Search results

  1. 9

    Hard start when warmed up

    not sure about the zuks, but some motors have a fuel cooler and if that does not cool things properly the gas in the VST can boil out shoving all of the vapors into the intake causing too rich envirment during restart
  2. 9

    Carburetor question on restoration I’m working on 1992 40 hp MSHQ Yamaha

    the bottom(#3) looks a little darker than the top 2 which are white. pin hole in the pump diaphragm will let extra fuel into #3 crankcase that or #3 needle and seat not closing off completely could also either of those will not let primer firm up completely
  3. 9

    F250BTUR Bad Rattle

    I have never messed with digital controls, so you will need to find someone familiar with that set up as far adjustments. I would talk with the mechanic that installed it, letting him see and hear what is happening I have no idea how the shift happens and if a bad connection could cause...
  4. 9

    F250BTUR Bad Rattle

    who hooked up the new digital controls? did this motor have that type of controls before the new ones? Looks like the video shows it goes into gear cleanly, and starts pushing the boat. if the clutch dogs were not engaging properly they would not hold at higher RPM. is it possible that the...
  5. 9

    What is shaft length, 20", 25" or 30"

    L = 20" S = 15" U = 30" X = 25" 1st X =25 last X means 1999
  6. 9

    Carburetor question on restoration I’m working on 1992 40 hp MSHQ Yamaha

    time to find out
  7. 9

    F250BTUR Bad Rattle

    does not sound like lower unit problem to me, it goes into gear just fine. does it keep making that noise while idling along, or is it just some seconds after putting into gear ?
  8. 9

    2013 Yamaha 25hp 4 stroke running hot

    over heat should not shut off a motor. maybe if you let it overheat to the point it locked up it would. if you can get it to start on muffs with the cowling off you could see where water is coming from
  9. 9

    1997 Yamaha C40 2 stroke tilt unit repair kit.

    any Yamaha dealer or find an online place. boat.net is a place I have used before
  10. 9

    2018 Yamaha 25 hp. 4 stroke will not run at slightly above idle.

    boat, load, prop are all part of what a motor can do. are you sure you have the right prop for what you are using the motor for?
  11. 9

    F250 TXR RAN OUT OF FUEL, NOW CANT GET FUEL TO INJECTORS

    running that pump with no fuel in the VST probably smoked it. it uses the fuel to lube and cool the pump/motor. but you need to make sure the pump is getting voltage and the ECU is giving it a ground path
  12. 9

    1997 Yamaha C40 2 stroke tilt unit repair kit.

    there is no kit, you buy what parts you want or need
  13. 9

    Carburetor question on restoration I’m working on 1992 40 hp MSHQ Yamaha

    I sure hope the drive shaft for that pump was removed also. with no oil running thru the pump and it is being driven still could be bad
  14. 9

    Carb-mounted choke solenoid

    it is a 32 year old motor, you may not find a new one
  15. 9

    Yamaha 15 mounted too high

    4 strokes are usually rated at a higher RPM than the 2 strokes is why I asked what the motor is 6K may be fine if it is a 4 stroke,
  16. 9

    Carburetor question on restoration I’m working on 1992 40 hp MSHQ Yamaha

    Yamaha mechanical fuel pumps use the pulse from one of the cylinder crankcases to operate the fuel pump. most are mounted on the side of crankcase, but this one is mounted on the bottom carb so I assume it is still ported to either the crankcase or the the reed chamber to get the pulses. if the...
  17. 9

    Carburetor question on restoration I’m working on 1992 40 hp MSHQ Yamaha

    I am not sure what you are trying to say. are you saying that one fuel pump will flood all carbs? the other poster was talking about if the pump diaphragm leaks, it will flood #3 crankcase and not affect all 3. which is correct.
  18. 9

    Carburetor question on restoration I’m working on 1992 40 hp MSHQ Yamaha

    no worse than metal tanks back in the day
  19. 9

    Yamaha 15 mounted too high

    is this a 4 stroke or a 2 stroke 15? seems not many post up the true motor's model # anymore so it is hard to tell
  20. 9

    Carburetor question on restoration I’m working on 1992 40 hp MSHQ Yamaha

    Tank pressure should not flood a motor. I had an old metal tank before on a 35 hp Evinrude that the primer bulb blow up on when I stopped at my parents house and let it sit in the sun for a few hours, but it never flooded the motor
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