I have a 1986 Merc 25 that bogs after about half throttle, and seems to be getting progressively worse. I am absolutely certain it is not a fuel delivery issue, that was the first thing we checked. I have changed the power pack, coils, and plugs. All I think left is the trigger and stator, which of the 2 is most likely the issue? Or should I just change both as it is a crapshoot and will have the flywheel off anyway.