Rough running a low rpm / slight miss fire

[Bretty]

First things first, determine which cylinder(s) have the issue by putting a spitty finger on the exhaust manifolds as they warm up. See which cylinders warm up the slowest and report back.


You can then diagnose the issue by swapping plug caps (1/4 and 2/3) and repeat with the spark plugs to see what the misfire follows. If it still remains on same cylinder it's time to look at the carbs.