Repair of Stihl MS250 Chainsaw PARTIAL ENGINE REBUILD - Part 4 of 4

Clutch reassembly and Start up after overhaul. Visit my channel for more repair videos; www.youtube.com...

[@JoeyFeliciano]

Don! You rock man! I took my MS180 apart today and rebuilt it thanks to you! My brother in law broke it about 2 years ago by putting straight gas in it and trying to run it with the chain brake on. I bought an MS170 as a replacement and kept the MS180 as a later project. Well..again thanks to you I gained the confidence to tear it apart and rebuilt it today. I am stoked. Thanks again...I'll pass the word around on FB for folks to subscribe to your channel!

[@GHULAMABBAS-bs4hy]

Dear donyboy 73 I am mostly watching your videos Your all STIHL CHAIN SAW videos very informative

[@philwalz8767]

Picked up a Stihl 023 from a garage sale for $10. Have been a bit scared myself of the inner workings of a chainsaw, but these rebuild videos are brilliant. Mine needed new piston and rings, and a reseal on the crankcase. Completely stripped if down, cleaned it, and it's great! Thanks for these great info sessions!

[@scramjet2000]

Absolute best instructions out there. Thank you!

[@johnowens6338]

Donyboy, thanks for the videos. You saved me after I trashed my new 250 with no lubrication in the fuel mix. What a douche!. I was so pissed and after finding out they were not going to cover it on the warranty, I mobilized and found a repair kit for $ 60 on Ebay, and then found YOU with the awsome videos which breathed new life that otherwise was a total disaster. Thanks for the education.

[@jcsrst]

THANK YOU so much for taking the time to make this video series! You saved my bacon!

[@mycoconut12]

Dony I saw on one of those arborist forum web sites that they just plug the hole in case below the muffler.so i did , oiler is working great. no oil leaking out of hole.

[@JuJo2010]

Great job on the 4 part series. I accually feel like I could do it myself after watching this.

[@apbmaxim]

Thanks for this great tutorial. It is very detailed, great for beginners such as myself who fear the inside of these saws. I usually take my chainsaw to be tuned and cleaned, but since seeing your video I was able to dive into the challenge and even went further with the winter clean before storage. It looks new again and runs like a top.

[@brianmurdock3095]

your video is a great repair video, I just finished my friend Sthil MS250 saw following your instructions, I am not a novice but the step by step instructions helped me turn a dead saw for 130 dollars in to a brand new running saw and saved my friend 200 bucks from buying a new one. Great tutorial, next will be my Husqvarna 51 saw I have had for 17 years.

[@donyboy73]

+Brian Murdock thanks, I have a video for the 55, same as 51

[@williamsmyth3246]

Hi Donny, thanks for a great video I have used it extensively to replace cylinder and piston on my Stihl 021 I found it very helpful and easy to follow, keep up the good work. William Co Armagh Northern Ireland

[@donyboy73]

thank you and greetings from Canada

[@dagwoodbumstead3216]

Dony, Your Stihl 250 rebuild videos are awesome. I am planning to rebuild an older 025 and your videos are a HUGE help! Thank you very much for making these!

[@donyboy73]

good buy Phil, that's the kind of deals I look for!

[@andrassy888]

These videos are excellent, thank you very much for your time and effort in making them.

[@donyboy73]

@Bigbones2001 the parts list may give u a good idea if u want one. it's a pdf file

[@70soundwave]

Excellent series of videos. I got a 028 in a box from my brother I aam going to see if I can put it together following your videos. Very informative. Thanks for taking the time to document.

[@johnclarke6647]

Stihl says to rotate the sprocket one full Revolution to ensure the worm gear arm drops into the notch in the sprocket, otherwise you will not be able to get the sprocket washer and E clip on the end of the crankshaft. I always put a little white lithium into the slot for the E clip to make its installation a little easier and future removal a lot easier. I also did not notice you putting some white lithium grease on the worm gear and sprocket bearing, but I could have missed it.

