Resurrecting this thread as hopefully theres some still subscribed that can help me out, am looking for advise on how to reset the Hutzl carb to factory settings... But first the back story
So I bought a MS660 kit, showed up mostly intact and for the few bolts/nuts not included Hutzl sent me the replacements free of charge. Installed OEM wrist pin, piston bearing and decomp. Finally got it together this w/e and much to my amazement/excitement it fired right up after 4-5 pulls, let it idle and blipped the throttled a bit and let it do a couple of heat cycles before I put it to bed last night.
Got up this morning and it started right up again and felt strong, warmed er up and then thought Id play with the carb, low speed screw seemed about right but I did move it a bit, then went to do the fast screw with the tach and it was pulling just above 10k, went a bit leaner and then it died on me and refused to restart. Since I never did a leak test thought Id use as an opportunity to pressurise and found that the base gasket had let go (or was never sealed in the first place). I actually bought another (hutzl) gasket set and thats the one I used originally which was metal, so this time used the paper gasket that came with the kit. Buttoned everything back up and case now holds 10psi. Only thing is damn thing still wont fire, and it seems pig rich - only kick I get every 15 pulls is a flame burp out of the exhaust and plug looks very wet.
SO, am now wondering if I pushed the carb into no-mans land settings, but not sure how to 'start again' on these carbs. Or something else has gone bad... Spent many hrs this avo trying to make it go and wondering whether I should replace the carb with the Walbro one I see referenced a bit, but part of me also feels like this might be throwing good money after bad and I should find a 2nd hand OEM saw and use this thing for parts... Probably just the frustration talking, was having lotsa fun until it damn-well died