Amin_1992
ArboristSite Operative
Hey guys, I am totally stuck at this point and decided to drop my Stihl MS250 at the local shop to have them give it a shot. Wrote them a detailed note and they are 2 weeks out, but figured I'd post here in the meantime to get you all's opinion.
This issue has me baffled and annoyed to no end. The saw runs beautifully despite being nearly 2 decades old, except for this one issue that has happened for a while now.
When cutting into a log, at full throttle, and then releasing the throttle with the bar still in the log, the saw will stall out. When it doesn't stall out, the idle drops very low, as if it's about to stall. After about 5-10 seconds, if it doesn't stall, idle RPMS climb back up to where I have them set.
This only happens when the bar is still in the log, touching wood against the chain. Cannot replicate it by revving in the air and letting off the throttle.
Starts perfectly, will sit there an idle all day long. Usually starts on just 1 pull. But when it stalls out like this, restarting it takes like 6-8+ pulls.
I've tried everything. The obvious has already been done - spark plug, air filter, tuning the carb screws - with no luck. I even replaced the clutch, as a user on here way back thought maybe it was the clutch sticking. Their theory made sense - chain touching log, so if clutch is sticking then the stopped chain will cause the engine to stop turning too. However, new clutch that is totally clean doesn't help. I also inspected all the fuel lines and as far as I can tell, no cracks or leaks. They all seem pliable and when pressing the purge bulb I don't see any fuel or bubbles or anything leaking out.
I actually had it at the shop a few months ago for an unrelated issue, they tore apart and cleaned the carb and changed the diaphragm, and it actually ran quite well for a few weeks before I put it away. Month or so later, it's back to this bull.
Any ideas? I'm about at my wits end and just going to sell the saw and buy a new MS261 or something. Let me know what yall think, thanks
I actually got a video of it stalling out. Check it out: cutting into log at full throttle, release throttle part way through, saw dies.
This issue has me baffled and annoyed to no end. The saw runs beautifully despite being nearly 2 decades old, except for this one issue that has happened for a while now.
When cutting into a log, at full throttle, and then releasing the throttle with the bar still in the log, the saw will stall out. When it doesn't stall out, the idle drops very low, as if it's about to stall. After about 5-10 seconds, if it doesn't stall, idle RPMS climb back up to where I have them set.
This only happens when the bar is still in the log, touching wood against the chain. Cannot replicate it by revving in the air and letting off the throttle.
Starts perfectly, will sit there an idle all day long. Usually starts on just 1 pull. But when it stalls out like this, restarting it takes like 6-8+ pulls.
I've tried everything. The obvious has already been done - spark plug, air filter, tuning the carb screws - with no luck. I even replaced the clutch, as a user on here way back thought maybe it was the clutch sticking. Their theory made sense - chain touching log, so if clutch is sticking then the stopped chain will cause the engine to stop turning too. However, new clutch that is totally clean doesn't help. I also inspected all the fuel lines and as far as I can tell, no cracks or leaks. They all seem pliable and when pressing the purge bulb I don't see any fuel or bubbles or anything leaking out.
I actually had it at the shop a few months ago for an unrelated issue, they tore apart and cleaned the carb and changed the diaphragm, and it actually ran quite well for a few weeks before I put it away. Month or so later, it's back to this bull.
Any ideas? I'm about at my wits end and just going to sell the saw and buy a new MS261 or something. Let me know what yall think, thanks
I actually got a video of it stalling out. Check it out: cutting into log at full throttle, release throttle part way through, saw dies.