[@2cyclemix]

Ok. Re-checked the gap and adjusted it. Checked all the wires to make sure they were connected properly. I get a little stronger pulse but nowhere near making me want to let go of it. I even tried a new spark plug. The wiring seems to be correct - I get no pulse with the switch in the OFF position. Don't know what else to do except replace the coil. The saw was really dirty inside - like the operator cut too far and the chain went into the dirt. They might not have been careful using it.

[@donyboy73]

when the iler goes in u have to line up the hole in it to the hole inside, sometimes the oil line in the tank kinks and it stops the oil from flowing, u could try that first

[@2cyclemix]

Those are very nice saws for around the house. I used one after an ice storm. We had quite a few fallen limbs and the 250 handled them no problem.

[@donyboy73]

@ML424wr I would buy a stihl before echo

[@nathanmeitzler]

Great saws but the you have to take apart so much crap on my one craftsmen or in other words crapsmen you just have to remove all the mounting bolts and the clutch and that is pretty much it the whole engine comes out!!! My dad has the same saw!!! Works good!

[@Triangles77]

Awesome video, thanks for taking the time to go through the process in such great detail.

[@michaelpukmel9175]

Thanis, Dony, great video. Thanks for taking the time to make these videos and put them up.

[@btekwindsolar]

Thanks, I'm always fixing something new, and now with these videos I can fix my MS290 with the KIT I ordered... I think I collapsed the ring this time, and want to fix it myself.

[@roberthiggins42]

Great job thanks so much for the video.I've learned something every time I watch your videos...

[@70soundwave]

@donyboy73 I got it going thanks to your video. It runs like new I just have to get a bar and chain now. KZbin kicks Ass

[@donyboy73]

yes that's a perfect mix to break it in

[@donyboy73]

@th19940305 it was for a friend, but it would have been expensive

[@donyboy73]

@70soundwave the 028 is slightly different

[@donyboy73]

@Patriot36 thanks dude!

[@ToyotaMaintenance]

Great videos, nice channel, thanks.

[@donyboy73]

thanks man

[@donyboy73]

@freqeist the saws are clones or copy of the saw

[@johnclarke6647]

If the sprocket E clip does not snap into position when you install it - replace it. Otherwise it may come off when you are cutting and you will loose it and the sprocket washer. I also with a little white lithium grease on the slot on the end of the crank to help in removing the E clip inthe future.

[@mycoconut12]

Donyboy thanks for the videos , they were very helpful to me. I did a rebuild on an ms 250 that was given to me. the saw runs great. although i do have a problem with the oiler. oil seems to be bubbling out of the tank vent , the hole just below the muffler, very little oil coming out of the oil galley for bar. i removed the oiler and cleaned it. still not working properly. could the oiler be in backward. or just worn out any thoughts would be much appreciated. thanks again

[@deborahdinnan3203]

Excellent video,straight forward,common sense approach,great photography,made tearing down the saw easy.The rope trick is brilliant!!! THANK YOU!! Are you by chance Canadian? Canadian

[@43128lucky4]

what also works great for locking up the cylinder is an ohv spark plugs for honda engines, never failed me once and never had the ceramic tip crack

[@donyboy73]

@freqeist yes i would recommend this saw

[@kodibassInsideoutboards]

You said compression is nice and high for a 45 cc saw, What is a nice high compression for this size saw? or an average compression reading for a well running chainsaw in general? thanks

[@donyboy73]

you should not be able to hold it, check the coil gap again first

[@rshalish]

Thank you I feel very good taking care of sew like that or you watch your KZbin

[@donyboy73]

it's very expensive if you need a new cylinder, almost not worth it, hundreds of dollars but if you go aftermarket lower quality is more affordable

[@2cyclemix]

I have the same saw. Took it apart, cleaned it and reassembled it. It has gas, seems to have compression and it has spark but it won't start. I have a hunch the coil is weak. I unscrewed the plug and grounded it to me, so to speak, while I pulled the cord. I felt a little pulse of electricity but not enough to make me want to let go of the plug. Should it be strong enough for me to get a really good jolt?

