Stihl MS440 FAIL

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  • @johnclarke6647
    @johnclarke6647 4 роки тому +3

    That was exactly what happened to myb361. Your piston was also kissing the counterweights at BDC. To check this I coat the counterweights with Assembly Lube. Install the piston on the connecting rod. Put the cylinder on and rotate the crank around for several revolutions and then pull the piston off and check for assembly lube on the skirt of the piston. If there is any, I mark those areas and grind off the markings with my Dremel. I keep doing this test until there is no more assembly lube on the piston skirt. I think I did the 361 about five times. After it came out clean I ground the whole inside Skirt area one more time to build in some added clearance. I also sanded the bottom of the skirt until the height of the piston was the same on each side of the piston. I did one final check after I was through to make sure the piston was not contacting the counterweights on the crank.

    • @VideosByAl
      @VideosByAl  4 роки тому

      Great technique. Glad your 361 is going strong.
      Thanks for watching and commenting.

    • @Sensei948
      @Sensei948 3 роки тому

      @@VideosByAl 140psi Good compresion 372xp oem?

  • @johnclarke6647
    @johnclarke6647 4 роки тому +1

    It wasn’t smacking the counterweights but I think it was just kissing it. Farmertec had relieved the skirt but not enough. Walt found the same problem on the 361 that he built. I bought a brand new cylinder, piston and crank from Farmertec and put them in. Mine hit so hard it threw a piston pin circlip and bent the rod. Aa at idle.

  • @jasonpearce6968
    @jasonpearce6968 6 років тому +2

    your not the only one mate I'm a second generation arborist I have a ms 440 and exactly this happend on the intake side . . my con rod bent too thou . . so I did a near full rebuilding . . new bearings new conrod an new piston . . now she runs like new :-)

    • @VideosByAl
      @VideosByAl  6 років тому

      Thanks for watching and sharing your experience with the MS440.
      I really like the saw, and will rebuild it again if the block holds up.

    • @jasonpearce6968
      @jasonpearce6968 6 років тому

      +VideosByAl your welcome I enjoy your channel . . I hope it holds up for you . . I love my ms440 it's a great saw

  • @alexgarrett3047
    @alexgarrett3047 7 років тому +4

    I also noticed in the video you said the saw idles alot on concrete. idle is when it's at the leanest should never let them idle for long periods of time. If you haven't done a leak down test I would run it for 5mins cutting and pull the plug and see what it looks like it should be light brown in color if it's white it's to lean and sacking air through crank seals more than likely with all that metal in the bottom end

    • @VideosByAl
      @VideosByAl  7 років тому

      The saw could idle for 2-3 minutes while I move Logs around.
      I did not want to bake the saw by just shutting it off right after a cut.
      Maybe on this saw I need to let it idle for 15-20 seconds than shut it off.
      I'm bad about pulling the plug and reading it. too lazy.

  • @johnclarke6647
    @johnclarke6647 4 роки тому +1

    You were lucky, when my 361 ate a circlip it bent the rod and it had more damage than you seem to have experienced. It is doing fine, now but I had to completely rebuild it. I bought a new short block but these are not assembled according to my specs, so it would not pass a pressure test. Therefore I rebuilt my existing cases. Farmertec does not use any sealant on the case or base gasket. I use 1184 on the case gasket and Dirko HT on the base gasket. I did replace the crank seals in the 361 but not my 440. If it failed on the intake side you lost a circlip and from the damage, you lost it running.

    • @VideosByAl
      @VideosByAl  4 роки тому

      I was at WOT , and it started to loose power. I chopped the throttle and it stalled instantly.

  • @v26224
    @v26224 5 років тому +1

    This is not an issue of it dieing because it is a stihl, the damage to the piston and the disintegration is a sign of dirt injection wearing it thin to the point of failure. Clean your filters more often and keep the chain sharp and your problem will be solved

  • @johnclarke6647
    @johnclarke6647 4 роки тому +1

    It is difficult to clean out the crankcase of a 440. I just did it because my 440 likes to eat circlips. If it had been running at the time I would have had to split the cases but it came out when I was cranking it and I only had to get it out and a few pieces of the piston. It is back together, now, and running fine. I did wash out the crankcase with two cycle, break cleaner and compressed air, several times and re- lubed everything good before re-assembly.

