Do I have an air leak?

[bsticks]

Hi All,
I finally found a decent MS250 on eBay. Was packaged fine, I received everything I was told I was going to get. Fired it up Saturday and it ran great. I was very happy with the power it had, cut great. After it got hot from cutting I put it down, locked the brake, and let it idle while i grabbed something about 10 feet from me. I heard it start to struggle to maintain the idle and by the time I got to it, it died.

It would fire right back up, couple quick pulls of the trigger and all the power was there. Good acceleration, etc. Same thing happened when I raised the saw on a slight angle to trim some branches off a tree.

Fresh gas and oil, all the basics done.

I think I have an air leak. Trying to find a friend with a tester but thought I would ask here if anyone else has had this happen to them.

Thanks,
bsticks

 

[smokinj]

I dont think you have an air leak soulds like you low carb setting needs turn up a bit if it has one...But with an air leak it will be very hard to start after its hot.

 

[bsticks]

It has the adjustments but my turning and tuning didn't seem like it was fixing the problem. I am now rethinking what is going on because I emptied out the gas and oil put the cap on and after a few minutes when I took the cap off it was like a ton of air came out of the gas + oil tank. I am thinking I have a vapor lock of some type.

 

[webie]

your saw has a one way air venton the fuel tank so as not to leak out fuel but let air in to displace fuel used by the running saw , that is normal if the saw was hot and you poured the gas out the rest vaporized and created pressure in your fuel tank . I will bet with Jay on this one it is either and issue of a carb setting or maybe even a need for a carb cleaning would be my first choice over an air leak .

 

[bsticks]

Ok, I will try that out and see how it goes. I just didn't want to lean it out.

 

[smokinj]

Ok, I will try that out and see how it goes. I just didn't want to lean it out.

not the h screw the L scew needs turn to the right start at a 1/32 turn at a time should take much...

 

[bsticks]

Got it, thanks. I will see what happens.

Thanks again for the tips and information.

Bsticks

 

[webie]

Ok, I will try that out and see how it goes. I just didn't want to lean it out.

not the h screw the L scew needs turn to the right start at a 1/32 turn at a time should take much...

I think the H on a 250 is fixed .

 

[smokinj]

Ok, I will try that out and see how it goes. I just didn't want to lean it out.

not the h screw the L scew needs turn to the right start at a 1/32 turn at a time should take much...

I think the H on a 250 is fixed .

I wasnt sure! Just seen the committ that he was affarid of leaning it out to much..Just wanted to let him know thats not the screw he will be dealing with.

 

[bsticks]

At last, working like a great machine! I did have to take it apart (luckily I have the service manual and illustrations) to clean it up, replaced two gaskets, and a small turn of the screwdriver and it idles great.

Thanks again for all the tips and thoughts.

bsticks