Engine Rebuild On Husqvarna 55 & 51 Chainsaw Part 1/3

Learn How To Rebuild the engine on your Chainsaw in this easy to follow video tutorial.
PART2
• Engine Rebuild On Husq...
PART 3
• Engine Rebuild On Husq...
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Due to factors beyond the control of DONYBOY73 “The Small Engine Doctor”, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. DONYBOY73 “The Small Engine Doctor” assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. DONYBOY73 “The Small Engine Doctor” recommends safe practices when working with power tools, hand tools, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of DONYBOY73 “The Small Engine Doctor”, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not DONYBOY73 “The Small Engine Doctor”.

[@rossrossier935]

Just picked up a used 51 from a friend, now know where to start, Thanx Donyboy!

[@bruceruben1060]

thank you so much for your video, with your perfect instructions I was able to rebuild the top end of my 24 year old Husqvarna 51, you saved me hundreds of dollars and gave me a sense of accomplishment ,thanks again Bruce

[@dmuirwatson]

Hey thanks alot for posting this video. I got an NWP big bore kit for my makita/dolmar 6401. i've never put a piston or cylinder on anything before, but after watching your video it took me 1.5 hours from start to finish. I've run two tanks of gas through it and it's running great, so i guess you taught me the right way to do things.

[@goldenruleplumbingservices3657]

Hey man great video, I just rebuilt the top end on my husqvarna 51 chainsaw. This video helped my out a lot and made it easier being my first time doing this. Thanks!

[@tarasbulba3190]

Hope your 51 does well. Getting a kit for my 51 rebuild. Do you have a recommendation?

[@KASPLARFO]

Wow. Your demonstrations and camerawork are outstanding. Namaste.

[@timsturgill3617]

You have inspired my brother & I to open up a small shop at my home Don

[@spelunkerd]

Really good lighting and audio for this video. First class.

[@allamakee1397]

An Excellent video on my favorite chainsaw. Have been using mine on my farm since 1999, sill running well. Been thinking it's time to rebuild and run it another 10 years. Thanks for the upload. You are a very good teacher.

[@donyboy73]

+allamakee1397 thanks

[@WillsGarage91]

I would recommend giving the whole saw a good cleaning with an compressed air hose before taking anything apart.

[@aroostookboy1]

Dumb question, why wouldn't you at least blow off the crap before you expose any internal parts of the saw ?

[@Excursioncito2000]

that saw looks good to work on. briliant vids thanks

[@shakin-it-boss]

Nice video. Seems better to clean it before disassembly?

[@michaelchilders6056]

Another great video!! Thank you again. 👍👍

[@williamhoward7121]

Excellent, best video showing linkage! Thanks

[@donfavro3599]

A beautiful day in the neighborhood.

[@ksemi02]

Thanks for the video! Helped me rebuild mine with no issue at all:)

[@timsturgill3617]

We have enjoyed every one of your Videos

[@MARROCATEL]

Dony hello, I love all the videos you upload are very interesting I am car mechanic and I also like power tools and machinery repair especially chainsaws, thanks for uploading the videos and I hope to upload many more, a greeting from Spain.

[@dales1240]

I have acquired a Husqvarna 55 that I'm having trouble adjusting the carb. I've replaced all the lines and rebuilt the carb, mostly by watching your vids, thx! I have replaced the seal on the crank side but am unsure about tearing into the sprocket side to replace that seal. Do you have any videos on doing this? Great videos, very good instructions.

[@alnewell31]

Thanks, very good instructions and camara work.

[@Lasselkv28]

Very nice video. I just did the same to my Husqvarna 353 a few days ago. Was not as worn as this one, but enough to make it very hard to start and low on power.

[@tedtottle6424]

I am going to be getting into this trade and you are a good teacher, thanks Donyboy73 I will try to rebuild my dads old chainsaw with your help thanks.

[@donyboy73]

you're welcome

[@MatthewW713]

Great video! Thanks for sharing.

[@THEMOWERMEDIC1]

man that piston is toasty.....i dont know how many countless " mechanics" come to work for us that will try to tune up a burned up saw.....it wastes valuble time and money.....excellent toutorial don

[@Langbaurgh]

Hi there, do you have a video to do the same piston rebuild on a Husqvarna 61 saw? Your videos are the best a...

[@donyboy73]

@spelunkerd thanks, i really tookmy time on this series, part 2 tommorrow

[@donyboy73]

@backwoodsctryboy thanks man, yes many people don't realize when the top is burned.

