In my motocross days we would install those little screens in our airboxs because they made a performance difference you could really feel...

Harvey it's a Partner F55A a Swedish saw in the Electrolux Husqvarna era mid 70's by my guess. Partner and Jonsered were a lot alike made in the same factory separate from Husqvarna but the Partners are very stihl like with a small bore and long stroke. And yes most of those style models have the gas and oil on the chain side. I had two Partner 7000 plus models the same way but 70cc and my guess was it was to force ya to sit down and fill the saw because it fits great on your lap between your knees sitting down to fill it. They work great like a 272XP or an 044, ended up giving them to my logging mentor who started running Partners back in the 80s and still doing it until this day.

IRONHORSE your channel is very exciting:) Bless you for sharing your life and wisdom with us:)

Hello 👋 .... watching while I grade the dirt roads in my county grader!

Ironhorse your idea of adding those vents in is genius. You’ve done nothing but aid in the cooling off of your saw. Great idea..

Hi everyone hope everyone is having a blessed day

Thank you iron horse, pretty interesting topic. Was wondering it putting colored chalk inside the air box would help us see more. Sorry if someone already mentioned it but maybe a thought. Anyways thank you sir, god bless you

Hey Uncle Harvey if your looking into cams do yourself a favor. Look into Isky Cams in California they have been in business for a long time. They started next to eldebrock . I bet Cullen and IronHorse will have a great time drag racing !!!!

The F55a is a partner chainsaw! But, I looked it up lol 😆 There was a cool video here on utube harvy 😊 about the history of it!

Looks 2 be a Partner saw

That’s an ol partner. My late father had one when I was little. It was his first saw. I remember the oil plug all roughed up from years of using a screwdriver to open it. The cover on yours has faded his was more yellow.

I wasn't much of a husqvarna guy been I Stihl guy my whole life till I found you and tinman now I really like husqvarna especially the 372s and 272s

Was just Gannin to say colour coded buttons point to partner but rest of partner were yellow,well before my time oh well great videos and good luck wi the health get well soon cheers big ears and thanx for very njoiable and informative vids 👍👍👍

I live in the cascade mountain range and the saw shops have been adding screened vents for decades. It's mostly for logging in hot weather.

Gotta watch them East and West Coast Dawgs ..them homies will cut you if you aren't careful !

I’m no saw builder but I’m excited about this journey you’ve invited us on !

Love your videos Harvey greetings grom europe

Can't wait to see what you do with that big block, thanks for the video harvy . Keep em coming

Hey Harvey that Saw is a Partner made in Sweden.

It's nice to watch a master in his craft. I been in construction for 30 plus years. I can build all kinds of things. I took apart a Stihl ms290 to change the head and cylinder to a ms390. Now I have a pile of pieces because I can't figure out how to put it back together...hahaha oh well. Some things are best left for the pros. I enjoy your videos. Thank you for sharing your knowledge. Be well 👍

great to see you Harvey, I just watched the last 2 videos. its all good stuff!! I don't fully understand about port timing so the other mod ideas are awesome 👌 always interesting to hear about your drag racing engines aswell. thanks as always, love your videos 🌞🤯😄

i really enjoy your vids harvey have for some time now sharing your knowledge of these saws is appreciated sir!

Minimal investment maximum enjoyment. Words to live by buddy

Harvey!! Happy new years to you an your family, looks like all is well up there in your neck of the woods. Man I look so forward to seeing your videos when they post. I admire you in this stuff, just go out to the shop an tinker with saws! Rob this from that to make something outta nothing. I've learned a lot, l mean A LOT over the years of watching you an your videos. It's not all about having the best of the best tools, shop, parts, etc. That's what I like the most, use what ya got, only purchase or trade for what you need. Keep up the good work Harv, I know I sure do enjoy watching your stuff. My wife on other hand, not so much haha! Spend my time on KZread at night just before bed, she has went as far as buying me earbuds so she don't have to hear it!

Mystery power saw looks pretty stout! Nice haul!

Ur combo sounds great on the drag engine sir love it!!! Fun times to come😁😁😁😁🙏❤🙏

Hey Iron Horse, Jonathan Hensley here first things first. I love your content I like it when a new video pops up. You ask if people might share their thoughts on Husqvarna’s air injection system I have spent some time at the Husqvarna lab in Charlotte North Carolina in the past, and knows several of those guys. My understanding of the air injection system, and how it works is the following, the fly wheel fan. Stacks air into the semi sealed air box. The carburetor is vacuuming, the air out as it goes in. The RPM of the Saul dictates how much air is pushed in while simultaneously. The piston at the same rpm, is vacuuming, the air out creating a balance flow. The air injection also mitigates debris from the airbox via the cyclone effect meaning the heavier particles stay to the outside, and the air is picked up just inside the Vortx. However, with all of that being said what we have to consider is when you port a chainsaw and open up the exhaust, you’re moving more air than the engineers designed the air injection to move in affect, the vacuum is greater in a ported saw through the carburetor, then the air being stacked in the airbox, so I do think there’s validity to adding some extra air. For the air injection to truly be balanced with the port work, you would have to know how much more vacuum is being drawled on the airbox with a ported saw, and try to open up the air injection port into the airbox to match. hope that makes sense. Sincerely would love to talk to you on the phone about it sometime I could shoot you an email. If you’re interested we could share information maybe chat about it some keep up the good work.

