Husqvarna 365 Special to 372xpw Conversion & Husqvarna 372xp OE vs. 372 X-Torq. Whats Different?
Вставка
- Опубліковано 7 вер 2024
- A perfectly good Husqvarna 365 Special ( 2004 closed port 48mm version ) gets torn apart and built into a Husqvarna 372XPW 75cc saw. It really doesn't matter which version of that saw you start with, Husqvarna 362.365,372XP, AND the X-torq variants. The process is essentially the same. Also Jonsered variants such as the 2165,2171,2166,2172same deal.
All the Husqvarns OEM parts came from Ashokan Turf & Timber
NOTE: After a bunch of questions,
Contact me on Facebook Group "Chainsaws & Woods Craft" or on "forestryforum.com" ( screen name "weimedog" ) if you are interested in the tools I build
ALSO Started a "FaceBook" Page "Husqvarna Autotunes Only" for those who want to get into the discussion of CST and the more technical side of Autotunes
Really enjoy going back and rewatching older videos. Thanks
When doing a rebuild with a big bore or a bigger piston then say the 48mm to a 50 or 51 or 52 the best thing to do to get that specific crankshaft to live is weigh the OEM the original piston that was ran on that crankshaft the first time it was in a saw. So say that piston was a 48mm piston and it weighed roughly .065kg and the new piston you are using that is let's say a big bore to that specific crankshaft and you use a 50mm piston and say it weighs .069kg the best thing to do is take material from the bigger piston the new piston and get it down to your desired .065 weight. "Note if you are going from a single ring piston to a dual ring piston you have to take .002-.004kg off the piston in order for your weight to be close. Just a helpful tip to everyone 😎
I found a 365 special in great condition like this one that has a 372 top end for sale the other day. He wants $400. Seems like a pretty good deal. I don't really need it but I kinda want it. I did just buy a Makita DCS6421 last week for $250.
Great video buddy I enjoy all your videos for someone as myself I can only learn from watching and doing it. Whenever my 365 gives up the gost I will be doing this thank you 👍👍👍🌲👍
Another great one! So glad you're signing the praises of 32:1 ... Makes me really happy that I stuck with my convictions and what I knew worked and didn't fallow the pack! Awesome vids !!! Go Hutzl !!! 😀👍👍
Singing.... Friggin auto correct!
@@davidthorne6796 32 ml oil in 1 lt gasoline ?
Nice video I'm doing the exact same thing to one I'm working on. Thank you
I have HUSQVARNA 365 special.It is relatively new.On the decompression valve and under have little oil and carbon. Anyway,It seems that chainsaw work normal and the compression is good... I don't use decompression valve for starting..Sorry for my bad english.Thanks for your answer...
great vid. thank, you. Snelling (I think it was snelling), just referenced your Chinese vs. stock vid. I thought that was cool. I saw one if your vids with Bob, and thought he seemed like a solid dude, very knowledgeable, and would stand by his product. so I bought a 562xp. I also remember Maico, and Bultaco, lol. my father used to scramble on a DT1. anyway. thank, you for your vids. I really enjoy them, and am learning a lot (which I really like). thanks again. Russ.
that should have read, "bought a 562xp from him"
this was a fun video and hit home for me, exactly what I want to do. Could you please link the video where you test the new build? thankyou
Great info. I’m going to be doing the same!
you might be getting a little older, but I can tell you was a grizzly when young. I have a 365 x torq and this made a lot of sense.
Thanks 👍
Always enjoy your videos bud awesome job
Awesome video. Tell me would it still work if you left the stock 365 air filter and intake on and just swapped out the cylinder for the larger 372? I know you wouldn't get as good of filtration but I'm just curious.
Yes, you can pretty much mix and match all top end parts from the Original edition series, the only exception is the early "square" port 365's with the open port cylinders. Chances of you running into one of those is pretty slim. But even with them, u can put on the new cylinder and carb with either the high top or low top filter/covers
I know it's a few year after but I have a question for u watched many of ur videos all the way from new Zealand very impressed with ur work . I have a 365sp it runs good starts after 4 to 5 pulls cold . But the compression comes out as 125psi cold . I have had the muffler off and piston looks great no scoring what so ever .am I missing something or is it just an old saw that needs a new ring . I have and old husqvarna 55 that feels like it has more compression under pull start than the 365sp any tips ? Many thanks
nice Canada Dry sponsorship.
i am learning lol good job.
