MS200t losing power

[stewmo]

Hi there

 

Yesterday my saw was working fine in the morning but as the day went on coming down a redwood it was running out of revs. Normally if it's too much for it, the chain stops but revs still there. Couple of times it nearly cut out all together. I really had to nurse it home and finish the tree.

Opened up air filter to see if choke still working ok and there was a fuel all over it and the carb.

Any thoughts? Hoping it might be obvious to someone what's up?!

Thanks

:-)

[Stubby]

Hi there

 

Yesterday my saw was working fine in the morning but as the day went on coming down a redwood it was running out of revs. Normally if it's too much for it, the chain stops but revs still there. Couple of times it nearly cut out all together. I really had to nurse it home and finish the tree.

Opened up air filter to see if choke still working ok and there was a fuel all over it and the carb.

Any thoughts? Hoping it might be obvious to someone what's up?!

Thanks

:-)

 

Split fuel line ?

[woodwizzard]

Fuel metering lever could be stuck open a little if crud is stuck behind the diaphragm causing flooding. Spark plug worked loose?

[stewmo]

 

Wondering if this the problem (or another entirely?!!). Plastic looks damaged but I have no idea what it is?!

[stewmo]

Not sure what the fuel metering lever is, but i did start by wondering about the choke because it was acting a bit like the choke was still on, so perhaps you could be right.

[swinny]

Thats the fuel tank breather bud! take it saw is 2004-2005?

 

Should be a little pipe with a very small bung / breather thing on the end.

 

Cheap fix if it seals fine to the tank

[spudulike]

It looks like the top handle is from the later saw and that hole in to top of the fuel tank is where the breather should plug in on older machines.

 

The lack of the breather will explain the fuel but not the lack of power. The lack of power could be anything but typcally I would suspect lack of fuel/carb issues or perhaps lack of compression.

 

The fuel escaping is a safety issue as it could ignite so get it sorted and worth checking the gauze internal filter in the carb is OK.

 

Does the saw idle and rev out to max revs OK?

[stewmo]

Thanks for help.

 

Yes saw idles and revs well. Just when in deeper cuts loses oomph.

 

Will get it looked at.

[stewmo]

Not sure what year it is. Can you tell from serial number?

[spudulike]

Thanks for help.

 

Yes saw idles and revs well. Just when in deeper cuts loses oomph.

 

Will get it looked at.

 

That sounds like it is getting enough fuel to idle and rev out but not enough in the cut.

 

I would check compression - expect 150psi + on a gunson gauge and check the fuel system out, it may be a simple carb issue and if compression is good, it almost definitely is!