@theironhorse6600

Жыл бұрын

Exactly! Ironhorsechainsaw@gmail.com. Leave yer number and best time to call! I’m east coast

Nice partner Ironhorse ! The johnsereds twisted sisters haha

Thanks for the air vent demonstration Harvey, I could see what I needed to see.

I don't know if you're talking about me saying there was pressure into the carb but that's not what I was saying. I was talking about the air box only being positively charged with a slight amount of pressure. You actually proved this in your test showing that air escapes through the vents. If no pressure was present, there would be no flow. All that aside, interesting results and more or less what I was expecting. I wonder if you held your fiber strands in front of the hole for the idle adjustment if the large vents create suction by providing a path of less resistance for the air. Thank for the testing and constructive discussion.

@ScrewdriverTUNING

Жыл бұрын

Holes in the air box alone can not overcome the pressure of a fan unless the engine is sucking all the air from the fan. I noticed air being sucked in the holes on mine in summer when i was heavy in the cut. I put a pre filter material over the holes and noticed it was catching fines from the outside any other time the pre filter will catch fines from with in the air box. I am not a fan of dyno testing but this would be a good test for the dyno IMO

@thomasmcpherson7584

Жыл бұрын

I was thinking that same thing. I thought that without the vents you are forcing the air through the small openings. I think the vents will help move more air through the saw cover. Just thinkin. Less restrictive air box will move more air. I bet it would keep the filter cleaner too

@jcsawshop

Жыл бұрын

@@ScrewdriverTUNING It definitely would. It's an interesting topic for sure. I'm still subscribing to the theory that the air injection is designed to create a pressurized air box, albeit very minimal. This will force air out of any gap/hole in the filter cover thus preventing fines from being sucked in. To me, the fact that introducing these openings creates noticeable air flow from them is absolute proof that if that air was not given an escape path (vents), it would have no adequeate exit and positive pressure would result within the air box. At the moment I can't think of an arguemtent against this. Am I missing something? If however, performace gains were proven, I would say it's an upgrade provided the filtration was still adequate.

@jcsawshop

Жыл бұрын

@@thomasmcpherson7584 I was thinking with the introduction of the 2 large vents it was possible that it could create suction on the small holes. If so, does anything that gets ingested just go right out the vents? Does it get trapped and create a dirtier air box? I'm not sure. Nick, who introduced this product, is sending me some. I will definitely be exploring some of these questions but in the meantime be following along here with Harvey and you all.

@thomasmcpherson7584

Жыл бұрын

I was thinking you could tap a hole and mount a barbed hose. Attach that to a manometer and rear inch’s of water. I use manometers as work often, thought it would be an easy way to measure fine pressure changes. Could measure pressure with and without the vents during idle and WOT. The manometer would simply show positive or negative pressure in inches of water. Then you’d know. I don’t think there’s a right or wrong here. I think that it probably has benefits and might have negatives too. Always worth learning and testing.

Excited from title! Love ya brother

I love your mod with the screens! Makes perfect sense!

Brilliant video thank you

Interesting video, thanks Harvey.

I was running Husky when the air injection came out. Always pulled them and added screens. This was in 254, 262 days. Filters ran clean and stopped sending snow to the filter.For me it was a gain.

Looks like a partner saw. Swedish i believe. Toaster style. Some of them piped exhaust into the handle bar for a heated bar.

Good video Paul. Years ago people take screen and wood burn iron and put vents in husqvarna 2100 to help them breath and they work a little better.

Your guruness has no boundaries Harvey

You convinced me Harv... I like it

I’m thinking that your mod with the vents in the air cover is a brilliant idea. Clean out the air box and filter run it for a day and see what’s in there after that for fines. I think there will be a substantial loss of fines. 😎👍

I think If there’s enough moisture in the air to get in those screens for rust purposes then the flywheel pressure port will do the same thing. Holes in a husky works great and when it’s hot out and your deep in the cut is the only time I noticed air getting sucked into the holes I put in mine.

@majorpixchannel7146

Жыл бұрын

Well said 👏 👌

@ScrewdriverTUNING

Жыл бұрын

@@majorpixchannel7146 🙏

Harvey, looks like your having a good time in the saw shop today.

