A couple of weeks ago, I was driving Baby Blue when the motor began running rough inexplicably. I figured something got out of whack with the carbs or it was from the change in temperature. I've been tweaking the carbs, but the motor still runs very rough in the 1000 - 2000 rpm, starts to find itself again between 2000 - 2500, and then is as smooth as a baby's butt from 2500 to as far as I'm willing to push the motor (usually 4500 max). I also find myself losing power more quickly under load, like hill climbs, and once the revs fall into the 2000 rpm range, Baby Blue turns into "The Engine that Could", and even sounds like the engine is saying "I think I can...I think I can..."
I thought some of the roughness was from mixing the carbs overly lean, but richening the mixture hasn't had any affect. Richening the mixture gave me slightly better acceleration and bit better hill climb power, but not a significant difference and no change to the low end rough running. It almost feels like a cylinder is dropping at low rpms.
I'm thinking something else may be in play besides the carbs? Maybe a bad plug or plug wire, or perhaps the engine's timing is off? Any thoughts?
I thought some of the roughness was from mixing the carbs overly lean, but richening the mixture hasn't had any affect. Richening the mixture gave me slightly better acceleration and bit better hill climb power, but not a significant difference and no change to the low end rough running. It almost feels like a cylinder is dropping at low rpms.
I'm thinking something else may be in play besides the carbs? Maybe a bad plug or plug wire, or perhaps the engine's timing is off? Any thoughts?