[@billyj7763]

Thank you for posting great help in doing my 55

[@royreynolds6915]

I have to do this for my Echo CS-530 that seized when a friend didn't add oil to the gas. Where do I buy less expensive parts than OEM? I'm hoping my disassembly won't be too different from your Husqvarna. Have you, by any chance, uploaded a video of this kind of repair for Echo cs-530? Many thanks for your clear presentation!

[@agathes1641]

Really nice video. my 55 has just died after 16 years of hard work and your video is exactly the problem I have. Nice work

[@donyboy73]

@arribanuevoleon try the pin and or bearing from the old one, unfortunately sometimes these chise kits may not be an exact fit unless you were sent a different one, you could always exchange it for another one

[@ntoukou]

Congratulations!It was a very helpful videoThanks

[@richc852]

Followed your videos and what able to rebuild my Husqvarna 55 without an problem. This was my first time rebuilding a small engine. Thanks

[@donyboy73]

nice to hear that!

[@allenletizia321]

Nice job!

[@donyboy73]

@sscustoms100 u can cut slots in the screw with a dremel to use a flat screwdriver

[@VAHOSS]

Great video man... Very informative!!

[@vidsharing10101]

GREAT JOB ! i have a few videos up on engine work that i do for fun. i see you do this for a living - keep up the good work ,this would be helpful for someone rebuilding a little motor.

[@donyboy73]

not yet, I would have to see your saw to give you proper advice

[@sscustoms100]

@donyboy73 very good ,just having problems tunnings the carb its got the special type of ajusters on it like its got a small v-shaped key hole type like the tool you use in your videos so im goin to switch the carb of a nother homelite with normal flat head ajusters but she runs and has good torqe to pull me being 6ft 3 86kg

[@somethinburnin]

I got a 55 Air Injection. Great saw!! Keep it clean frequently. I use Lucas Semi-Synthetic oil in a 91 Octane Non ethanol gas. Hope I never have to tear the bugger down.

[@donyboy73]

yes I believe they fit

[@kennys8040]

My 1998 55 Rancher left carburetor bolt keeps working out. If I saw right from this video, those bolts don't actually thread into the block but just plastic intake assembies, right?

[@fupa74]

I have that same saw, runs good until i put it ot a log then it bogs right down like it is going to stall. I clean the carb, changed gas and spark plug and cleand air filter. Any ideas are welcome...Thanks Great vids and keep them coming

[@daand12]

@donyboy73 I gonna take out the piston pin tomorrow, because for new rings i need go to the dealer. And i want that they insert the piston into the Cylinder ( before i break more rings ) Installing the Clips back is easy. I dont know if thats possible with an screwdriver. Taking out that is possible, I also can see some scoring on the piston and Cylinder, but i cant feel that by fingers. I used sandpaper to remove Carbon on the top of the piston. But dont forgot the engine is 17 years old.

[@barryzoo5923]

thanks for making this video

[@nadingjeff]

Say don I have a Husqvarna 61, bought it used. I need a new clutch, looks like the last owner tightened the clutch to tight and broke the center out of the nut that acts as a stop on the end of the crankshaft to keep the drum from impacting the oil pump and crankshaft seal. Any idea where I could find one that does not cost allot? Looked on EBay, all I can find is a clutch that does not have the center stop built into the nut.

[@donyboy73]

i'll have to look at a flywheel in my shop, please remind me in a week if i have not responded back

[@peterschultz4852]

Hey Donyboy, I followed your videos step by step for my Husqvarna 51 but it will not start. I flooded it so now I am just letting it sit. What do you suggest I check or do? Thanks

[@donyboy73]

if it's not for commercial use they are not bad but try to get it NIKASIL plated

[@ciribincin45]

thanks Dony!!

[@donyboy73]

@sscustoms100 how's ur bike project coming?

[@ciribincin45]

hi Dony, finally i rebuilt my husqvarna 55 following your videos, everything is working good, but i found one pawl starter broken, i already take the flywheel off but i have no idea how to change the pawl, could you tell me what type of tool need to remove it. thank you again

[@Gojigwr]

Thanks for posting this! May I use top end parts for a Husqvarna 55 to rebuild my Husqvarna 51 saw?

[@anthonyoriordan5967]

Is it possible to upgrade my 50 rancher with this top end Donny

[@GmGarlo]

Great video , Donyboy, on that saw , how do you lube the grease bearing?

