ORIGINAL: Jim Oliver
Helped a friend set up his new Rossi FISE .45 with 10mm carb this morning. APC 10x7, 10% Cool Power.
The only problem I see is that the high speed needle needs to be way out to be able to get the idle lean enough to have a nice clean transition.
Is there a "fix" for this? I have considered shortening the tip of the H.S. needle to allow/require it to be a turn or two further in for the correct H.S. mixture. Does this make sense?
Thanks,
Jim
Jim, sounds like you have the idle too lean and the high too rich. I was setting mine up the same way at first too. Remove the carb and with the barrel full open, adjust the low needle so it occupies 60% of the slot in the spray bar. Set the high speed to 3 turns and give it a try. Fire her up and set the high speed first then low. Keep the low as rich as you can to get a reliable idle. If it will not transition out of idle, it is because it is too lean on the low needle even though it will sound as if it is loading up. Would be interested in knowing what muffler you have as that can influence too.
If you just don't want to deal with that I have a 8mm carb that I would be more then willing to swap you for that 10mm. PM me if that interests you.