Part 1 MS290 to MS390 Engine Conversion Swap 46mm to 49mm 56cc to 64.1cc
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- Опубликовано: 25 авг 2024
- This MS290 chain saw was donated to Nature's Cadence Farm by a very good friend of the family. The friend asked if I could show how to replace the motor in a video, so I did. I decided if I was going through all of this I was going to " upgrade " I went from a 46mm bore to a 49mm bore (MS390). This is a multi part series that is broken into three sections Part 1: Disassembly , Part 2: Assembly , Part 3: Final assembly and start up.
This process is very similar to MS290 MS310 MS390 029 031 039
The parts in the engine kit were: jug cylinder piston rings wrist pin snap ring connecting rod crank bearing bearings seal seals crank case bolts. Basically a complete engine.
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This guy knows how to make a video...no nonsense, detailed and a pleasure to watch. Just great info....give us more!
Mark Weaver thank you for the very kind comment! Keep an eye on the channel for more chainsaw videos. ~Mr. C.
Thanks man. You're a good teacher~ I look forward to your next videos on this saw.
michael haddan thank you for the nice comment. I have a short test video coming soon. Stay tuned! ~Mr. C.
Thanks for making this video very helpful and educational 👍🏽👍🏽
R G you are very welcome. I had a blast pulling the saw down and getting it going again. I have used this saw almost exclusively for the past year and I love it! At first it was a little weak but the more she runs the stronger she feels. I did do a muffler mod and carburetor adjustment after the fact and that really helped. Check out the playlist below, it has the conversion saw running against some of the other saws i have. ~Mr. C.
ruclips.net/p/PL9e-N4NEgHNugVR3FhAPMhAS23fPoHIW2
Hello again, I just gotta tell you again how I enjoy your how to videos, you are a regular guy kinda teacher, you make things understandable for guys like me :) none of that high tech talk!! Your video on the Cub Cadet voltage regulatory? helped me tremendously and I truly appreciate all your hard work and time you put into these videos. Keep em coming cause there's always something around my house that needs fixin' and I'd rather do it myself then pay someone else to do it. Thanks again and you and your family have a blessed Christmas!! :)
-Rick
Elmhurst, IL
Thanks for publishing these videos. I'm uploading a video of my MS290 to MS390 conversion and I referenced your video series for my trouble spots. I'll throw in a link to your channel in my posted video. Thanks AGAIN!
Thrifty Garage I can't wait to see them. Thanks for the links and the references. You just reminded me, I need to make a short video of it all tuned up and running strong. Maybe I will try a head to head with my MS390 and MS290... ~Mr. C.
@@NaturesCadenceFarmsounds great! I have the notification bell clicked so I'll be sure to check out that video when you post it!
Mine on table in parts in garage... been to busy start putting it back together.
@Lonnie Pruitt that's cool. I understand. Just checking in. I ran mine most of the weekend clearing trails. Still running great! ~Mr. C.
hello, a big thank you for this video, I had changed stihl engines but the shape of this one is different .... without this video I was lost .... I did not know that the base of the engine had to be removed, I tried with a tool to tighten the segments but impossible;......Thank you from Belgium. Ben Fappani
@Kennel Von Schwarz & Feuer we are so glad you found the video useful. We are happy to help. This style engine is called a clam shell. As you see the crankcase pan on the bottom of the engine is how the crank is removed from the cylinder. The metal body of the pro level saws is the crankcase which holds the crank and the cylinder is removable. So awesome to hear from someone from Belgium! Happy sawing! ~Mr. C.
Hey man, I know it's been a minute, but just wanted to say I like your video. Showing which sockets, torx etc. when explaining the teartown was pretty nice. Keep up the good work.
How's she holding up? Won't be buying Chinesium anyways but curious about that engine
Stretch MFE thank you for the kind comment. She is doing well, I used her to do some trail clearing over the winter. Worked good. Have not done much cutting this summer but that should change soon. ~Mr. C.
Hi! I like to mention I really like this video. I'm getting ready to rebuild my ms290. I'm gonna do exactly what you did. Question... how's the aftermarket part doing? Also how many times you use it? Thank you for everything.
John Funk the engine is running great. I have not been cutting too much lately but the handful of times I did use it everything has been perfect. If I had to put a number of hours in use I would say over 10 but less than 20. Hope this helps. ~ Mr. C.
@@NaturesCadenceFarm Thank You!
You really do a great job with the videos, but you should never use an impact on the clutch for removal or assembly. It can shear your flywheel key in your flywheel since it is only aluminum. A new flywheel from Stihl is around $100. Just a little advice for future use.
Glenn Roemer thanks for the advice. ~Mr. C.
🙂🙂🙂🙂👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍AWSOME AWSOME video thank you for information
This was a big help. I'm doing this job now. Did you use the old base with the new motor? Isn't that supposed to come sealed with the sealant already on the base connecting the jug?
