Quote Originally Posted by DockShootinJack View Post
Certainly sounds like a fella needs 2 pairs of hands at least.
Yamaha does not mention using pencils that comes from tuning old Evinrude Crossflows. I carried it over to Yamaha tuning to get 3 cylinders to idle perfectly. The power packs calculate the piston position on cylinder #2, it does not have it's own trigger. If the carbs are super perfect but the Pack is slightly off the engine still idles like all three cylinders has a trigger. After that I have used pencil erasers to hold the butterflies ever since. Also when you go to tighten the linkage lockdown screw (usually lefthand thread) you have to hold the butterflies open off the lands so the torque from the screwdriver does not change the linkage setting you just worked to get perfect. I can get very tricky to do on larger outboards.