I've got a mildly-built 181 Mercruiser engine in my Model A. I've got two Carter/Webber carbs on a homemade intake.
It has been running great, idling smooth and accelerating like a bat outta helloooo....but all of a sudden, it developed a dead miss on cylinder numbers one and two. When I rev it up, it clears up but has a lot less power...which indicates to me it's running on just one carb.
I took the carb apart, cleaned it (no sign of debris) and replaced it. Checked for vacuum leaks, timing, even did a compression test (It has 155 lbs on each cylinder).
The engine still runs at lower RPM like a John Deere! Rev it up and it clears up....just like before. Nothing I've done has helped. Folks, I sure could use some help!