    • @VideosByAl
      @VideosByAl  4 роки тому

      I’m confident my cleaning job was complete. Then applied plenty of lube.

    • @ayenayie6089
      @ayenayie6089 3 роки тому

      yeah my 440 to also quite hard to clean up. now my problem is the oil pump to the chain itself. the oil keep leaking under body and oil didnt come out to the chain bar. 😩

    • @johnclarke6647
      @johnclarke6647 3 роки тому

      ayen ayie the 440 has a metal hose pumping the oil from the pump to the discharge hole in the case. Make sure that metal hose is properly connected into the case. I got two lil pumps in my 440 kit and the first one did not connect, properly. I replaced the first one with the second one and it worked fine. As I remember, the metal hose has a little o ring on it and it snapped into place when connected properly. If mine was leaking, I would just replace it with another one. The bend in the metal hose must be correct to get it to lock in.

    • @johnclarke6647
      @johnclarke6647 3 роки тому

      ayen ayie I forgot to add the worm gear arm can hit the metal hose, so make sure it does not, because it can destroy your worm gear. Connect the metal hose and then bolt down the oil pump because it can disconnect if you do it otherwise. It is a very delicate installation, so be careful.

    • @ayenayie6089
      @ayenayie6089 3 роки тому

      John Clarke thank you for your information sir 👍🏻 i will make sure it done well.

  • @scotttree1
    @scotttree1 5 років тому +1

    My big bore kit broke rings in a year on my 046. 6 years later still running strong with stock parts, just sayin!

    • @VideosByAl
      @VideosByAl  5 років тому

      Ya, I hear that. I had 2 kits fail . The saw is sitting on a shelf

  • @Sensei948
    @Sensei948 3 роки тому

    140psi Good compresion 372xp oem?

  • @johnclarke6647
    @johnclarke6647 4 роки тому +1

    It’s junk! Not necessarily. I had a 361 kit saw that did basically the same thing. I had to drive the piston out of the cylinder. I had a bent connecting rod and a grenaded piston. I had aluminum parts all in the crankcase. The cause was that Farmertec had not relieved the skirt on the piston to miss the counterweights. It was not hitting the counterweights but it was kissing them and after seven tanks it broke. I split the cases and replaced the broken parts. I did modify the new piston skirt to clear the counterweights. I now perform this check on all kit saws. My cases and bearings were fine. I just cleaned them up, put in a new crank, seals, piston and cylinder. It has 10 tanks on it, now, and it runs just fine.

    • @VideosByAl
      @VideosByAl  4 роки тому

      I was unaware the piston skirt was so close to the crank weights.
      I’ll have to investigate that.
      Thanks for the heads up.

  • @yveskc1
    @yveskc1 8 років тому +1

    If Linda's willing to pay.. Go for rebuilt parts ! LOL. No matter what brand, after a wild, they will puke out some bits and bytes.. Keep us updated and best regards -Yves

    • @VideosByAl
      @VideosByAl  8 років тому +2

      The kit is only $140 delivered. A new MS461 is $1000.
      Linda wanted to try the kit.
      If it fails to start, Bibbyman2 wants some of the parts for his 044.

    • @Sensei948
      @Sensei948 3 роки тому

      @@VideosByAl oil mix 1:33 ?

    • @VideosByAl
      @VideosByAl  3 роки тому

      @@Sensei948 50:1

  • @bibbyman2
    @bibbyman2 8 років тому

    I can use the handle bar and the trigger grip bar. My 044 has met with a few accidents.

    • @VideosByAl
      @VideosByAl  8 років тому +2

      Spoiler Alert ! Parts just arrived today.