That was cool. At the end when you were setting idle rpm there was no smoke at all with a 32:1 mix. I've been running a 50:1 mix forever and would have thought for sure your mix would have smoked. Well I guess I am wrong. Last saw I had with a 32:1 mix was an old homlite 360. Sometime if you have a chance in a vid could explain your thoughts on the pros and cons of altering the ratio. Nice vid.
+Steve Rob 32:1 ..Guess there are a few reasons, some logical and some not. I've used 32:1 on the later/better 2 stroke oils since they have formulated them in such a way as to NOT leave that black sticky goo in the exhaust. The first synthetic I used at 32:1 was BelRay H1R. The MC1, their first offering didn't burn clean enough to run that type od ratio. I ran it 40:1 and even then it left residue in the race bikes. That was a problem with the early synthetics..So reason one is when I raced motocross, it was generally accepted practice to push for those heavier ratios. The motors lasted longer and made more power. Especially at the end of races. At first we though it was because of lubricity... but later we learned that oil actually has more latent heat per unit volume burned...more energy therefore more "pop" and power. OF course there is a point of diminishing returns if there was SO much oil, the mixture couldn't burn. We also found that the motors actually initially ran a little hotter with the heavier oil ratios... counter intuitive. AND over the years when I tore down motors...it's pretty consistent that the ones with 32:1 and similar ratios had a "film" of oil in the cases and hard parts while those with 50:1 were usually dry. I liked that wet oily film on tear down .. can't say for certain it made a difference in wear, although I suspect it did.So I carried that "habit" over to my saws. And see that same oil film... So I continue. Using a non-ethanol gas and 32:1 now using the Husqvarna XP synthetic. AND when I have worked on the variety of saws...that wet & dry trend relative to ratios is consistent as it was with the race bikes.So haven't seen a reason to change and actually have seen reasons to remain as I do with 32:1
Great video Thanks
are you from new hampshire because i hear 93.3 the wolf which is a local radio station here
So 32 to 1 mix its like 8Liters os GAZ 250 ml of oil do you say Syntectic or not? Thank you.
I use the Husqvarna "Semi Synthetic" Blend at 32:1. Some of the full synthetics need to be around 40-50 as they leave residue
thats a or not
Husqvarna sangat bagus
So then the question begs, could you turn huztl saw or the g372 into an XPW?
Bob's right, looks way better with the tall filter cover!
Walt, was there ever a 52mm OEM top end offered for this family of saws? I can only find the 544254302 kit.
well done video,you have you money where you mouth is!..well explained in details!...hope you enjoy of your new 3721
Enjoy your videos. I am considering a top end upgrade for my allmost 20 year old 365 similiar to your cyclops saw. I bought the 365 originally because it had decent power and important to me very low vibration levels which husky at one time used to advertise. What are your thoughts and comparisons with regards to before and after the mod for vibration levels? Should I consider a 50mm versus the 52mm?
Just a OEM 50mm is a great saw. The top end I used was the 51.5mm "XPW" and it has a bit more grunt than the 50.. The actual cost difference isn't enough to matter. For a general all around saw the OEM 50mm it hard to beat. For hard wood and a longer bar, the XPW is probably a better choice price being equal.
I noticed some of the kits have 2 ring pistons, some one, thoughts? Was hoping to leave the original zama carb and low filter. I would open up the muffler like you suggested.
Original 371's had one ring, thats fine. tend to pick up RPM's a little quicker...although most wouldn't notice. 2 rings do seal better I guess. For most the one ring solution is fine.
Great video.
A chainsaw (the way I use them) needing a rebuild after 20 years since the last overhaul, I'd get a completely new one.
I did have a P&C + bearings done on a chainsaw just shy of 16 years because of my age & the way I care for/maintain the equipment & my body.
Thank you for a great video, I noticed the 372xpw piston is sporting 2 rings, instead of one (on the 365) Are there any differences in the rod and bearings ? and is it a good idea the trim the spru off of the rod, then shot-peen it ??
Everything is the same around the crank from 362-365-372. Same crank, same bearings, same seals. Really those OEM cranks have been reliable, so unless the plan is to spin them faster, I don't see a need to work them away from OEM stock. Good stuff.
