lewis16
ArboristSite Operative
I can't get it to rev high, not up to max rpm. Pulsing the trigger helps but it just dies and splutters and is very intermittent.
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Ms261 won't rev just dies!
- Thread starter lewis16
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Compressing drops even more as the saw gets hot. You may not have enough compression to run right.
lewis16
ArboristSite Operative
It does this from cold. Didn't have any problems when it was running in the wood then sounded like it was running out of fuel and then it's never been right since.
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But 120 ,nah! That cyl is wiped out why bother,unless he didnt pull it over enough times to get the highest reading. OP the compression is too low!Wouldn’t pass the P-V test. Pretty low comp but still should run.
Honed cylinder and 120 comp are red flags, along with “ stock squish “.
lewis16
ArboristSite Operative
New cylinder it is then.Honed cylinder and 120 comp are red flags, along with “ stock squish “.
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Don't be mislead by the compression junkies, that saw should run just fine with the compression you have. One thing to check is the nozzle check valve on the main jet (if it has one). These are never included in a carb kit and if they stick open it has a serious effect on acceleration from idle but won't effect how it runs at full throttle if it can get there.
Better than going nuts over this for weeks and it should run like new. OEM is the only way to go by the way China cylinders suck!
You can't ignore a 40-50 PSI compression loss!
He said it was straight gassed!
Nope you cant !
lewis16
ArboristSite Operative
When I replaced the bits in the carb it came with the two gaskets and diaphragms. I only did the carb kit after it developed the running issue.
Didn't come with any other bits. When I cleaned it I took the screws out and used carb cleaner, took the metering needle out and cleaned that, cleaned the gauze and tried to get it as nice as I could before rebuilding.
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Did you blow the carb out with high air pressure?
lewis16
ArboristSite Operative
Used Air but not at full blast. Mainly let the carb cleaner do its job.
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Compression junkie is a new one, I guess it’s not all that important.
It is, sarcasm duly noted.Compression junkie is a new one, I guess it’s not all that important.
Me, sarcastic, never!
crabby cooter
ArboristSite Operative
there's no gauze in the carb. remove gauze
lewis16
ArboristSite Operative
If you remove it to clean it, there’s a pretty good chance you’ll lose it, ask me how I know.
