Re: Help Please on Lightwin Carb issue?

[Don]

OK, heard it that time on start up. I’m guessing one cylinder is kinda lean due to an internal problem and it takes it little running to get the weak cylinder totally online….That video was with the replacement carb too, correct? Again, you could try the suspect carb on a good running engine to rule out carb problems. The only simple internal problem I can think of is if the intake gaskets are reversed or perhaps one of the reeds isn’t closing up very well, does it look like the intake has been off before? Be careful if you decide to remove the intake, those gaskets can be hard to find. The only thing that might be worth trying is to retard throttle pick up some which will allow the throttle plate to be closed at a more advanced ignition position which will let the engine run a little richer.
Unfortunately, my two cents is on an internal problem/crankcase leak/poor primary compression causing the loping and lack of idle.
What did the pistons/cylinders/rings look like when you had the head/exhaust cover off?