  • @alexgarrett3047
    @alexgarrett3047 7 років тому +2

    Do this go to a shop and Dirko sealant but it on both sides of the base gasket. Put the saw together then take it to a saw shop and have them run a leak down test on it. It may cost a couple dollars but least you'll find the problem. I put one of those big bore kits on a ms460 for a tree company even though they are junk they got 2 years out of it. Idling for 2 to 3 minutes is to long it's like any air cooled motor at idle it's building more heat than being shut off. The flywheel forces air through the cooling fins more at high rpms than low rpms. idling for 30 seconds is the tops I would do especially on a after market big bore kit

    • @VideosByAl
      @VideosByAl  7 років тому

      Even more great information. I'll find some Dirko Sealant.
      Thanks for taking then time to provide good information.

    • @alexgarrett3047
      @alexgarrett3047 7 років тому

      No problem anytime I work on saws day in and day out. That sealant works the best I have found. Fuel and oil won't break it down wear some gloves when you apply it because you won't get it off your hands for weeks

    • @VideosByAl
      @VideosByAl  7 років тому

      I'll to get the Dirko Sealant from Amazon. Can't find it local yet.

    • @charleswinters7129
      @charleswinters7129 Рік тому

      @@VideosByAl yamabond. You can find it at any Yamaha shop. It has been used to build two stroke race engines for years. Nothing can compare.

    • @VideosByAl
      @VideosByAl  Рік тому

      @@charleswinters7129 Good info. Our Yamaha dealer is only 20 miles away.

  • @hunterdude3262
    @hunterdude3262 8 років тому +1

    Thats why I switched to Husky. Blew up 3 Stihl and the cost to fix is damn near a new saw.

    • @VideosByAl
      @VideosByAl  8 років тому +1

      I thought about maybe switching to Husky, but the closest dealer really is no help for service, and has to order all parts.
      Stihl dealer is more convenient has most parts or gets them in a day.
      Plus its been 4 years sense the last problem. So I got my moneys worth.
      The Husky does start easier though.

    • @hunterdude3262
      @hunterdude3262 8 років тому

      I have both dealers about 15 min from my house. had mine 13 years no problems at all. gets used 30-40 hours a week.

    • @hunterdude3262
      @hunterdude3262 8 років тому

      Even my Echo CS4600 I use as a limb saw has gave me no problems for 10 years. that onl;y gets used maybe 10 hours a week.

    • @VideosByAl
      @VideosByAl  8 років тому +1

      It's amazing how much abuse those little engines will take.

  • @braulioarroyo597
    @braulioarroyo597 4 роки тому

    Can You do a video on changing the clutche

    • @VideosByAl
      @VideosByAl  4 роки тому

      I appreciate the suggestion for a video.
      I’ll give it some thought.

  • @johnclarke6647
    @johnclarke6647 4 роки тому

    I keep all my repair/assembly tools in a plastic tote. It has everything I will need to take a saw, apartassemble a saw or maintain a saw. I hate having to walk out to the shop to get a specific tool, so I just throw it in the tote. The tote weighs about as much as one of my saws and my saws are not little saws it it has just about every tool I will need for a saw. Limited use tools are kept in my roll away in the shop.

  • @jasonaaron3435
    @jasonaaron3435 6 років тому

    As soon as you pulled the jug off I knew it was bottom end

  • @SkidderKev
    @SkidderKev 8 років тому

    had a 372 husky with a Big bore kit in it do the same thing last year. not a nice sound to hear .

    • @VideosByAl
      @VideosByAl  8 років тому +2

      I don't think it matters who's brand is in your hands, the feeling is the same.

    • @peterford9369
      @peterford9369 7 років тому

      VideosByAl So true,,, when the things flying through wood and the sudden stop happens,,, you're mind goes blank,,,, specially when u pull the cord and it doesn't. Then the blank turns into dollar signs. Going out,,, not coming in. Never pulled one down that far but after seeing the amount of debris in crankcase, unless you do a total pull down and check every speck of it I'd be leary to rebuild. Good luck.

