Depends on the reasons why it is down; which BTW 10 percent is really not a lot.... If your down because of non sealing valves then there is little to be done by way of carb tuning to minimize the missing as your passing combustion gases either into the carb or into the exhaust when it should not be there. When was the last time the carbs were properly cleaned and tuned? Syncs do not count.
10% is enough to make it miss a lot and smell rich. I guess it's not rings by the results of the dry vs wet compression readings. Steve had the carbs in February. That's about 5K ago.
You could also be dealing with a non or poor firing cylinder due to an ignition problem by way of a fowled spark plug, rotten high voltage wire, bad plug boot. As commented by Steve 10 % is not a lot of loss if you have all your other ducks in a row.
You could also be dealing with a non or poor firing cylinder due to an ignition problem by way of a fowled spark plug, rotten high voltage wire, bad plug boot. As commented by Steve 10 % is not a lot of loss if you have all your other ducks in a row.
Sounds like you have stock ignition so the same coil drives cylinders 2 and 3..
You could interchange the ignition wiring for cylinders #2 and #3 and see if the problem moves or goes away.
Have you tried going to the hotter range plug (DR7EA) Not saying that will cure it but its one more idea to throw in the mix.
Just curious. How do you know for sure it's just the #3 cylinder that's missing?
Have you tried going to the hotter range plug (DR7EA) Not saying that will cure it but its one more idea to throw in the mix.