I have an old 440 that I just made a 440/460 hybrid. I put a brand new carb on it when I did the swap because when it was just a 440 I couldn't ever get the carb adjusted correctly, or so I thought. The 440 piston was also absolutely shot so I never really thought about the issue being anything other than that or the carb. But now with a brand new jug, piston, and carb it still does it. Is it my clutch springs? Or does anyone have any idea? It's holding compression at 160, starts right up, but it just runs and runs and runs. Even when the engine audibly sounds like a decent idle the chain will not stop. It's really starting to piss me off so any help would be appreciated haha.
Cannot get chain to stop spinning even after carb adjustment.
- Thread starter nraws
- Start date
Help Support Arborist Forum:
Clutch springs and sprocket are probably shot.
Yup, likely. Prob 1 spring broke take a look.
Or you may have chips/dust packed in the spider, shoe return areas. Just a thought.
Or the drum bearing needs cleaned/greased
I had that happen from water rusting it.
freeasaburt
ArboristSite Operative
Had the same thing with my 044; as advised here, I replaced the clutch springs, the old ones got too weak apparently (and cleaned the clutch in the ultrasonic, too). That completely fixed the problem. Local Stihl dealer was sort of surprised to have someone just ordering the springs, in stead of replacing the whole clutch assembly. That's how I prefer to do things, though 
.
.
OK, I take it you can turn the idle down to a stall?
Similar threads