[@donyboy73]

you're welcome

[@Patriot36]

Outstanding dude! Thanks you!

[@craftsmank]

wonder if you can help - got a ms230 and for the life of us we canw work out how to re instal the return mechanism on the break. Everything else is in place - the only part we cant figure out is a small wire piece with a loop on one end and a l on the other? many thanks B

[@donyboy73]

@roboman79 very rare

[@scuffieduffie]

She runs beautufull

[@sheerspt]

The STIHL is a excelent brand :)

[@donyboy73]

@TheWhupper if ever one comes in I'll make a video

[@MrSodakiller]

Donyboy, do you have any video on stihl chain oil'er ? i dont think it's getting oil to the chain though it has oil in it. Thanks

[@donyboy73]

@kodibass between 110-150 psi

[@donyboy73]

to wear the bar evenly

[@philwalz8767]

By the way, I used after-market parts and it only cost me $60 to rebuild the saw. Great little saw for $70 total!

[@genghisman39]

How similar is this rebuild to an older Homelite Super XL AO (pre 81 points ignition)? I have one that has just enough compression to start with a small shot of carb cleaner and at full throttle, but won't idle.

[@dpeterbannister]

thanks for the excellent videos on this rebuild. I have an MS 250 which starts up ok and then cuts out a soon as the throtle is opened. Cant work out why! any ideas?

[@donyboy73]

then try a new coil

[@poochie49]

Love your videos. I have an MS250. It is VERY difficult to pull the starter cord. Almost seems like the brake is stuck in the on position but when I remove the sparkplug it pulls smoothly with no hint of braking. What could be the problem?

[@donyboy73]

thanks for watching

[@GHULAMABBAS-bs4hy]

I am a technician of agricultural land scaping machinery

[@foreverwood1963]

Excellent job i'm glad you showed that little notch in the clutch I was checking a saw out and when i went ti put it back on , it kept shutting off. As if the load was too much I took it back apart and noticed that oiler was not in the notch and it was binding the clutch a little. Dony tell me I've not had much trouble over the years adjusting the high and low needle, but please let me know after you have adjusted them how do you adjust your idle screw?

[@harryohschmidt1247]

+foreverwood1963 When you have your high and low speed set at what you feel is fine... turn in your idle screw until chain rotates quickly.... then back off till it doesn't rotate. Saw should idle steady and no chain rotation.

[@foreverwood1963]

Harry Oh Schmidt Thanks

[@kirksvillemale]

was just wondering how many hours it took you to rebuild this saw.

[@foreverwood1963]

Hey Dony I have the same saw that the brakes don't work on. When I rev the engine with the break on the chain turns can u help?

[@mycoconut12]

hi Donny boy i have the exact same saw , i rebuilt it several years ago with the aid of your videos , thanks ! but now its developed a new problem that i cant figure out. it starts right up and runs great for about eight seconds then dies like the kill switch is on , i checked to make sure its not the coil. has good spark .could it be the impulse line or the fuel tank vent.what else is there to check

[@firstr-podjourney4787]

Unbelievable series. Nice job. My gas hole is chipped, and the cap won't stay on. It leaks all over the place, and the saw is unusable because of it. Have any clever ideas? Or will I have to do a complete take down and replace the plastic engine block ?

[@donyboy73]

unfortunately you'll have to replace the tank

[@firstr-podjourney4787]

Workaround: Got a gasket, cut the nozzle off a 12 oz soda bottle, and Gorilla glued it in place. No leaks or bleeding yet.....

[@philwalz8767]

When running-in a new piston & rings, should I run a richer fuel mixture for the first few tanks? I run a 32:1 fuel mix in my Husky 394xp. Is this mix ok for the Stihl?

[@Naptic]

so do you use rim sockets?

[@JoeyFeliciano]

Nice video Donyboy73! I watched the 4 videos for I have a MS 180C that needs to be rebuilt. I have never done this before, so I really appreciate your work. Is the MS250 similar to the MS 180C?

[@donyboy73]

it will be in the sense that they both have an engine block

[@JoeyFeliciano]

OK...thanks!