    • @VideosByAl
      @VideosByAl  7 років тому

      It still runs. But at some point it will blow up again. Then we'll split the case and check the crank. New bearingd and seals. All that jazz.

  • @johnsobj
    @johnsobj 8 років тому

    Good detective work. Thanks and good luck.

    • @VideosByAl
      @VideosByAl  8 років тому +1

      Hang on....there is more.

    • @johnsobj
      @johnsobj 8 років тому

      Looking forward to it. :)

    • @Sensei948
      @Sensei948 2 роки тому

      @@VideosByAl 14psi Good compresion 372xp oem?

  • @johnclarke6647
    @johnclarke6647 4 роки тому

    Intake side. My bet is you dropped the circlip on the intake side which grenaded the piston. If it was running at the time you probably need to split the cases and replace the crank and seals, too, in addition to the cylinder and piston. The connecting rod is probably bent with that much damage to the piston.

    • @VideosByAl
      @VideosByAl  4 роки тому

      It would have been a good idea to split the case. However I did not think it was completely necessary. I put it together and it ran.

    • @johnclarke6647
      @johnclarke6647 4 роки тому

      VideosByAl yes, it ran, but for how long?

    • @VideosByAl
      @VideosByAl  4 роки тому

      About 3 years. I tore the intake boot after servicing the carb. It needs to be honed and a new set of rings.

  • @alexgarrett3047
    @alexgarrett3047 7 років тому

    Scoring on exhaust side it's run lean. The saw is not tuned correctly. Second failure better do a leak down test and see if the crank seals are wasted from the first failure. Invest in a tach it will help with tuning get you close and then tune it in the cut

    • @VideosByAl
      @VideosByAl  7 років тому

      Thanks for the information. I have a Brigs and Straton viber-tach with the wire that shakes. Is that going to be accurate enough ? it does read to +15,000 rpm.

    • @alexgarrett3047
      @alexgarrett3047 7 років тому

      Your way to high on your rpms at 15000 that's for Woods ported and muffler mod saws you should be at 13500

    • @VideosByAl
      @VideosByAl  7 років тому

      It's not set at 15k , just the viber-tach goes that high.
      I'll make sure to keep it under 13500 ;)

  • @Wanous-hv7zo
    @Wanous-hv7zo 7 років тому +1

    let me guess the piston clip came out got between the piston and cylinder? aftermarket stuff is garbage. the only one thats good is meteor or oem. thats all i use i have tryed that garbage it always comes back every time. JUNK

  • @royreynolds108
    @royreynolds108 8 років тому

    How about Homelite, Echo, or Poulan? I have had good service with my Homelite.

    • @VideosByAl
      @VideosByAl  8 років тому

      Back in the Day , Homelite was a contender for top saw brand. However I don't think they make a line of big saws for our industry anymore.

    • @jacquesblaque7728
      @jacquesblaque7728 7 років тому

      Nowadays, try the bigger Echos, or Dolmar/Makita, Husqvarna, Jonsered. IME, stihls are overpriced and over-rated. Current ones are a bear to work on; e.g. 441CM. Thirty-day warranty not a real confidence-booster. Land Trust lads I volunteer with have a 441CM. Just past 30-day warranty, it sucked a 1/8" steel sphere in the exhaust between piston & port edge. Lunched both. Dealer said "Sorry, no coverage. Can't fix it. We can sell you another for $1K.) I got sucked in to R&R p&c. Never again on Rube Goldberg POS like that. (Love my 576XP-AT and Dolly)

    • @VideosByAl
      @VideosByAl  7 років тому +1

      Problem is we only have Stihl Dealers in our area that also do service.

    • @jacquesblaque7728
      @jacquesblaque7728 7 років тому

      All we have locally is ripoff dealers, of anything. Neither is a problem, if a saw is well designed & built and you can give it basic cleaning & feeding, routine checkover. IMHO. IME almost all saw maintenance goes into keeping chains sharp. Bet you can relate to that! Dealers I buy from are 100-200 mi N of me. 59 cc Echo can be had at HD, ditto used rental Dolmar/Makita 64 cc. Fan of your work, here, Al.

