gary55
Well-Known Member
While you got the carb off you might wana pop the bowl off and clean up the float needle and housing. Just guessing, but it does sound like a 4 stroking issue. If it was running good and this all just suddenly started happening It is doubtful to be a jet issue unless the jet has loosened. If the float needle isn't seating you could be getting to much raw fuel into the venturi causing the 4 stroking. I also noticed you said Mt. Lemmon. The stock jet should be pretty close for Tucson elevation with a NT needing only tuning by needle adjustment. The chart says a # 68 is called for at your elev. and average temp., But I use a # 68 here in Prescott with the clip 1 notch down from the top with NT carbs on moderately modified engines.
