Recent content by mbackc

  1. M

    How do I upgrade my Yamaha 9.9 2 stroke to 15 hp?

    Dear all. Im in doubt whether I can upgrade my Yamaha 9.9 2 stroke engine to a 15 hp. How can I determine whether the reed valve / reed housing is a 9.9 or 15hp ? I have read that the carb is the same. The previous owner mentioened that it might have already been upgraded but he wasnt sure. One...
  2. M

    Yamaha V4 115 HP 2 stroke - Cold starting problem!!!???

    Hello everyone. I am having big problems with starting my Yamaha V4 115 HP 2 stroke engine when cold. When its hot it starts immediately. I?ve cleaned the carbs several times thoroughly and adjusted the pilot screws according to the instruction book. The Solenoid Choker function is working...
  3. M

    Yamaha V4 115 2-stroke carburetor adjustment ???

    Hello ! I am new in this forum, but I hope that someone can help me. I have a 1998 Yamaha V4 115HP 2-stroke outboard engine. I have just disassembled the two double carbeuretors, to clean it and to mount a new repair kit. The big question is: How to adjust the carbs after re assembling ??? I...
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