[@Pintony1]

yup! no grease for the clutch bearing!!!!

[@michaelpukmel9175]

Any chance you have a video that shows how to clean out the oil pump? I have a 250 and this season it is not oiling nearly enough. I took off the bar, and cleaned everything, emptied out the oil case, replaced it, still not enough oil coming out. I think there might be some junk down in the pump, don't know how to get at it. Thanks.

[@VIheavyequipment]

have you had many problems with the plastic wearing out or braking where the bar studs go on stihl and husky products?

[@MrGillespieable]

dony...your channel is the bomb! ever any problems with the bar oilers on the stihl 250 / 251? they really are skimpy with the amount of oil they put out. Im trying to thin the oil but not a hudge difference. wish they would put out more bar oil. bar gets pretty hot sometimes. love your channel! thank you for being a great filmmaker.

[@harryohschmidt1247]

+Steven Gillespie Use bar oil from Stihl dealer. Get a "pick set" from Princess Auto to clean grooves and oil holes in bar. Clean sawdust away from lube holes with brushes and picks when cover is off. Also see if your bar has the lube hole for the sprocket gear for chain. If so Stihl sells grease in a blue tube for this. Any questions go to a Stihl dealer with saw. Also oil screw on bottom of chainsaw does not move much.. so try full open...Manual says oil should fly off bar when you hold to a stump for example. Got a Manual for saw? If not download one PDF. Few more tips... Put a dab of grease on the bearing when you sharpen chain. The clutch bearing. Always flip bar after sharping chain. Do not have chain to tight. If you use your saw a real lot... as a woodcutter.. run with high test gas. Saw will run cooler! My stihl is a Farm Boss 290.

[@jhonnytinococruz4338]

nice video

[@donyboy73]

Jhonny Tinoco Cruz thanks

[@donyboy73]

@alcobaseta at the moment i don't

[@a34645cahr]

nice

[@poochie49]

Great videos. My MS250 oil reservoir leaks. I didn't see where you show how to access it or remove it. Does it have to be stripped down almost like an engine rebuild?

[@donyboy73]

it's part of the plastic engine block so there's quite a few things to remove

[@asdfghjkl9312]

Were do u get all the parts like pistons and stuff. Cus my blower just blew a rod and broke the piston. Thanks

[@joshGNR2]

hey man great vid!!! i have a ms250 but having trouble with the carb adjustment screws as they have been messed with. please could you describe the factory position for the 3 screws? Many thanks, josh.

[@donyboy73]

start at 1 1/2 out for L AND H, then adjust the idle screw

[@joshGNR2]

donyboy73 Thanks dony!! She fired! definitely gunna subscribe, thanks

[@steveberryhill5252]

have a husqvarna 455 starts an runs when i throttle it up it does when i release and start to throttle it up again it boggs down fuel mixture is right carb is adjusted right and clean your thoughts on problem . could it be check valve inside of carb thank you

[@GHULAMABBAS-bs4hy]

My own service centre in MUSCAT Oman 🇴🇲

[@Pintony1]

motor mount bolts???

[@2cyclemix]

It's like rotating the tires on your car.

[@donyboy73]

thanks for watching, please tell your friends

[@007more7]

How does the crank get oiled

[@digitalseabee2012]

Great Video's! I subscribed for sure :)

[@donyboy73]

@70soundwave awesome job dude, tell ur friends about my channel!

[@GabrielHernandez-rw2oj]

How do u know the right timing of the fly wheel piston and valves

[@donyboy73]

no valves, it's a 2 cycle engine

[@bobbrua8758]

how much is saw?

[@craftsmank]

@alcobaseta Many thanks, problem solved. B

[@paulthegame86]

nicee

[@donyboy73]

@Bigbones2001 i have a parts list i could email u. pm me ur email

[@johnclarke6647]

If the sprocket E clip does not snap into position when you install it - replace it. Otherwise it may come off when you are cutting and you will loose it and the sprocket washer. I also with a little white lithium grease on the slot on the end of the crank to help in removing the E clip inthe future.