Howdy, Great videos i must say , certainly educational, just a quick clarification, what size oem 372xpw cylinder and piston did you fit, the 51.4mm correct? as Baileys has two listings 51.4 and 50mm..
Regards Shannon
yup 50mm is the standard size.... the 51.4mm is the "xpw" larger bore.
2 inches = 50.8 mm
How much difference in bucking large red oak can be expected when upgrading a 365 to XP and Xtorq? Have you evaluated the Huztl 50mm Xtorq C&P? Did you use some 242 on the cylinder bolts or something else?
Another great vid, just getting into the 365-372 world.
Got a quick question, what were your final carb screw settings ? I'm trying to tune a 372, I think I'm close but wanna be sure I'm close to what you got.
Thanks again for the vids.
marc K not a clue. I start 1 turn out then use a tach.
Where do you start with the T (Idling adjustment) screw ?
Sorry to keep bugging you.
Work it to where the throttle is a closed as possible in conjunction with the low speed. And since that's a rather low tolerance set of parts that again varies from saw to saw. If I'm struggling with a saw, I pull the cover and wind it in until I see it just open the throttle a bit. Then work from there.
Always gotta have 99.9 kiss country on radio always from Fairview lol just recently got into saws ive used them for im not even sure how long and i like building tinkering and making more power with you on the compression but it you add more compression you'll get more rpm with that torque. In the process of build a 6.5hp Thailand outboard long tail boat engine engine is actually a kartengine well a harbor frieght predator 212 hemi welded head more compression with cam billet rod flywheel so on hopeing 22 to 24 hp with set up on stock piston
Pics or a video would be really cool on that outboard build! Might head into videos of old Mercs...another hobby. Have a MK58a from the 50's with estart and a cut down top end. AND an aluminum 14ft starcraft it will fit on. Worth a video?? Maybe...
afleetcommand possibly and yes i still getting parts gathered up before i do a video build of it and i will do a video of boat looking to push it around 35 40
Also one question what mods is esiest to the 240 38.2cc saw brand knew in box havent touched it yet
Just a muffler mod.. don't do much more..:)
afleetcommand should i take internals of muffler out? Also i had some ethanol free 93 setting outside and i think it got rained it i did use the only husqvana oil i had an tride running saw for a bit to use waswondering if just a little bit of water in the fuel will cause it to not wanna idle or it just being a knew saw needs adjusted
I know this an older video . I do enjoy watching your video's. I have looked all over trying to find out specs on a 365 special . What sets it apart from regular or x torq . Any help would be appreciated
First I think I did define the difference between the 2010 and later "X-torq" variants. and BOTH the later 365 and 372 have 50mm X-torq cylinders. The difference is about the transfer port caps. Then the "Original Edition" version of the 365/372 were both radically different that the later X-torq, but also were different from each other. The 365 "Special" had a 48mm cylinder with smaller transfers as well to pull the Power Band to a lower RPM. The 372xp Origional Edition had a 50mm cylinder and had a no -load tuning RPM at 13500, which is also 1000 RPM more than the 365 SE and 200 more than the X-torq 372's.
you should try putting a 390 carb on this saw, I hear good things but havent seen it tested.
Nah....the step from the larger squeezed down boot (a 390 boot or intake pipe) has this step that does nothing but create turbulence. Along with the lower air speed across the jets because the large bore makes it finicky...unless a lot of down stream mods have been done. I hear it all the time.
Hard to tell in the video but did you clean up the old gasket material on the case before applying the new gasket or did you just go right ontop of it? Really enjoy your videos thank you!
Get it clean, right to the metal
Hi Walter! I have a Husqvarna 365 xt chainsaw, I started having problems with it, I take out the petrol on the muffler and it stops, What do you think would be the problem?
No idea from afar, need more that that to get an understanding. What's the compression? How does it respond to the brake clean test? What does the spark plug look like? Did you try flushing the tank and using fresh fuel? the basics.
Great vids!, you inspired me to buy a older 365 used and abused, what is an acceptable cylinder pressure? how do i know if its closed or open port? only the specials are closed.. how do you tell?
