I am having an issue with it running lean at idle/low rpm and falling on its face if I open it up from anything below 1/4 throttle. The low and high speed screws are supposed to be 1 1/8 turn out +/- 1/4 turn. I left the high speed alone since it runs OK up top and found the low speed screw 2 turns out. I set it back to where it should be as a baseline but it runs worse now. However, it runs pretty well with the choke on. I already ordered a genuine Mikuni rebuild kit, and the fuel filter is brand new so here are my questions:
1. Based on the fact that the thing runs well with the choke on is there anything in particular I should be looking for or at when I tear the carb down?
2. This carb has 3 mixture adjustments. Low speed mixture, high speed mixture, and idle mixture. At what point does the low speed mixture screw take over from the idle mixture?
We're going away in 2 weeks on vacation with this ski and I'd like to have it running pretty well before we go.
Thanks.
John
1. Based on the fact that the thing runs well with the choke on is there anything in particular I should be looking for or at when I tear the carb down?
2. This carb has 3 mixture adjustments. Low speed mixture, high speed mixture, and idle mixture. At what point does the low speed mixture screw take over from the idle mixture?
We're going away in 2 weeks on vacation with this ski and I'd like to have it running pretty well before we go.
Thanks.
John