Re: Im having trouble timing my 9.5 Johnson to my carb
It is what you were describing, syncing the mag plate with the throttle valve to open throttle the proper amount as timing is advanced.
Move tiller handle until center of cam follower is aligned with index mark on armature plate cam. The cam, follower, and nylon roller on throttle lever should all be in contact and throttle valve should be completely closed! If clearance exists, or if throttle valve has started to open, loosen the adjustment screw and move the throttle lever until slack is removed and throttle is closed. Then turn tiller handle to FAST and check to make sure that throttle valve is fully open.
In addition to this, ensure she is adequately sparking on both cylinders. 1/4" gap with a bright blue ZAP!! Does it? Have both coils been done?
What is the compression?
Will putting your hand (choking) over carb inlet smooth it out some?