+Mark Me On those saws, I shoot for 185lbs. Thats enough for a reliable work saw. Getting a stock 365 or 372 cylinder in the .020 squish rangge gets youin that PSI ball park. Open is those that have "grooves" or "slots' right in the side of the cylinder open to the piston. Closed is those with passages from the crank case up to where they open into the combustion chamber...look at that last "open port" 345 to 350 build for pics.
afleetcommand I believe he was asking how would you tell by looking at the outside of the saw, if it was open or closed port design.
I'm picking up a 365 x-torque here in the next few months and I only want to change the air filter out with the setup you have, where is the best place to find the new top cover filter and the other needed parts?
The three things you need are as follows:372xp filter holder372xp air filter372xp top cover.Best place is your local Husqvarna dealer. he may ask why.....:)Also camp out on eBay sometimes that stuff shows up for less. In fact since you really don't need them, just wait for a good deal to appear online.Also I'm certain you realize the ONLY other difference between you 365 and a 372 is the transfer port covers on the side of the cylinder. The 365 has a divider, looks like a fin on the inside of that over. Some die grinder or dremel tool work to grind that out makes that saw a 372.
I kinda picked that up from your video but I wasn't sure. I've been using saws for a long time but never did any modifications to them. Great video by the way
afleetcommand I picked up that 365 for a really good deal, $449.99 before tax brand new
I wanted know about the 51.4mm top end. Where do i purchase the cylinder? cause i can find a 51.4mm piston. Do i just get a 52mm or a 50mm I can't seem to find a 51.4mm. I'm just not familiar with building. Just getting into building. I wanted to convert a knock off Husqvarna 365. I would love to get the OEM item list you have for this conversion? Thanks I love your mentoring great channel.
Try dealers, ebay, but last year quit producing those so effectively NLA. BUT there are dealers out there who had them in stock.
@@afleetcommand Awesome! What's the best recommended conversion you'd say you have done? The other cylinder parts are cheaper if I went 50mm or 52mm? I recently watched the HyWay kit conversion. But I definitely appreciate any suggestions you may have as this will be my first build. Thank you.
Nice.😆 👍
I bought a jonsered 670 super and the dude said it was a 272 top end. I cut some wood with it it cuts faster than my 2166 and my 048 on the same log. He said it was all set up. Did he b.s. me? I don’t know a lot about saws. I work on em enough but never swapped any parts or did any porting. I used to back whene I had snowmobiles but I was big into it. Trying not to get to big into saws but kick a habit to pick up another.
Guess anything is possible, 272's were 52mm and 670's were 50mm. Also the Cylinders pulsed the carbs differently so while it something that can be done, takes being a little clever to blend a 272 top end to a 670. A 670 is about as strong as the 272 even though it had a smaller bore. BTW we call those 670/272 blends "672's", Bob has one he runs frequently
This guy had like 40 commercial logger grade saws all clean as a whistle. Thanx for the response I highly appreciate that great channel great content
Great vid, can you do this with european 365s (65cc) US 365 are 70cc?
Any of that class saw with the original edition top ends, intake plastics and carburetors 362,365,365se, 372 prior to the X-torq's ....all of them. You can also convert the X-torq versions but its a lot more expensive as you have to change out the entire intake system as well as the cylinder. That includes filter holder, intake boot and bracket, carburetor, all of it.
Not sure if you mentioned it in the video but what gasket sealer did you use and where did you get the piston ring compressor from? Thanks for sharing
Always use Three Bond 1184, nothing else. Got those ring compressors off eBay.
@@afleetcommand Big thanks for the reply - loving the chainsaw videos Thanks for taking the time to share All the best to you and your family for the festive period
New to chain saws but what is a squish test?
Is the 372 air filter/ holder actually an improvement over the 365?
yes, for performance.
Hi mate love the videos. Have you tried putting a 272xp piston on the 372xpw?
I put one in my 372xpw. It was a rocket. Compression was brill and pot timing seamed to be great. I put a video on here. Have a look. And try it. The piston slips in there fine. Just needs the piston machine to be a pop up.
+lawnmowerman1271 Sounds like an interesting concept! I've been doing popup's for 562's and the MS660 54mm's but haven't evaluated that concept yet.. thought the 272 was but didn't realize a 372xpw is a true 52mm. Something I need to check out obviously! Did a decked cylinder/popup on a Huztl 52mm kits....:) The channel will have to wait a while to see how "Red Eye" (Cyclop's successor ) looks on video... probably spring time before I can get that video built. early prognosis says its a beast..:)What is the exact bore on the XPW??
