Re: 1962 40hp runs rough at mid speed
I've been plagued with the same symptoms, revs up great gets on plane but to back off a bit to find a nice cruising speed and she runs a little rough, classic carb symptoms, I was trying to find out what size orifice plugs (high speed jets) are supposed to be in there but can't find data another thing I was looking closely at is play in the distributor shaft and rate of timing advance, have you performed link-n-sync? Hopefully you get some good input beyond the basics, I'll be interested.
