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  1. 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?
  2. 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...
  3. 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...
  4. 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
  5. 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
  6. 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
  7. 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?
  8. 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...
  9. 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...
  10. 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
  11. 9

    Can I add an Oil Pump to a Yamaha CV85

    oil pump is driven off the crankshaft, so if crank is turning the pump should pump oil as long as the pump has oil to pump. the alarm system has no idea if the motor is pumping oil , just knows what the tank oil level is. That is what sets the alarm. keep the oil system clean and it works...
  12. 9

    Can I add an Oil Pump to a Yamaha CV85

    best to sell it and buy oil injected one you want
  13. 9

    White Smoke😑

    I usually blow compressed air up it while idling on the muffs hoping to push it around and out with the normal cooling water flow
  14. 9

    White Smoke😑

    from what you are saying seems like there is a lot of something in there that keeps plugging it up
  15. 9

    White Smoke😑

    I agree, why is the indicator not showing the water pump is actually pumping water
  16. 9

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

    when the key is on yellow is 12V+ when the main relay is energized red with yellow stripe is also 12V+
  17. 9

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

    yes that is why I said to the key switch, not sure why it would have red to the tach unless it needs + all the time for something
  18. 9

    Temp difference port to stbd ,head ,Tstat .2000 200hp Saltwater series 2 stroke

    I believe you are posting in the wrong thread
  19. 9

    Temp difference port to stbd ,head ,Tstat .2000 200hp Saltwater series 2 stroke

    normal from what I have read
  20. 9

    yamaha 2000 25hp f25eshy no fire

    your definition of fire must be different than mine. without all 3 of those things I mentions the cylinders will not fire and burn properly. maybe you are speaking about no spark to the spark plugs
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