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  1. B

    Mariner HP & Model decode.

    1978 model year motor.
  2. B

    Yamaha 90 2 Stroke No Spark

  3. B

    Yamaha 90 2 Stroke No Spark

    A swith can fail is one of several different ways. The starter portion may work while the kill switch portion may have failed. If the kill switch circuit (white wire) has chafed to ground anywhere along its path from the kill switch/key switch to the CDI, the CDI will think that the kill switch...
  4. B

    Yamaha 90 2 Stroke No Spark

    A 90 HP Yamaha two stroke does not have a TPS. Throttle Position Sensor.
  5. B

    Yamaha 90 2 Stroke No Spark

    A 90 HP Yamaha two stroke does not have a shift cut switch or a shift position switch.
  6. B

    Yamaha 90 2 Stroke No Spark

    Neutral Safety Switch - In the control box. To prevent a motor from being started in gear. Shift Cut Switch - On some motors. Causes a motor to misfire some cylinders to assist in shifting the motor from in gear to neutral. Shift Position Switch - On some motors. Tells the brains of the motor...
  7. B

    Identifying a 75hp 2stroke (i think) 2005 with missing model number (and it won't start )

    No choke on the OP's model. Uses an automatic enrichment device known as Primestart. Pressing the key in does nothing.
  8. B

    Identifying a 75hp 2stroke (i think) 2005 with missing model number (and it won't start )

    https://www.yamaha-motor.ca/en/service-parts
  9. B

    Identifying a 75hp 2stroke (i think) 2005 with missing model number (and it won't start )

    https://www.yamaha-motor.ca/en/service-parts
  10. B

    Identifying a 75hp 2stroke (i think) 2005 with missing model number (and it won't start )

    You are to be commended for helping us help you. Engine ID is 6H0L 952329. Model 75TLRY. Distributed in Canada and Europe. See if this works for you. https://ypec-sss.yamaha-motor.co.jp/ypec/ypec/b2c/html5/app/en_CA/parts-search/index.html
  11. B

    Carburetor's

    From a Mercury Service Manual;
  12. B

    Yamaha F150 overhauls?

  13. B

    Voltage regulator vacum hose

    Your service manual shows it to be just a vent hose.
  14. B

    Voltage regulator vacum hose

    What is the engine serial number? Some fuel pressure regulators are plumbed to the intake manifold and some are simply vented to the atmosphere. Perhaps vented through the hose.
  15. B

    Voltage regulator vacum hose

    Voltage regulator or fuel pressure regulator?
  16. B

    Yamaha F150 overhauls?

    www.jasperengines.com
  17. B

    Carburetor's

    For instance
  18. B

    Carburetor's

    What is the engine serial number? If you check the Mercury parts catalog I suspect that you will see that the carburetors have different part numbers. To indicate which carburetor goes into which position.
  19. B

    F90 shaft swap

    Changing the power plants is the easiest and fastest way to go.
  20. B

    F90 shaft swap

    P90?
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