    • @VideosByAl
      @VideosByAl  7 років тому +1

      Thanks for watching and commenting.
      We have been in business for 24 years and have only had to hire the Stihl Dealer to do a Leak Down Test on this saw. Everything else we have done our selves.
      Thanks for letting me know you enjoy the Videos.

  • @STMwoodturning
    @STMwoodturning 8 років тому +1

    i want to see the rebuild!

    • @VideosByAl
      @VideosByAl  8 років тому +1

      The new Big Bore Kit showed up Yesterday, so I'll work on getting a video put together. Sad thing is it took longer to edit the video then to shoot the raw footage. Windows10 and our editing soft ware don't get along.

    • @STMwoodturning
      @STMwoodturning 8 років тому

      I have found Windows 10 to be mostly a pain in the butt too. Wish I could go back to the previous system but have been told by computer geeks I know that Microsoft has made Windows 10 the basis for a lot of future things. Bummer.

    • @VideosByAl
      @VideosByAl  8 років тому +2

      Window 7 worked best with our Editing Software.
      10 is real frustrating .

  • @johnkosheluk1041
    @johnkosheluk1041 4 роки тому +1

    You can't put aftermarket piston and cylinder kits in the coating comes off the cylinder I am a stihl tech and a lot ove people do that on expensive saws it doesn't last trust me

  • @davemartin9774
    @davemartin9774 4 роки тому

    ill take the parts what do u want for it all?

    • @VideosByAl
      @VideosByAl  4 роки тому

      I finished the rebuild , but must have torn the intake boot putting it back on.
      Ran a half tank of fuel threw it while it was lean. I needed a saw that day so I bought a MS461. This MS440 is in a box on the shelf. You can buy the power head for $300. It needs an in take boot.

    • @98fishingfool
      @98fishingfool 4 роки тому

      VideosByAl still have it ?

    • @VideosByAl
      @VideosByAl  4 роки тому

      Yes, $300.00 picked up or $325 boxed up plus freight.

    • @98fishingfool
      @98fishingfool 4 роки тому

      VideosByAl piston and cyl okay ?

    • @VideosByAl
      @VideosByAl  4 роки тому

      The piston is fine, but there was a slight scuff on the cylinder wall.
      I would recommend honing the bore to put the cross hatch back in.
      I’ve seen a lot worse.

  • @royreynolds108
    @royreynolds108 8 років тому

    Get a replacement saw but keep the undamaged parts for spares.

    • @VideosByAl
      @VideosByAl  8 років тому

      I have been watching CraigsList for another MS440. Plenty of MS441's but parts are different.

  • @mattbowen5582
    @mattbowen5582 4 роки тому

    Do u want to sell the blowd up 440 Stihl saw

    • @VideosByAl
      @VideosByAl  4 роки тому

      I rebuilt the saw, but tore the rubber intake installing the carb.
      Ran it for maybe 5 minutes. Check out this video of the light scratches.
      ua-cam.com/video/d0vRdQ2hsKY/v-deo.html
      I boxed it up for another guy but his check has not arrived.
      $325 boxed up . UPS to Michigan was $23.
      I have pics of the boxed up saw I can email you.
      Leave comments on the private video.

  • @mi2tn
    @mi2tn 8 років тому +2

    I think it's toast! :)

    • @VideosByAl
      @VideosByAl  8 років тому +2

      You would think so, but it appears there is only miner damage in side.
      New Big Bore Kit is only $140.00 delivered. I'm going to risk some of Linda's money . Stay tuned.

    • @Sensei948
      @Sensei948 3 роки тому

      @@VideosByAl 140psi Good compresion 372xp oem?

