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
Hi Jim
I had the same problem.....there are 3 fixes I know of....install a Perry pump...this works really great.....or get the smaller carb from SG....or a Perry carb.
I've done it all 3 ways but of course the engine will breath better with the Perry and big carb.
The big carb just does not have enough suction to be able to be adjusted properly....this is nothing new and I had this very problem in the 80's with several Rossi engines.
All were fixed using all 3 above methods.
I reccommend the smaller carb.
Webra had the same problem...they would ship 60 Speed RE engines with a huge slide carb i/d and no pump. A slick fix for that was to get a Webra 40 size slide carb and stand back...they really screamed....and idled....and transitioned.