Recent content by 99yam40

  1. 9

    Very weird Yamaha issue

    I am thinking a bad connection also on the 12 volt circuit +or -
  2. 9

    Very weird Yamaha issue

    I wonder what the CDI is doing with the 12V DC from battery or lighting coil? I know small 2 stroke motors do not need the battery voltage to run
  3. 9

    Charging/fuel enrichment

    measure how far the needle sticks out while cold and then hook it up to a 12 v battery for a few minutes to see if it extends. you really need to get a service manual for your motor it has all the info you need for working on the motor Yamaha service manual should have the ohms specs and other...
  4. 9

    Charging/fuel enrichment

    that is normal. the blue is tied to the Green out of the Lighting coil
  5. 9

    Cylinder 1,3 and 5 not firing on df200 v6

    very sad to know new injectors don't work as they should. most people send off their injectors to have them tested/cleaned and flow/spray tested, before buying new ones. hope you can get your money back and tanks for posting up what the problem was,I am sure it will help others reading this...
  6. 9

    Cylinder 1,3 and 5 not firing on df200 v6

    knowing the rail pressure is in spec would be good to know
  7. 9

    Yamaha 50 1985 2-stroke cooling problem

    you can look on line on how to do it, but if it is a piece of rubber water pump impellor floating around in there ,descaler will not dissolve that Before you do anything else, drop the lower unit, hook up a water hose to the pipe heading up to the power head, remove the thermostat turn on the...
  8. 9

    Yamaha 50 1985 2-stroke cooling problem

    maybe using some Ridlyme marine descaler will help before trying to tear the motor apart.
  9. 9

    No power to electric fuel pump

    well, sounds like you need to find the fuel pump relay and test that to see if it is getting key on power and if the relay is operating at all and if it has 12+ to one side of the contact and sends power out the other side
  10. 9

    No power to electric fuel pump

    that is the reason I posted to Jeff a out what he was saying
  11. 9

    9.9 to 20 HP Suzuki that doesn't go to full speed well

    I guess this oil hose you speak of is the fuel line to the motor, and you are pumping the bulb. Is this 20 also a 4 stroke motor? do you think the motor is overheating or low on oil or low oil pressure causing the RPM limiter to slow down the rpms?
  12. 9

    No power to electric fuel pump

    there should be 12v+ to the pump as long as the key is in the on position. He needs to figure out how to test to make sure he does or does not have it at the pump at key on, before he goes any other direction
  13. 9

    No power to electric fuel pump

    that was suppose to be why do you think he has power only for a moment when first turning on the key? he never wrote that.
  14. 9

    No power to electric fuel pump

    why do you think he has only for a moment when first turning on the key? he never wrote that
  15. 9

    No power to electric fuel pump

    I believe the pump gets power at key on, but the ecu tells it when to rim by completing the negative side. so, are you getting 12V + at key on?
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