 2 & 4

    I would think the same place you found the specs/info on the charge coil and pulser coils would have the info for the CDI outputs Service manual
  4. 9

    Yamaha 50TLR, 2 Stroke Choke Issue

    only when the motor will not start due to the carb/prime start system will not get it going should you move the red lever to the open position. once motor starts you should move the red lever to the closed position. once back to a safe place you should fix the motor properly an owner's manual...
  5. 9

    Yamaha 50TLR, 2 Stroke Choke Issue

    2007 50TLR would have a prime start system that you do not need to do anything but turn the key to start the motor cold or warm. the red lever needs to be set to the normal auto position for it to work properly (Full CC)
  6. 9

    01 yamaha 115 2 stroke lost spark cylinder 2 & 4

    should be dc from what I remember there is a cap, diode, and resister in there but if that does not read properly it would not hurt to take a reading on AC just in case
  7. 9

    injectors for my 115 hp 2004 Yamaha engine

    as I said since cleaning vst and injectors helped fora little while they one of them had to be the problem. I have a feeling the injector screens are smaller than anything else, so I am guessing that was the problem. the gas tank, fuel, and all of the fuel lines could be a problem. may need...
  8. 9

    injectors for my 115 hp 2004 Yamaha engine

    sounds like cleaning the VST helped for a day and cleaning the injectors helped for a day. was that the same time or different times? measure the rail pressure and watch as you increase RPM until you notice the problem sounds like something in the fuel is plugging things up
  9. 9

    Thoughts on a 2001 Yamaha 200 HP 2 stroke - GOOD ? BAD ? UGLY ?

    very strange that the OP does not know what model he has, but you say you have one just like it
  10. 9

    1990 Yamaha Pro 50 2-Stroke - trouble starting, now it won't start

    my old 35 Evinrude, had something similar, but it did not rely on a pump, the solenoid itself pushed the fuel. and had a manual way to operate also if needed. I just had not run across a Yamaha that had this before Well I looked at that post from 2016, and do not remember much of what we all...
  11. 9

    1990 Yamaha Pro 50 2-Stroke - trouble starting, now it won't start

    good to hear you found the info needed to explain how it should work. where did you find it? owners manual or service manual?
  12. 9

    Reattaching an oil pump (and reservoir) too a 2004 Yamaha 50hp 3cyl 2 stroke?

    Interesting subject. the way I look at it some of the carb fuel bowls will run out of fuel before the others due to gravity allowing fuel in lines to head down and not up.( bottom one will usually have fuel while top runs out on the 3 cylinder motors I have played with). And you can hear the...
  13. 9

    1990 Yamaha Pro 50 2-Stroke - trouble starting, now it won't start

    so it fires, but does it run? at least if it fires only that one cylinder you spray the fluid into for just a second, you know that spark plug is working. by the way that fluid has no oil for lubrication, so I would not use that on a 2 stroke motor. maybe mix some oil and fuel and spray that...
  14. 9

    1990 Yamaha Pro 50 2-Stroke - trouble starting, now it won't start

    did you pay attention to what they called #41? a solenoid valve assembly instead of a Prime Start assembly. and he said he could hear something energize when he hit the switch, but saw nothing move, so it would not be a heater
  15. 9

    1990 Yamaha Pro 50 2-Stroke - trouble starting, now it won't start

    have you tested spark to the plugs? inductive timing light or inline spark tester would give indication if the plugs are getting spark or not
  16. 9

    Yamaha 115 4stroke

    the remote tank pump should have 12V+ with the key in the on position. the e switch provides the negative/ ground so the pump can run just like the oil level float switch and oil control module. Find the Yamaha Service manual for your motor
  17. 9

    1990 Yamaha Pro 50 2-Stroke - trouble starting, now it won't start

    But why does the parts page list a solenoid valve assembly instead of a Prime Start assembly if it is a true Prime start system I am use to seeing?
  18. 9

    1990 Yamaha Pro 50 2-Stroke - trouble starting, now it won't start

    so it sounds like there are no choke plates on the carbs or linkages that get moved when you activate that switch. maybe this motor has some type of extra fuel injection operated with that switch. Normal prime start systems I have seen use the crankcase pulse to operate the diaphragm pump on...
  19. 9

    1990 Yamaha Pro 50 2-Stroke - trouble starting, now it won't start

    if this motor does have the prime start system, you do not need to do anything but turn the key switch to the start position to start the motor. Since that electrical part they call a solenoid valve is different than the heater unit on a prime start system, I have no idea how this motor is...
  20. 9

    1990 Yamaha Pro 50 2-Stroke - trouble starting, now it won't start

    from what I saw on another web site(your link no workie), the 1990 pro50LD does not have a choke, it has the Yamaha prime start system. Or some type of solenoid valve with a pump on the bottom carb So I have no idea what you mean by Flicked the switch for the choke & adjusted the choke lever to ON
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