Hey there Mr.Ironhorse. I looked that saw up and found out it is a 55cc Partner. I guess they are a Swedish saw. Hope this helps!!

Thanks for putting it out there Harv. Getting tired of it and I'm gathering up old saws left and right. I have 340 bucks in an 028 super build and man that little limber runs awesome and I know what I have. Keep it up buddy. God Bless.

@theironhorse6600

Жыл бұрын

Right on

great video harv!! that F55a might be an old 55cc partner!

the vent idea is a winner for me. Jonsered used the air horn delivery off the flywheel to the air box as a sales gig, called it "Turbo". Concept seems to have been aiming to deliver presumably less saw dust contaminated air from the off side of the saw and I suspect more than that it was to encourage a positive pressure in the air box which would tend to limit sawdust intrusion. Ya know if we could actually seal up the air box then we would be on the track for a Turbo charging set up...kind of intriguing! I doubt that fines are going to exit/pass thru the screens, mostly expect them to impinge due to the turbulence of air passing through the screen structure. But I think the vents will promote a better two way air flow while still working toward the positive pressure concept. Lower speed the air flow creates cooling, at higher speeds the combination or the flywheel generated airflow AND the passive air through the vents I suspect will do a better job of feeding the intake volume which is quite high at increased RPM. Can't for the life of me see where excess water or other debris would go through the screens into the box. No matter if it did, the small amount of water is not going to be a show stopper for any ignition components and fines we really don't worry about...that is what the air filter is for. Do an end of the day clean up with a dry paint brush and a hearty mouth blow and you are good to go. I am with you of being totally fed up with the Cult following of genuine Husky stuff, insane prices for pure crap most of the time. I have already gone a new direction like you, bought 372xp and 288xp farmertech saws, will tear them completely down and rebuild with OEM and aftermarket parts where I feel needed. Presently with the new saw, new aftermarket crank assembly, cylinder and piston, oil pump, ignition coil, a Walbro H6 used carb and seals, gaskets and misc other upgrades I am going to be into the 372 for about $700. Already have this stuff laid in from Wolf Creek and other shops.That is a bit more than half the price of a new 372 and I get to custom build it the way I want so I KNOW what I have. Works for me!

Awesome concept! I like it!

Great video

Wow Harv those carcasses are very clean compared to the ones I got from house

I think it's a good idea. Only thing I would change is mount them lower incase of water or anything like that coming down cover.

I hear you man , any of the 2 or 3 series 50 cc and up used husqvarna saws in my area are going up in price every day. The clone saw parts are getting better and better all the time . As long as the customer knows what they are getting and are good with that why not use the proven parts. It's to bad the carbs and crankshaft aren't better quality . The price for oem parts here in Ontario Canada is crazy, so if you're willing to wait a bit for the parts I'm all in . Just my opinion. Stay healthy Ironhorse , Cheers.

That is a pioneer and yes that's absolutely is the bar oil I got 2 of those love ur videos buddy

@theironhorse6600

Жыл бұрын

Cool, thanks

Im doing a 365 to 372 conversion now..I always find the 365s in good shape..all the loggers killed the 372s around here..I do like idea of a 400 dollar saw that could go logging..this rain sucks 👍👍

LS6 oooo boy, best of the best

Thanks 👍💯

Love your videos, watched several a few times over, making sure I don't miss anything. Finally got my little shop set up, new pencil grinder coming. New piston coming for my 440 (460 big bore, ported) I'm going to do some piston dressing, cleaning, lightning, ECT Question? My dream saw is a 090, saw Mill. Is it possible to layer a bead of aluminum, build up a support web for the wrist pin (attempt to build a 090 piston become a ported piston??)

That looks like a partner to me. I haven't had one but I have seen them on eBay.

My thought on the air horn is to move air around the carb to keep it cooler on extremely hot days. I don't know jack about these saws but it seems like a good place to have a vapor lock condition with the carb that close to the engine.

The yellow lacquer beauty is a Flymo Partner s55, potentially marketed different overseas etc. I have one here they are good looking saws.

That is Definately a 55 cc Partner Farmsaw,,,,,

Looks like a partner

The fly wheel isn't exactly a turbo charger but I always like to think of it in that way for saws that have air injection. Air vents for air injected saws maybe a bad idea. Of coarse actual tests would need to be done. My thinken is that the air injection forces air (like a turbo charger) into the carb rather than sucking air. With vents that air is pushed out as you showed with your test. When I was younger on a crew with all stihls and no air injected saws in sight we had to run our saws without the tops. Venting was a god send for them saws.

GOOD MAN HARV! GOOD MAN!

screens seem like a good idea wonder if theres a way to do a temperature test with screen and no screens see if theres a difference

Sure looks like a partner

That there is a Partner. My dad had one 40 years ago and it was the first saw I ever used! I remember the red and blue knobs.

