Stihl MS250: end of the road?

[cedarhollow]

I did not realize your in Australia and the price difference. I saw a lightly used MS250 at a pawn shop in Florida USA last month for $125 US, I guess things are much different on the other side of the planet. Good luck with it. Others on this site know more about these saws than I ever will.

 

[HarleyT]

I was just joking, but their prices are pretty damn high over there.

 

[happysaws]

I have 9 saws... only 1 of them is UNDER 10 years old.

I have 16, my NEWEST was made in 1979...[emoji16]

 

[bitsumishi]

take some pics.

Found a 250 teardown vid on youtube.
The fuel pipe looks ok.
Should I just take the carby off and give it a good soaking, if so in what?

 

[drf255]

The Chinese clone carbs work just fine on those.

Can get right on amazon or eBay for under $15.

I wouldn't even try to rebuild that carb.

 

[Khntr85]

Many that funny, I have never seen a yellow limiter before....I have been in the primer bulb 250 and regulars....always black here...

 

[Khntr85]

As far as carbs go I would try to clean it once, if it don't work out a cheap eBay one in!!!

 

[mga]

new spark plug I had put in was faulty and he replaced it and checked the saw: spent 45 minutes on it, total bill $130.

$130 to put in a new spark plug and spend 45 minutes looking at it???? never mind a new saw, find a new service guy.

friend of mine has an ms250 and that thing just wont quit.

 

[HarleyT]

As far as carbs go I would try to clean it once, if it don't work out a cheap eBay one in!!!

A new one from the Stihl dealer is @ $21

 

[bitsumishi]

Many that funny, I have never seen a yellow limiter before....I have been in the primer bulb 250 and regulars....always black here...

Hmm, yes I have been trying to find a picture of the same carb, with the yellow cover and cant find one anywhere across the globe. The black one is a different shape so I am wondering if the rubber thing will fit. Plus there seems to have been at least three different types of Zama carb used on the 250, possibly more. There was Ergo start, Easy start and standard. Plus the fuel in the US and Aus is different which makes me wonder if the carbs they used ( and therefore the Ebay offerings), would be exactly the same here.
I may have to go genuine. The part number on the carb I have, turns up nothing on the net.

 

[Khntr85]

When you blow it off take a pic of the top of the carb..

Also a lot of cards will work on eBay, but some require trimming of the rubber grommet....you would be better off doing as Harley said, since this is the first one you are working on...

Let me add here I do believe you should let the dealer who worked in the saw know, but I understand your condition....

I do believe that it's a good possibility(especially if you have used the saw a lot over 10-years), that the seals are bad, exspecially the PTO side....now none of this is like open heart surgery, I just want you to realize that there is a possibility that it could be more than the carb...

 

[bitsumishi]

When you blow it off take a pic of the top of the carb..
........I do believe that it's a good possibility(especially if you have used the saw a lot over 10-years), that the seals are bad, exspecially the PTO side....now none of this is like open heart surgery, I just want you to realize that there is a possibility that it could be more than the carb...

Yeah I know it could be more than the carb but I will replace that before stripping it down further in case that is all it is. If necessary I will strip down the engine and replace parts where necessary. I like this saw and as has already been mentioned, buying a comparable saw here will cost $1000 to $1500 depending on the brand.

 

[HarleyT]

The yellow limiter cap is something that you will pop off anyway, and likely throw away. It is probably specific to your continent anyway. Blow off that sawdust and pull that carb off.

We'll start on this thing now.

 

[HarleyT]

I have a new one sitting here just like it.

 

[HarleyT]

Pull off the metering cover.

 

[HarleyT]

And the fuel pump side cover.

 

[HarleyT]

Now, under the lever/spring/needle thingy is a passage.

 

[HarleyT]

That passage leads to a hole under the screen thingy on the other side,
so remove the lever/spring/needle.

 

[HarleyT]

After the needle is removed, hold the carb body up to a light and look through the hole to the screen on the other side, and see if the passage is choked up with gunk.

With the carb off, go back and closely inspect the fuel line again, look for cracks @ where it goes into the tank, and for excessive mooshiness on the part that sits in the gas, ans rips/tears there as well.

 

[Khntr85]

So as Harley says first and clean the carb, I have stripped them down, cleaned all the sawdust out and sometimes that is enough to get the saw going....especially since they are so easy to get in and out, it's worth a try!!!!

Just be careful not to bend, or rip the diaphragms, they are fragile...also be careful with those little screens they are easy to lose, don't ask me how I figured these things out LOL....

You will get her running, @HarleyT has diagrams of damn near everything...just take your time and take pictures as you go....nothing worse than getting saw all back together then seeing a part that you forgot!!!