  • @johnkosheluk1041
    @johnkosheluk1041 5 років тому +1

    I am a stihl tech I work on them every day those aftermarket cylinders are junk the coating comes off people by them because thay are cheap but you pay in the long run trust me people do that with the ys420

    • @VideosByAl
      @VideosByAl  5 років тому +1

      Yep, it failed. Broke the piston again. Bought a MS 441

  • @johnkosheluk1041
    @johnkosheluk1041 5 років тому

    You probably got metal in the case bearing you shuld replace the bearings and seal and use a stihl piston and cylinder or Els it will happen agin

    • @VideosByAl
      @VideosByAl  5 років тому +1

      I flushed out the case real well and lubed the bearings. I'm confident the bottom end is fine.

    • @johnclarke6647
      @johnclarke6647 3 роки тому

      John, I think the life of any cylinder combo is how you tune it and how you run it. I tune mine, reasonably rich, and run 40:1 and I have not had one problem with my aftermarket cylinders or pistons, not discounting my screwups. Sure, I would like to have a bunch of thousand dollar saws but I do not.

  • @rockofagesusa7942
    @rockofagesusa7942 5 років тому

    After seeing all this I don’t think I would trust the casing or the crank. Something wasn’t right to cause all that

    • @VideosByAl
      @VideosByAl  5 років тому +1

      Piston skirt broke on the intake side. Block and crank looked alright

    • @mikespain8655
      @mikespain8655 5 років тому

      Need to do compression test and leak down test. Leak would cause lean running condition, but plug condition indicates it was running rich. Meteor piston kits yield mixed results, but Stihl parts ain’t cheap.

  • @stevewrightington1583
    @stevewrightington1583 2 роки тому

    better off to rebuild that baby from the crank up

    • @VideosByAl
      @VideosByAl  2 роки тому

      We ended up selling that saw to a local rebuilder that will take it all the way down , then bring it back into specs.

  • @Wanous-hv7zo
    @Wanous-hv7zo 5 років тому

    Piston pin clip came out didn’t it? Stop buying those junk kits

  • @davemartin9774
    @davemartin9774 4 роки тому +1

    someone needs some power or air tools for christmas and a new saw = (.

    • @VideosByAl
      @VideosByAl  4 роки тому

      I have Milwaulkee M18 Fuel impacts, just did not use them. My camera has noise canceling and that screws up the audio.

  • @usaisalwaysnumber1
    @usaisalwaysnumber1 5 років тому +1

    buy you a t handle torx…….

    • @VideosByAl
      @VideosByAl  5 років тому

      I've thought about that, just never did it yet. Good suggestion.

  • @derKarl_stp
    @derKarl_stp 8 років тому +1

    get a new saw... spare parts can cost the same as a factory new one that actually works well

    • @VideosByAl
      @VideosByAl  8 років тому +1

      We have discussed getting a MS461 as a primary saw and having the MS440 as a backup.

    • @kylecavenig4063
      @kylecavenig4063 6 років тому

      Since it's a 044 you could rebuild it for cheap with aftermarket parts from China I have a 066 kit saw that absolutely rips

  • @PimSchouten
    @PimSchouten 4 роки тому

    Buy a brand new 462, this looks like a write off

    • @VideosByAl
      @VideosByAl  4 роки тому +1

      We bought a 461 to replace this saw.

  • @usaisalwaysnumber1
    @usaisalwaysnumber1 5 років тому

    That saw is FUCKED UP..i would never fix it ,invest in a new one bud or your going to wish you did...

    • @VideosByAl
      @VideosByAl  5 років тому

      The Top End Kits are junk. Piston broke in about 8 tanks of gas. Bought a new MS461.

  • @cory1369
    @cory1369 6 років тому

    We know u don’t clean ur stuff often lol

    • @davemartin9774
      @davemartin9774 4 роки тому

      U got that right. Prob. overheated since he never blew the wood outta it lol. Come on Al, blow it out when ur done 4 the day...Air compressor is ur sawz best friend...

  • @ddyeo503
    @ddyeo503 3 роки тому

    The big bore kit was probably a Chinese kit. Probably should go back to stock parts if the lower end is still good,,,,,,,,,,