3120xp lost power in cut, tough to start ? Troubleshoot.

[andy]

The piston looks good enough to continue using it, thanks for posting the pics.

I think I have a carb that is slobbering too much fuel in. Over rich condition.... needs a carb overhaul.
It's unusually wet with mix in there.

 

[pioneerguy600]

It might just be the carb settings going out of whack but I would want a vac and pressure test done just to be certain. I have seen two 3120`s smoked by vac leaks.

 

[pioneerguy600]

I think I have a carb that is slobbering too much fuel in. Over rich condition.... needs a carb overhaul.
It's unusually wet with mix in there.

I would rather see it wet than dry but too wet is a poor running saw.

 

[Brent Nowell]

Yes I agree nothing wrong with that Piston. Check your carb mounting bolts, try and start it again.
If it’s still running wonky start spraying carb cleaner with a straw on a couple areas, start with the cover off and air filter on, but where the boot connects to the cylinder. Looks for changes in idle or stalling when you do this, if it does then you have found an air leak.

Another couple places, flywheel side seal, and the clutch side seal right on the shaft. Also around the cylinder mating area.

 

[Jacob J.]

I think I have a carb that is slobbering too much fuel in. Over rich condition.... needs a carb overhaul.
It's unusually wet with mix in there.

If that much fuel is pouring in, then yes, you likely just need new diaphragms and an inlet needle. A pooched metering diaphragm will keep the inlet needle open
and continually flood the saw. A metering diaphragm hardened from exposure to ethanol will not flow enough fuel. The interior of your engine looks good. Like Jerry said -
getting too much fuel isn't good but a lot better than not getting enough.

 

[andy]

Give y'all an update.
Found a great mechanic just a few miles from home.
He charged me an hour to troubleshoot, break down, and re-build the carb + new fuel line and filter and, a screw backing spring.... $78 with tax ....No complaints.
The spring for Throttle position screw was mush for whatever reason.
It may have been the biggest issue......heavier spring replacement and I'm back in biz.

Thanks again for all the suggestions and comments.

Todays work...Soon to be new wrap around bench for the Bonfire pit. Timelapse below. Angry bit of wood but what a beauty!

 

[Deleted member 149229]

Give y'all an update.
Found a great mechanic just a few miles from home.
He charged me an hour to troubleshoot, break down, and re-build the carb + new fuel line and filter and, a screw backing spring.... $78 with tax ....No complaints.
The spring for Throttle position screw was mush for whatever reason.
It may have been the biggest issue......I'm back in biz.

Thanks again for all the suggestions and comments.

Todays work...Soon to be new wrap around bench for the Bonfire pit. Timelapse below. Angry bit of wood but what a beauty!

Good thinking on that bench.

 

[rarefish383]

Give y'all an update.
Found a great mechanic just a few miles from home.
He charged me an hour to troubleshoot, break down, and re-build the carb + new fuel line and filter and, a screw backing spring.... $78 with tax ....No complaints.
The spring for Throttle position screw was mush for whatever reason.
It may have been the biggest issue......heavier spring replacement and I'm back in biz.

Thanks again for all the suggestions and comments.

Todays work...Soon to be new wrap around bench for the Bonfire pit. Timelapse below. Angry bit of wood but what a beauty!

Heck, my old Homelite Super 1050 mills faster than that!

 

[andy]

Heck, my old Homelite Super 1050 mills faster than that!

It will be even slower next time with an 6 or 7 pin.
(I only had 8pin handy not ideal for this 62" Bar I reckon )

 

[rarefish383]

I was joking because you were in time lapse. My 1050 makes a nice milling saw, and about even with my 660, up to about 24" Oak. But, I'm not getting in a race with a 3120.