How are you adjusting the idle air needles? Usually it is because it is running too lean. Bring the engine up to normal temp and make sure the choke is
This may not apply to all scenarios.
Typically when leaving the low speed fuel metering while going into the high speed
Your serial number indicates that the model number is a BF100F. 1985
I think you will be pleased to know that the fuel pump is also used
Here is the Std LH 318 ignition firing order.
Distributors for both Standard LH and Rev RH engines turn in the same direction.
I would certainly try to return the carburetor. The part number that was listed was correct also.
It may have just been picked wrong