Chainsaw Repair

Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Stihl => Topic started by: countryhog on January 20, 2014, 01:33:54 pm

Title: ms250 questions
Post by: countryhog on January 20, 2014, 01:33:54 pm
got one from the metal recycling yard. has fire and compression. needs a new sprocket and is missing the sprocket cover, bar, and chain.
1. should i switch it over to 3/8?
2. not sure if it was the self adjusting chain tension type or not. what should i look for? only has the front bar stud. the rear one appears like it may have been broken off or, if i'm reading the repair manual correctly, it could possibly be part of a self adjusting setup.  if it is self adjusting other than the sprocket cover what would it take to convert to a manual adjustor?
3. are the studs simply a screw-in type? i assume a left hand thread.

also, since i really haven't gotten to play with this thing yet i'm not ready to start buying parts yet but if i can get it to fire off and run i will be looking for the aforementioned parts.
just doing my up front work right now.
thanks for any help.
jerry
Title: Re: ms250 questions
Post by: 660magnum on January 20, 2014, 02:47:43 pm
.325 is the best setup on these. I use the yellow label Stihl RS chain .063 gauge. I sometimes use the Stihl yellow label semi chisel chain too.

Your saw a "C" version and IIRC, they cannot be made into a regular one.

Title: Re: ms250 questions
Post by: rayvil01 on January 20, 2014, 06:57:03 pm
The clutch-side half of the crank case is different for the "C" version.  There isn't room under the bar stud in that milled slot for the chain tensioner mechanism that the standard saw takes. 

I wasted a bunch of time trying it on a 270C.  If you look REALLY closely at the IPL you'll see it.   It's not obvious, though.  That's my excuse and I'm sticking with it.   ::)

Actually, the hand adjuster is not that bad.  I revolted at the thought of it.  But, it is actually pretty easy to use.  Trick is that it's easy to get lazy and not rotate the bar because the big gear has to be removed.  It's just a hand screw.  When I bought the saw the previous guy had never rotated the bar.  That  bar was hammered on the bottom. 
Title: Re: ms250 questions
Post by: Philbert on January 20, 2014, 10:07:10 pm
The standard chain adjust will have the adjustment screw in the case. The tooless chain adjustment features are mostly mounted in the clutch cover and on the bar.

I have a bunch of NOS OEM clutch covers and .325 spur sprockets for those saws, along with some reconditioned chains.

Philbert
Title: Re: ms250 questions
Post by: 660magnum on January 20, 2014, 10:09:44 pm
There's no reason the "C" setup would not last a experienced mechanical person a long time. They just don't work well for idiots.

I would never go out and buy a new one but if I got roped into one in a trade deal, there's no reason I wouldn't use it.
Title: Re: ms250 questions
Post by: Fish on January 21, 2014, 08:52:32 am
If you switch it over to 3/8, it will have to be 3/8 lo/pro.
Title: Re: ms250 questions
Post by: 660magnum on January 21, 2014, 11:43:11 am
If you go with 3/8 low profile chain, the Stihl PS chain is the best
Title: Re: ms250 questions
Post by: countryhog on January 21, 2014, 04:47:13 pm
thanks guys. now all i gotta do is see if it'll run. and run well. we'll see
Title: Re: ms250 questions
Post by: Fish on January 22, 2014, 10:29:46 am
Have you tried the Oregon 91vxl  They made a longer cutter to mimic the Carlton's longer cutter?
Title: Re: ms250 questions
Post by: countryhog on January 22, 2014, 01:20:39 pm
not yet. may try that once i determine if its worth the effort.
Title: Re: ms250 questions
Post by: H 2 H on January 22, 2014, 01:48:58 pm
"There's no reason the "C" setup would not last a experienced mechanical person a long time. They just don't work well for idiots."

I had to clean my screen after reading this but it's all so true  ;)

This is how I have gotten so many MS 250 because people don't know how to mix there fuel

IMO - .325 is perfect for this saw I've used both size chain on this saw; I've also used skip chain on it while bucking and it's sweet but for limbing it's terrible 

(http://i59.photobucket.com/albums/g317/H2H_PHOTOS/MS%20250/DSC_9345.jpg)