[@sukuhz8962]

I need to order top end for my Husqvarna 55, I have removed the Spark Plug and it is real visible that it has been burned out. Could you please let me know where you ordered the parts mentioned in this clip. Web site where I can order these parts (the top end). Thanks, great videos.

[@ronniekoecher4640]

Hi Donyboy73, long time listener of your videos about chainsaws specifically. I have recently received a Husqvarna 340 from my grandparent. I took it apart, and almost everything is O.K but my safety throttle is stuck down. Could you make a short vid on taking the gas tank apart and showing those parts? Or any help is much appreciated!

[@johnvandyk2592]

Thanks for the video. I pulled my 55 apart and could not believe the piston ring was also fused to the piston. I did not think it was really that bad. The new top end just came in the mail from, wait for it....China.

[@johnvandyk2592]

+J. Van Dyk Done! I rebuilt the carb and the top end for under $100., and it started on the third pull. Donyboy 73, my hat is off to you, sir. Thank you!

[@donyboy73]

+J. Van Dyk thanks, good work

[@johnvandyk8904]

Wow! Has it already been 8 years? Well it sounds like it is time to rebuild it one more time. Glad you did not take down this video! Let you know how it turns out.

[@allenletizia321]

When Toke the head off carbon on top of the piston and look inside cylinder some by plug inside screw in . Other that looked ok . I put new cylinder head and piston . Also new carb . Spray starting fluid start right up but shut off . Got new gas filter . What else could I check ? Does carb come all preset ? What check next do you know?

[@OregonDX]

I like how he says remove fuel and oil at the end. lol I wonder if people actually forgot that.

[@donyboy73]

@daand12 if you remove them carefully usually you can reuse them

[@jeffdenney4148]

Do you have a video on a husqvarna 455 big bore kit

[@orangeduramax4911]

Just wondering I have noticed you never clean or blow away all the dirt and garbage before you pull engine apart. Can u explain why?

[@daand12]

I hope this helps for me, because i have to install new rings on a Tomos A35 engine. 1 ring broke in pieces while putting the piston back in to the cylinder

[@daand12]

also i removed the circlips with a screwdriver. Just few seconds work. Do i need to put new circlips?

[@theoldwizard998]

Simple question. Why don't you do a quick clean up (blow the loose bits off with compressed air), before you remove the carb and cylinder ?

[@942doc1]

what would be your opinion that when a piston is scored you can see it on the exhaust side?Because both good and bad gases always escape or how?

[@alexmaltais1]

hey thanx !!

[@donyboy73]

just got a cordless 1/4" impact

[@donyboy73]

where are you from

[@duterteistotallycrushing4520]

I inherited a Husqvarna 55 from my grandfather. I started to clean it up last weekend and found it to be in great shape overall, except the area inside the chainbrake cover was scorched. The brake would not disengage. After taking the handle apart I saw there was a spring that had broken. I went ahead and ordered a used brake assembly I found on ebay due to the overall burn damage around the brake ring. Cost me $40. Now I have a good brake and the old one full of good parts should I ever need them. To replace the spring would have cost me 5 or 6 bucks, but the cover was so burnt up I didn't want to chance it causing more problems down the road. Only thing I can figure is that he ran it without chain oil at some point or let the area get too clogged with sawdust. Any ideas what else could have caused this area to burn?

[@donyboy73]

sometimes they run them with brake on and the clutch gets extremely hot

[@kaktusjack1033]

awesome video! this is gonna help me in my rebuild. one question though, what seems to be the cause of such bad piston / cylinder damage ? i have seen on my dad's trimmer that kind of damage :-/

[@donyboy73]

Kaktus Jack usually not enough oil in gas

[@kaktusjack1033]

donyboy73 thanks for the answer. will buy tommorow new piston + piston ring + cylinder and do the rebuild. Crankshaft and crankcase seem to be fine.

[@michaelpatzold6781]

many thanks, very helpful video:-)

[@jbstaten]

Is there a good way to plug the intake side for a pressure test on the rancher 55? I suspect there is a leak somewhere. Leans out in the cut.

