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  1. circlehook

    Idle mixture screws adjustments 135 hp 1990 Mercury

    Originally my problem started with the fuel lines deteriorated on the inside and clogged everything I replaced all the hoses and even rebuilt the fuel pump one of the diaphragms had a small hole in it also
  2. circlehook

    Idle mixture screws adjustments 135 hp 1990 Mercury

    I set the floats to what the factory manual called for, new float pins, and gaskets. Cleaned thoroughly and used compressed air tru the air passages. I am stumped
  3. circlehook

    Idle mixture screws adjustments 135 hp 1990 Mercury

    Oh and then at wide open throttle I only get about 19 mph where I had 25-29 at one time I thought the plugs might be getting fouled at the initial start up
  4. circlehook

    Idle mixture screws adjustments 135 hp 1990 Mercury

    I didn’t check the thermo valve didn’t know there was one. And it smokes really bad a first start up and lessen after a while but it smokes out 3 entire houses no mosquitoes here
  5. circlehook

    Idle mixture screws adjustments 135 hp 1990 Mercury

    Compression is good in all cylinders & spark also. I am going to change the plugs but there not all that old. I also linked & sink the linkage. And the timing is spot on.
  6. circlehook

    Idle mixture screws adjustments 135 hp 1990 Mercury

    I have very heavy smoke in the exhaust it’s brand new gas and proper oil quantity and with the air box open you could see lots of fuel flowing out of the carburetor I had them apart and set the float levels new gaskets, float & needle valves etc the only thing I didn’t do was touch those idle...
  7. circlehook

    Idle mixture screws adjustments 135 hp 1990 Mercury

    Hello I need to adjust the idle mixture screws on my 135 hp Mercury I Have a tachometer does this help and is there any sequence between the three carburetors Bob
  8. circlehook

    Early 90 hp Yamaha tachometer wiring diagram

    I know there is a Signal I called CDI Electronics and they said to use a DVA meter and from the gray/Signal wire & ground I should have 8-20 volts I had 11.9 so the signal is there I am just not hooking the tachometer correctly
  9. circlehook

    Early 90 hp Yamaha tachometer wiring diagram

    I tried this and also reversed the trigger/ Gray lead and the 12v red lead both ways and nothing the black lead was ground
  10. circlehook

    Early 90 hp Yamaha tachometer wiring diagram

    Oh it came off a early 90 hp Yamaha, and I would like to see if I can get it to work on my 1980 135hp Mercury
  11. circlehook

    Early 90 hp Yamaha tachometer wiring diagram

    So then “b” doesn’t get a wire, “g” is ground, and the (2) top center are the positive & trigger. I will try that.
  12. circlehook

    Early 90 hp Yamaha tachometer wiring diagram

    So is “b” for power, “4” is for trigger, “g” is for ground does that sound correct
  13. circlehook

    Early 90 hp Yamaha tachometer wiring diagram

    Does anyone know what screws are the trigger, ground, and power screws it’s a early Yamaha tachometer Thanks bob
  14. circlehook

    Early 90 hp Yamaha tachometer wiring diagram

    Does anyone know what screws are the power 12v, trigger screw, & ground screw
  15. circlehook

    Early 90 hp Yamaha tachometer wiring diagram

  16. circlehook

    1964 18HP starter

    does anyone have or know where I can obtain the parts to make my 18 HP a electric start engine Thanks Bob
  17. circlehook

    reed valves

    question when a reed valve goes bad will there be a tell tale sign, like how will a 6 cylinder act if one or two were bad. my engine has no mid range RPM with out stalling idle to 1,500 RPM & 2,500 to 4,800 RPM is ok, but in between she stalls, 225 mercury offshore, 1996 2 stroke, thanks bob
  18. circlehook

    Stallling 225 Mercury Outboard

    I have a 225 HP mercury offshore outboard, and it idles good up to 1,500 RPM, and if you can get her up to 2,500 RPM she runs fine all the way up to 4,800 RPM, but between 1,500 and 2,500 she keeps stalling and really no power, every thing from the filler caps right to the primer ball is brand...
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