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  1. S

    Water pump problems

    was the key in the impeller? or did the impeller spin on the shaft?
  2. S

    2003 yamaha 90 4 stroke hesitation at mid throttle

    I assume either a port is dirty yet or an oring is leaking on cylinder one? Since it starts and idles excellent, which ports or Oring, or gasket should i look at first? trying to do this without removing carb so i dont have to resynchronize if possible. is it possible for the orings on the...
  3. S

    2003 yamaha 90 4 stroke hesitation at mid throttle

    Number one is a little lighter
  4. S

    2003 yamaha 90 4 stroke hesitation at mid throttle

    Actually, number one plug is lighter color than the rest.
  5. S

    2003 yamaha 90 4 stroke hesitation at mid throttle

    i cant figure out how to make a picture smaller on iphone. they all look similar to me. will get another set and install.
  6. S

    2003 yamaha 90 4 stroke hesitation at mid throttle

    Hello Have a 2003 90hp 4 stroke. Have had the carbs cleaned and synchronized. Still have a hesitation/ stumble between 2000 and 3000 RPM. Starts and idles great. Gas is new, 91 octane. primer bulb stays firm- no air leaks in hose. above 3000RPM it takes off full power. Im wondering if the...
  7. S

    Yamaha Tachometer testing on Alumacraft TP 17.5 2003

    I am able to get an AC voltage and a frequency reading off the output wire.
  8. S

    Yamaha Tachometer testing on Alumacraft TP 17.5 2003

    Hello, installed the new rectifier. ran a wire from the blue on rectifier to the signal wire on tachometer. use the link to see video. https://photos.app.goo.gl/3PEWfdjURVJy2RUz5 i think the tachometer is bad, whats your thoughts?
  9. S

    Yamaha Tachometer testing on Alumacraft TP 17.5 2003

    perfect! thank you very much! part is ordered
  10. S

    Yamaha Tachometer testing on Alumacraft TP 17.5 2003

    When i google the Rectifier 67F-81960-11-00 from your schematic the results all have the round connector a black wire and a red wire... the only ones that have the blue wire are for a motorcycle. no idea why... Thank you.
  11. S

    Yamaha Tachometer testing on Alumacraft TP 17.5 2003

    Here is the wires at bottom of rectifier
  12. S

    Yamaha Tachometer testing on Alumacraft TP 17.5 2003

    ok. Rectifier is SH758AA. the pictures i look up show an extra Blue wire that i do not have. would i be better off trying a different rectifier? that might be cheaper than a different tachometer but still dont know if it will work!
  13. S

    Yamaha Tachometer testing on Alumacraft TP 17.5 2003

    i will go take the rectifier off if i need to.
  14. S

    Yamaha Tachometer testing on Alumacraft TP 17.5 2003

    one last question. if i look for a different tachometer, what are the requirements? analog, pulse?
  15. S

    Yamaha Tachometer testing on Alumacraft TP 17.5 2003

    this is what i am seeing. 7 is rectifier. 3 green going in and a red and a black coming out. there is not a seperate green white wire. Thank you for you time and effort. i will look for a different analog tach.
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    Yamaha Tachometer testing on Alumacraft TP 17.5 2003

  17. S

    Yamaha Tachometer testing on Alumacraft TP 17.5 2003

    i tried the yellow wire. it has 14 volt DC and a couple AC volts. it has no response on the tachometer.
  18. S

    Yamaha Tachometer testing on Alumacraft TP 17.5 2003

    Here is what i am finding by the rectifier, 3 green wires going in- none with white stripe. took plug apart and rotated to make sure none had white stripe. there is a black ground wire that comes out and a red wire that comes out of rectifier. the only bullet connector wires i see are a yellow...
  19. S

    Yamaha Tachometer testing on Alumacraft TP 17.5 2003

    Does not have a brand. this is what i have. Specifications: Name:Tachometer Material: PVC+Stainless steel+Glass Panel color:Black Backlight Color:Red Fixing dimension: Φ85mm(3-3/8") Working voltage: 9~32VDC Working current: ≤100mA Levels of protection: IP67 Indicating Range: 0~8000RPM...
  20. S

    Yamaha Tachometer testing on Alumacraft TP 17.5 2003

    Am i correct that this motor needs an analog tachometer?
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