[@johnhayes993]

what parts do you need for a husqvarna 141 chainsaw engine rebuild and where do i buy the parts

[@donyboy73]

checkout www.discountonlineparts.com

[@TheThecyclist]

have you any videos of stihl weedwacker repairs(we call them strimmers here in britain)

[@wcjcnc]

Hey donyboy73. Every now and then I get a chainsaw that's really hard to pull. The pull rope is really jerky, and seems to hang up, break free, hang up, break free, etc. With the plug out they pull really easy. It's not flooding or a clogged exhaust port, or the recoil mechanism. They have great compression and everything seems fine. What the hell causes this? I know it's not normal compression that causes this. I also know the flywheel key is not sheared because I always check. I work on a lot of chainsaws but I get one like this about once every two months and have no idea what causes this.

[@praecantrix]

same here. i just got a stihl ms250 and a husqvarna 55 in my shop at the same time and i can't seem to fix them

[@gorgon9786]

Can it be the clutch wheel or sprocket whom has a scoring, or starts bogging out?.. seizes up the free run of chain..?

[@jeffreygoldsmith3191]

I have a husqvarna 50 and was wondering if I would go through the same steps to replace the head.

[@donyboy73]

yes pretty well identical

[@jeffreygoldsmith3191]

donyboy73 When I took the new head out of the box I noticed that there was a place for the release valve which the 50 doesn't have. Can I plug that with a bolt?

[@donyboy73]

Jeffrey Goldsmith has to be short

[@chicosilverhill]

In the video you said the cylinder head is chinese. Or from china. Where did you order it from?

[@mathewkromeo2934]

So if a chainsaw "dies" you can rebuild it?

[@donyboy73]

NOT SURE OFF HAND, I WOULD HAVE TO SEE IT

[@AffordableHeating]

Your videos are awesome bro. Hey SHADOWc0n I don't think anybody tears their chainsaw apart on the first view of the video so it doesn't matter does it??

[@thomaschase1719]

Worked great, one summer later and the engine seems to be running too hot again... that led to the last misfortune. Could it be sugar in the gas tank or can it only be monkeying with the carb high idle sets? I'm thinking I can block the ends off the carb set channels temporarily with silicone if that's my easier solution. Any thoughts?

[@thomaschase1719]

I'm on my third cylinder with minimal actual time on the saw.

[@thomaschase1719]

And a new saw is no solution to vandalism.

[@petenistler7816]

Air leak

[@philwalz8767]

Have you done a rebuild on a Husky 350 x-torq? I picked up a trade-in saw that has the bar bolts starting to pull through the case (previous owner over tightened the bar). The rest of the saw is in good condition. Any thoughts to fix this?

[@daand12]

@donyboy73 The moped is running again. First start was ofcourse without exhaust + new piston rings. My dealer saw that the old was worn. Just as normal a bit oil in the Cylinder and piston and a bit to much on the crank so there was a little bit to much oil in the crankcase. Now only i had to put the old exhaust gasket, because i wasn't able to screw the bolt in with new gasket.

[@donyboy73]

@atkwayzata thanks for the tips

[@donyboy73]

not at the moment, i think davidsfarm has one

[@stephenjharnois]

I know you know abouts saws more than me but why didn't you clean all the dirt and grime prior to openening up the motor?to me that would be number one step

[@donyboy73]

@MARROCATEL thank you, part 2 tommorrow

[@942doc1]

what is it called?and thank you

[@Travis_H]

where did you find the chinese rebuild kit?

[@biggray94]

how much do you carge for the labor?

[@pivotboy63]

@xxtruckin93xx well since its that old you should clean out the carbon anyway, but that doesnt always cause low compression, it could be bad rings

[@xxtruckin93xx]

if i got a lot of carbon in my Tecumseh motor can i loose compression and when i did a compression test it gave me a 85psi reading and when i added oil i got a 105psi reading what does that mean bad rings?

[@Buzzy1960]

Hi donyboy73, I have a Husqvarna 353 E-tech green gas cap saw and my nephew`s bro. in law over heated it bad and a saw shop owner said it would have to be rebuilt...is there a kit I can buy on eBay or wherever?

[@jorgelg8624]

hi nice video, hey I have a question on a partner chainsaw 400, has the gift of feed hose goes carburaor filtroy is connected to, but it has another hole which had a piece of hose and is connected Nose where you could help me.

[@donyboy73]

@zigZag776 yes sometimes i wear nitrile gloves

[@wyattstadnichuk5671]

does the 51 Husqvarna have a decompression valve?

[@donyboy73]

@dmuirwatson good job!

[@donyboy73]

@workensmart i'm not sure what hapenned to this saw