Looks like a partner saw

Im pretty sure that is a partner

Harvey I was completely wondering if all this would work 372s are scary worn-out. I've waited to build one thank you time for parts.

This is great lol, I just got 2 carcasses of a 385 a few days ago and finally got all cleaned up , mixing some parts from both with new aftermarket parts I'll have a running saw, awesome vid Harv but I have a question for you, one came with a blue coil and one black, would the black be unlimited thanks for all you do for us 👍

@theironhorse6600

Жыл бұрын

Black is unlimited!

Found a 65A (that a big saw around here)that runs now to find the antivibe bushings.

It looks very similar to a Partner K650 disc saw Harvey..

👍🆙Harvey

@theironhorse6600

Жыл бұрын

Hey Darin!

Fantastic video. Can you share the part numbers for the components needed to swap from high back to low back on the 372xp?

hi harv it looks like a partner s50

Hi everyone ☺ 😊 Snowing 🌨 and windy day here 😑 😒 got to go finish pulling the power steering pump off my truck today 😑 😒 😐

WHAT ABOUT; taking a cylinder, bore it out to just BARELY being able to accept the mounting screws to the case, THEN pressing in an iron cylinder that you can hone (bore) to 375 dimensions and then do whatever you want to with it. Maybe take an ole Xtork cylinder for doing that, reworking it to YOUR pleasure with lots of JBWELD for the cylinder and then you’ll be able to take advantage of the bigger carb, bigger intake port, and THEN you’ll be able to do with the intake and do what you will. Build it up with a removable head, and increasing compression should be “relatively” easy to do. It’ll be fairly costly but a man can dream!!

@theironhorse6600

Жыл бұрын

I have 56mm and 58mm cylinders here that I had sleeved for 372 saws!

good old partner saw they ran sweet

@theironhorse6600

Жыл бұрын

I had never seen one before! It has great compression and spark! It will run!

@plaprentice

Жыл бұрын

@@theironhorse6600 Hi sir, id like to send you a video of my one running, its been in local forestry harvesting in the 80s. You guys get more parts across the water. Cheers

Partner of some sort for the saw.

In my opinion its better than running a velocity stack with an exposed filter. I think itll make differences. I kinda think it looks snotty with those screens on the filter.

Looks like a "Partner Farmsaw F55?a?" Classic Vintage 55cc Swedish. There is a video on this site.

Partner saw...swed made..don't know much about them other than it was a 70's saw a quite nicely made to be honest from what I've seen

Swedish. Electrolux bought them out. They were quirky, but ahead of their time. They are what put Husqvarna on top. Technology acquisition.

If you look at sleds (snowmobiles)They have vets all over the place. Air flow is a the key. Get the heat out and keep fresh air moving. I’m not seeing much downside of venting.

The fact that the vents allow air to flow makes sense to me the intake would have cooler air available for the engine. I would be curious to know if there was temperature difference underneath the cover with vents vs no vents. Cooler intake charge makes more power.

its a partner saw lots of them used in ireland years ago

I bet that f55 is a Canadian built saw with the fuel and bar oil fill placements

Thats a partner 50 cc excellent saw harvey for their time shit they still cut with the new saws

The F55a is a Partner. 55cc made in Sweden

need to be compared on the dyno..... you might just be lowering the airflow going through the carb... who knows for sure?

I believe that saw is a Partner like a p55 A 55 cc saw.

Would there be any benefit in sealing air box to actually create pressure?

What top ends are you using?

Do you think the Hsuqvarna air would be good for any make saw?

I figure about 3 junkers to make a good un - I’ve got OEM 044 and 272xp carcasses galore! IF ya get em on the cheep ya come out Waaaay ahead in parts - just gotta be careful about buying off ebay though , some real beauties out there - once bit twice shy 😉. I ask the guy to pull the muffler and show the piston/cylinder (I don’t know why this isn’t SOP from jump street) and if they balk then me and my $$$ say bye-bye. I’ve got some turnkey runners on the cheep and also a few lemons 🍋 so I’d say it’s a crapshoot.

@theironhorse6600

Жыл бұрын

Well said! Buyer beware!

@fabzacres-blackcat

Жыл бұрын

@@theironhorse6600 I agree ☝️… have gotten one where someone tried to “drill out “ the seal and boogered up case (probably with idea of trying to get a screw in there to pull out the seal) but never seen one where someone welded the crank like that! It’s amazing what ya see once ya get deep in the bowels of some of these saws - head scratchers Fo sure !

@theironhorse6600

Жыл бұрын

I have seen some amazing butchery over the years! Most of it was harder than fixing it right!

feel like the screens would blow chips in my face, i wanna run one and see

Does jred turbo parts bolt up to husky? Might make a bit more air....

this isintresting with those screens,a think your right about them.

hi, that f55a saw its a partner saw.

Looks like an old partner saw to me