@lance7413 glad you found it was useful. I used the new crankcase "base". Mine did not come pre sealed so I had to seal it. I would use three bond 1184 now instead of rtv. I have not had a problem with the rtv but 1184 is gas resistant and should last longer. Excellent question! ~Mr. C.
@@NaturesCadenceFarm mine came pre-sealed.
@lance7413 interesting. Thanks for sharing. I like knowing this stuff. My good friend Dr. Cutter has a channel dedicated to chainsaws.
m.youtube.com/@ChainsawHospital/about
I think you will like him too. 😁 ~Mr. C.
It’s job buddy trust me
@Lonnie Pruitt you are correct. The process is straight forward but is tedious. There are so many little things to do it adds up to a big job. Not bad at the end of the day and in my opinion. Worth my time to get her up and running again for not much money. She is still going strong. ~Mr. C.
@@NaturesCadenceFarm I got mine broke down.. putting new lower case assembly.. going be slow process
@Lonnie Pruitt how is the build going? Purring like a kitten yet? ~Mr. C.
Can you just go with new piston and cilinder from 390?? Everithing else is tmhe same????
@goranmalnar5172 you can do a piston and cylinder. Everything on the bottom end is the same. I chose to replace everything due to the ease of swapping it out after the major meltdown that happened and the age. With the old assembly the bearings and seals were in bad shape. Excellent question! Thanks for watching and asking. ~Mr. C.
Hello and thank you for these beautiful videos.
I myself have a stihl ms 290 which I will change the carburettor because I have a problem at this level.
The start phase with difficulty and once start when I released the accelerator it stops, I cleaned the carburetor but without result even changing the settings. A person told me it was the piston but I have no way of knowing if it is him, on the ignition side, the spark is very good.
I came to you to know the reference of the engine you installed and especially where you found it.
Looking forward to your reply, thanks again for his videos
I had one with the same problem. Ran fine wide open, would die at idle without hitting throttle. Cleaned carb and checked spark, fuel lines, etc. Stihl dealer ordered a carb kit and it's running fine now.
alain Gaillard I added a link to where I purchased the engine in the description of all of the videos in the series. I would say a carburetor issue but it could be a lack of compression from worn rings or a vacuum leak in the crankcase. Thanks for watching and good luck. ~Mr. C.
My 029 finally died and will cost more than a new saw to have fixed by a Stihl shop, so I'm learning how to do the swap as you showed. Question - did you have to re-jet the carb or replace the carb with a larger size for the bigger bore? If so, what carb or jet did you use? thanks
Eric Mueller you present a great question. I researched this topic in depth when I was planning the swap. During my quest for knowledge I found the factory 029 039 MS290 MS310 and MS390 all share the same Stihl part number for the carburetor. For my swap I used the original carburetor (no re jetting) from the MS290 and adjusted accordingly to the new cylinder. One day I will tweak it a little more now that I have a tachometer. Thanks for watching! ~Mr. C.
I have the MS291-will this conversion work for it also?----Great video
Dianne Dahl if the question is, are the parts interchangeable? No. The MS 291 is a completely different engine design that utilizes stratified scavenging. The process may be similar but I have not had the chance to work on a MS 291. Thanks for watching and asking. ~Mr. C.
I've been looking for engine swap videos for a long time, thanks for sharing this. I have spare Stihl MS 251c-be that had straight gas put in it. I've been wondering if I'd be able to put a larger motor in it in order to run a longer bar, e.g. 22", 24". How would I be able to figure out if this 251 powerhead/frame will accept a larger motor? You mentioned you did some research - what sources did you use?
Shawn F I looked on Amazon and found a Big Bore kit for the MS290 to make it a MS390. I have done some looking around for you on Amazon for handles cases etc. and found the Stihl MS231, 251 are built on the same case. The 251 has the largest cylinder (44mm , 45.6cc ) in that class. The clamshell design limits or nearly eliminates any performance modifications to the cylinder. Hope this helps. Thanks for asking! ~Mr. C.
Did that eBay motor come pre assembled or did you put it together yourself?
R G excellent question! What you see
at 1:48 in part one of the video series is what came out of the box. Assembled and everything. Thanks for asking! ~Mr. C.
ruclips.net/video/jLAdWmMqbP4/видео.html
Will the bottom work if i just put the top and piston?
Ben G from what I can tell yes. I looked on the one I received and everything looked like it would be fine to do just a top end and piston swap. The reason I went with a new bottom end is I wanted new bearings and seals down there. If you do just the top end be sure to check the bearings and seals for excessive wear that might cause mechanical damage or an air leak that would cause a lean condition. ~Mr. C.
Can you upgrade the housing on the ms390
Martin Skerratt I am not sure if this will answer your question but here goes. Yes you can purchase a replacement case from Stihl or Farmertec but I would not call it a upgrade. Hope this helps. Thanks for watching and asking. ~Mr. C.
