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  1. S

    Water pump

    Where is the water pump located on a 1986 yamaha 150 Prov?
  2. S

    Idle screw settings

    I have an 86 yamaha 150 prov does anyone know what the factory settings are for the idle mixture screws?!? <br />Thanks!
  3. S

    86' yamaha 150 prov jets

    I had work done on my boat about 8 months ago and ever since I got it back it hasnt ran right. Today I was in the process of taking out the external jets on the carbs, when my attention was brought to the small 8mm bolt head jet on the bottom of the carburetor bowl had been twisted off and...
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    Yamaha 150 prov troubles

    I have a 86' Yamaha 150 prov. I recently started the motor and it was running fine then when I let down to idle it will start running real rough and die, and the only way I can get it to start again is if I choke it?!?! I can get the motor to operating temperatures and the only way I can get...
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