+afleetcommand I believe it's 51.4mm. Be great to see you give it a try and your verdict. I also did a dual port muffler on it with a oem exhaust. Pulls the full comp 24" bar really well.
Good morning, is the air filter conversion a must? Was thinking of doing this conversion but I’d like to keep the factory air filter cover. Thanks!
Filter conversion isn't a requirement and actually for me I prefer the low top. But the conditions around here don't require the additional filtration. Not a lot of sand or dusty conditions here
It's a preference:
Option 1 Low profile filter cover.
Makes for easy pulling through the stubs/branches as it doesn't snag as easily as the square high profile cover.
Option 2 High profile filter cover.
Air slows down as it gets filtered, the 365xp and 372xp air is filtered centrifugally, thus excludes the fine dust (in my opinion) more effectively.
Great vid. I have a question about ratios. do you think that a ratio of 40:1 of the red stihl sinthetic oil is good enough or is the more is better the case?
+Tibor Keresztes (kiskeri) One of those discussions that never ends. 40:1 with a synthetic is fine. I actually run 32:1 with a good synthetic on all my two strokes. Lots of reasons why and way to many to shorten into a simple response. 50:1 is "adequate" as proven by the manufacturers recommendations. But the simple answer is 40:1 is a good ratio. I wouldn't use more than 32:1 as there is a point of diminishing returns.. :)
+afleetcommand Thank you for the answer. Every time i see one of your videos i learn something. And learning is worth it from someone who has the knowledge. :)
What can I do to a husqvarna 55, 455, and 350 to get more power out of them?
Got some video's on the 55 and 350 to get more power. Actually both respond to compression increase. Not much u can do with a 455 other than feed it more fuel and possibly a muffler mod. Hard to increase compression on those clam shell designs without machine shop capability.
where can I find just the transfer port cover and seal for a 365 x-torq
No idea..they aren't sold separately by the dealers...maybe a junked top end?
Anyone know if this will work on a 1998 vintage Jonsered 2065? My limited research tells me it's the same saw as a Husky 365. I'm thinking it will work but not sure about the top case / plastics. I don't care if the colors don't match as long as everything fits and works nice. Also if anyone has a list of the part numbers used here that would be a huge help. Looking forward to really tearing into a saw for the first time.
Should work, same cases
just a question , is the blue coil limited , i think i heard they are and the black ones arent
yes its limited and the black ones aren't, that is correct.
My 372xp has the same filter as the 365
it came that way? Check the "tag" on the case in front of the bar oil cap and see if it is a 372. I put the low top configuration on my 372's often, yours may have been modified. Although in some markets, a low top configuration was available
I have a 365 special which I bought brand new back in 03 or 04 I believe put a lot of hours on the saw when I go to start it it will fire right up but when I go to give it throttle it just bogs out I now use a 372xp x torque so my 365 special he's just sitting no bar just a powerhead I'd like to get it back running right just as a backup I love that saw and the power to weight ratio is excellent I know it's hard to tell by not looking into it but what would your thoughts be on what is the issue with it
Put new case seals in and a new OEM 372xp top end and you will never want to use the XP - X-torq again...:) That is exactly what I did there is put an xpw top end on a clean 365 special bottom end. Lighter, smoother, and a lot more power than the X-torq.
The issue likely is the fuel line. OR carb. If its been sitting, especially with E10 fuel, there will be a white deposit in the carb that you really can't clean out. So add a new carb & boot to the top end and seals..
And fuel line
afleetcommand thanks for the advice I think I'm just going to do the XPW conversion carb filter everything I've been in the business and using chainsaws for over 30 years if I would have known then what I know now I would have kept a lot of chassis I actually have a 338xpt which I bought back in 2001 I had to retire it yesterday because the metal finally ate through so bad that the gear for the Oilers now exposed and won't oil imagine getting that many years use out of a saw with only replacing pull cord and spark plugs nothing else
i just did this build now i have timing issues i keep spinning my flyweel i made my own key it keeps snaping them
26 ft lbs
@@afleetcommand i gotcha i did rachet tight
thank you
Great video as usual! What would you estimate the total cost of that build is?
gbhntr Probably under $350 in parts then your time to stick it together. I found an ebay listing for 285 for the top end kit. Then the plastic cover, filter holder, and filter....eBay is one place to look. I get all my OEM parts from Bob at Ashokan Turf and Timber
3144 RT 28
SHOKAN, NY 12481
(845) 657-6395
Hey, is there a way I can retro fit and modify my old rototiller in to a Apache Attach Helicopter?? What parts would I need?
