I do not use “Chinese farmertec or hutzl” parts on any of my saws or builds - carbs , clutches , jugs/slugs etc it’s OEM or go home imho ... “The bitterness of poor quality remains long after the sweetness of low prices are forgotten”
Could very well be an air leak ... you say racing engine with high and low set to stock settings 3/4H ; 1/4L and that you backed out the L To 1-11/4 turns and the idle adj screw until it almost fell out ? Id throw a tach on it to see where it’s idling (or racing)at the stock settings first
The STIHL manual states 3/4 on H and 1/4 on L from a lightly-seated position ... If this is a stock saw it should idle and spool up nicely using these settings ... a screwdriver to adjust to suit the mixture richer or leaner will get it close (just worry about the L and LA for now until you get...
Well ‘cording to @Nutball STIHLS have no torque so feel free to send to Frankie here in the city with no pity ... here’s the 066s younger sibling ... hotwoods ported 064 thru some cherry ... seems like plenty of torque to my eyes 😂
First Check spark , IF good then put some mix in a squirt /spray bottle and squirt some mix into carb throat ( a little dab will do ) with the master control lever set to cold start ... See if it will “pop” and get back to us
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