Great job. could you tell me which ebay seller you got the ms390 from. thanks dennis
Dennis Kuchar thanks for the super nice comment. I have placed a link to the eBay item in the description of all of the videos. I just tried the link and it still works. Thanks for watching. ~Mr.C.
do you have a link of the knock off assembly you used? I never know who to trust on these
Timidater here is a link to an item very similar to the item I used. I hope this helps. ~Mr. C.
www.ebay.com/itm/ENGINE-MOTOR-CYLINDER-PISTON-CRANKSHAFT-FOR-STIHL-MS390-MS290-MS310-029-039-49MM-/302731812165?hash=item467c38dd45
@@NaturesCadenceFarm You should add this link to the description on all 3 videos. Very helpful.
Carson Jensen I added the link to all of the descriptions. Thanks for the idea. ~Mr. C.
@@NaturesCadenceFarm Thank you Sir!!!
Would you be interested in swapping mines for me if I provided all the parts and paid you ?
Dun Rite Lawn Maintenance currently I am not ready for repairs on customer saws. I really appreciate the offer and maybe in the future I will be providing that service. Thanks for asking and watching. ~ Mr. C.
Be careful of Chinese parts, that's why they're so cheap. Ask around to knowledgeable people for decent brands. The 029 is the earlier version of the 290. Tank assembly is the same for all 3 models as are the rest of the parts. As for those seals there's 2 versions but 1 set has only 1 lip instead of 2. That's a common upgrade of motor size. Since all of these Chinese parts have flooded the market Stihl parts have come down in price to where it's far more attractive to go with those. In my case if a customer wants Chinese parts installed there's no warranty. Call that however you want but I've seen some junk that came from there. Also remember that customer may tell whoever that you put it together with cheap parts. There's a very fine line on being the best mechanic in 3 counties if it turns out ok or the worst SOB if it goes south.
@Darrelle Pickering you have provided very sound advice. I agree, the parts are hit and miss. I have had very good luck with this particular engine in this power head. I really like this saw and rely on it regularly. I have another 029 that got scored badly and needs a rebuild or upgrade to the larger cylinder. I will look into the cost of OEM parts for that build. Thank you for the excellent insight and information. ~Mr. C.
@@NaturesCadenceFarm It's been a lot of years but I saw the 029/039 introduced. The 029 Super turned into the 310. Stihl has played around with cylinder size for a long time as had others but Stihl did it best I think. The 029/290, 310, 039/390 all take the same chassis hence nothing changed except cylinder size. When the 029 came out it used .325 chain & people weren't impressed till someone put 3/8" chain on it. Then they found out it cut great but longevity was gone. Somewhere in there Stihl sent out a SB about the lean settings of the carb from the factory. If those saws came in with 3/8" chain (hazy memory) I think weren't warranted but not sure. I do remember rebuilding at least 2 saws & 1 of those the owner paid for the 039 upgrade. It's very common for the crank seals to fail on just about any Stihl product. If you have 1 giving you fits, check spark 1st, compression 2nd unless that's obvious, case leaks next.
I regret getting this saw. I wanted to like it but my husquvarna has had more use and zero problems while this stihl has been constant problems. I will put a chinese engine in it.
Hot Dogs I have had mixed results with these saws. I own an 029 and two MS290s. The 029 and one MS290 have had serious engine problems. The other MS290 has had no work and always runs well. I have some Husqvarnas ( 266xp, 55 rancher , 460 rancher, 335xpt ) and have been very pleased with their performance and longevity. ~ Mr. C.
You skipped steps
Timothy Tonole thank you for letting us know. If you wouldn't mind, please inform everyone of the skipped steps. It will help the community with complete information and help me make better content. ~Mr. C.
LMAO this an all day project - just buy a new chain saw. Time is money! i have a dozen saws and other than new chains (i dont sharpen either) they go in garbage when they have issues. PS - electrics are just awesome now unless you need felling over 14".... never have issues.
@aimless1700 that is a valid point of view. I enjoy working on things and learning how they function and what it takes to get them going again. The waste of time statement is subjective, I find it to be enjoyable and relaxing. To each his own. If you are near the central east coast of the US I would love to catch up with you sometime to take those junk saws and dull chains off of your hands and save them from the landfill. Send me an email. I will try an electric one day. I have heard great things. Thank you so much for taking the time to share! ~Mr. C.
naturescadencefarm@gmail.com
@@NaturesCadenceFarm Little far I''m outta pensacola Fl. I give all my guys electric Stihls nowadays so far less saws "go bad" anyway to give you. In 3 years all I had to buy is batties bars and chains. They are just amazingly reliable and work for most work.
@aimless1700 that is a little far. Thanks for getting back to me. That's good information on the battery saws. In the future I am sure I will get my hands on a battery saw. A buddy has a 40v Ryobi and swears it will out cut everything I own. We have a video idea, we just need to get together and get it done. Thanks again for the reply! Happy sawing! ~Mr. C.