Nice video of conversion. I have a 365 special which am happy with the amount of power and reliability. My question i have is about balancing. The 372 piston has significantly more weight, and the crankshaft/flywheel would be balanced for the standard 48mm piston. Do you think the saw vibrates more now than in stock configuration?
+Al Langaman Not really...and it is the same crank BTW. One project that is "In Process" is tweaking a 48mm 365 to match a stock 372..:)
At 12:54 you talk about the carb screws. What can happen if you over tighten them?
justlivin the saw can run lean if over tightened
Travis is correct as it will flex the mounting bracket breaking the seal. Actually a common issue on those.
Ok, it had me curious. I just replaced the carb on my old 365, and am notorious for over tightening things. The saw runs great for a right good while, but later begins to die. I can keep it running by finessing the choke (or let it set a while), then it clears up. I think this is what some people call "going lean in the cut"?
yup. sort it out before u waste a top end!
But then i'd have an excuse to go all big bore cyclops on it ;-) So you think the boot seal may be this issue, and not something with the impulse tube? I could've sworn I replaced that boot, but cannot find evidence that I ever bought one. I remember the old one looked good. Maybe I should replace it anyway, and check the pulse tube while i'm back in there. Thanks for the advice, and the great videos!
Will the 2171 take the 372xp top for the larger filter?
Cases are the same so if you have the right filter holder it should fit with the hi top plastic. Don't thing the different tank/handle and handle & chain brake guard would interfere. Never went that direction .. I always go to the low top configuration.
Explain the term oem please
Original Equipment Manufacturer
@@afleetcommand silly me
Wanted to buy some Nike boots yesterday. The only way I knew they were fake was because I had the original. (Too many el cheepo differences.)
Fake oEM = other Equipment Manufacturer.
Many just in time Manufacturers outsource their parts.
The fakes are those that geared themselves up for, but didn't get the tender.
Truth be told, sell them to the public in any case to defray expenses (or may even be a better product) in the beginning,
but because it's lucrative, may Not stop.
did 372 ever have a square intake
No but the 365 did. And that was on the same platform. SO it's possible some one might wrap 372 things on an old 365 chassis. The 365's went to the same intake as the 372's over time and with the x-torqs even the same carb and cylinder,
@@afleetcommand ok nice i just been working on 365and 268 ////// can we put a 394 cylinder on a 181 38mm stroke
where to get the muffler?
eBay
Apa gak pakai gasket cyl block?
Depends on what the squish measurement is. Id with a gasket it is in the .040inch range removing the base gasket brings you to approx. .020inch, that is a good number. Anything less than .018inch squish is not good. ( Squish = distance at top dead center from piston crown to squish band in the combustion chamber )
Tergantung pada apa ukuran squish itu. Id dengan paking ada di kisaran 1,016 mm melepas paking dasar membawa Anda ke sekitar. 0,508 mm, itu angka yang bagus. Apa pun yang kurang dari 0,457 mm squish tidak baik. (Squish = jarak di tengah mati atas dari mahkota piston ke squish band di ruang bakar)
have a 2166 can it be converted to a 2172?
yup. everything is identical on both saws with the exception of the caps over the transfer ports. The 2166 has a divider cast into that cap and the 2172 doesn't. That's it. Either get a used 2172/372 cylinder or better yet take off those caps and grind out those dividers. Same piston, crank, cylinder casting (just the caps different), carb intake cases everything
afleetcommand its brand new, took the exhaust out an theres still crosshatch in the cylinder. i plan on using it for milling so when ill get down on compression, ill swap it over with new cyl and piston from a 2172
LOL Can I send you a 365 special to do this to?
The idea is YOU can do that, just eBay the parts and spend an afternoon. My shop policy is if the saw doesn't come in the front door attracted to a person, I don't want to work on it. Not set up to deal with shipping and the postal service or UPS...:)
How much did you make from Canada Dry? Lol