When someone has a love for tools and owns alot of different types of it he develops a sense and when looks at a tool in a shop with out even running or have used it before knows if its built good or not almost. Great knowledge of saws there ❤
Just bought a real nice good condition 61 with a knackered pot and piston super exited for your video on that one also bought a Ebay 272 top end and carb hopefully won't regret it.
Great video I always wanted to know what you did to the muffler thanks. Also love the xmas decor. Keep up the hard work. It’s awesome watching the channel grow.
i miss my old 61. my neighbor got sick and wants to sell me his chainsaws a makita 7300 makita 6100 and a makita 5600 and 2 sachs dolmars. after seeing your videos i think i will take them he is giving me a great deal
Your definitely good at making them run. Always have sweet one to show us.weather been lousy here snow melting turning to pudding.trying get logs out no fun.lol
I just got one of those makita dolmar chainsaw. Thanks for the honest information about different chainsaws. You know that those tree hugging retards don't know how engines are supposed to run. So. They put funny plumbing parts in the way of making an engine working good
closertothetruth yeppers ! It’s also the truth imho ... some builders saws run too hot and lose performance after hard running ... gotta remember this is an Air-Cooled engine and it can lose up to 10% + if “made” to run ... too hot via excessive compression
Harvey.. You and the shop are looking solid as a rock. Your on a strong roll bossman. Thank you for shining the light and showing the way down the path of giving. IRONHORSE!!!
Hi Harvey, as always a great video today. Last night I was looking at one of your first videos, and your weight loss now is really apparent, what a difference, your doing fantastically well, keep up the great work pal. 👍🏴😁
You can heat up the crimp and roll it back and split that muffler right open. It's not brazed together like many of the husky mufflers. I've done several of them, no cutting of the can required. You can't even tell they have been opened up afterword. Have a good one Harvey!
Do all the Dolkita mufflers have that tube that goes into the exhaust port? I was looking for one to put on my 7301 and I've seen some OEM ones on ebay that look like they don't have it, they're all pretty expensive
@@CSkwirl no, that little pipe is the SLR version of the 7910 muffler. Some of them are catted mufflers also. Yes they are pretty pricey, about 90 bucks new.
@@CSkwirl No they don't, the early ones without the extra bracket on the front did not have them. The bummer is the new makitas don't have the bracket and you may confuse them with the old ones. The 7301's are great saws BTW, that's going from a guy with a bunch of 7900/7910's bot stock and ported :). Edit: I forgot to add that unless your saw is ported you may see a loss in power running long bars with a muffler mod on these saws, even ported the most they need unless its a real wild port job is opened up under the stock deflector and removing the "SLR" from the muffler.
@@brettblack7049 Thanks, what was confusing was that ones looked at on ebay says it fits all 6400 73xx and 79xx etc, some had the extra parts and some didn't. I've had mine a year and not used it that much, I didn't want to mod the muffler without having a spare in case it made it worse, which as you said might be the case. It's stock so far so maybe I'll just open up the hole a bit
I watched a video in which The Ironhorse seemed to be experimenting with upgrading the top end of a Dolkita 7900. As I recall, Harvey was thinking about the 7900 and couldn't sleep until he compared the Dolkita top end to a bigger jug that he had in the shop. The gist was that he thought, with a bit of machining, that the bigger top end would turn the 7900 into a mega beast! I can't find the update for that video. Does anyone know if Harvey ended up having success with the "bigger" top end?
They're supposed to be a 79cc saw. The old cat mufflers didn't have the inserts it was just a cat stuck between the two halves of the shell. On my two saws I just ground the crimp off the whole outside. Pulled the cat out, opened up the holes a little bit then stick welded the shell back together.
Yeppers , lotsa “forum boys” cuttin the flywheel key way to advance the timing ... I prefer Harvey slogan of “we don’t make them run, we let them run!l
I’d take the info gleaned in these “chainsaw forums” with a grain of salt ... some of these gents got NO CLUE on how to build a WORK SAW that cuts with the quicknesss and more importantly LASTS LONG TIME !!!
Ironhorse, that's a beautiful 7900, looks great through your lens! Of course the Husqvarna is nice! I see you have a Fiskars X27 near the door, is that yours or your son's? I know Erik brought one before to your property. It rubbed off didn't it? I bought one last year in the winter. I like the Fiskars X27 splitting axe over a traditional maul any day of the week! I just keep the maul around because it doubles as a sledgehammer. I still love old hickory over synthetic though. I hope you keep in touch with Mr. Jeremy Bell too, he's another chainsaw prodigy.
Richard Sullivan The maul is 33% heavier than the axe ... I like it better ; more force per swing ; the isocore handle delivers less vibration to the hands , and the other end can be used for driving stakes, wedges ... here’s a video of me busting up some red oak 23” rounds with it ... will the axe do the job ? Sure but swing for swing the maul is superior imho ...... czcams.com/video/gyUCKkQ5zDo/video.html
Hello, very good video!! A few days ago I bought a new PS421 and I want to remove the catalytic converter. I am going to buy another muffler and leave the current one unchanged, because I want to have it as a spare in case there is any problem with the guarantee, to leave the saw as I bought it. I have a couple of doubts. My new stock PS421 runs at 11000rpm at top speed, the mix is pretty rich. Is it possible to eliminate the catalyst and have the saw run well without having to regulate richer the high speed screw of the carburetor ? Since a special tool is needed, and the warranty is lost by doing so. The other doubt is that in the exploded view manual, there are 2 different mufflers, one with a catalytic converter (serial number 195 174 550) and the other without it (serial number 195 174 500). Are They compatible? Can I buy the one without a catalyst directly, or do I need to buy the one with the catalyst and drill out the welded spots to remove it? Thank you very much, I subscribe to your channel.
@@theironhorse6600 Thank you very much! The high speed screw can be modified with a double D screwdriver, right? I say this to buy one in case I need it. Can both mufflers be interchanged? I thought not, since in the exploded view manual they have some parts with different serial numbers (joint and connecting link), while in others it is the same. Is it possible to make a mix between both mufflers? Leave the current rear half part (the one that goes to the cylinder, serial number 195 174 550), remove the catalytic converter and place the other front half part of the other muffler (195 174 500)? Will the mixture of both fit well? If so, it is much easier! Thank you very much!!
Sorry for my english: The SLR pipe increases efficiency. Scavenging losses and burned gas bleeds the SLR back. Because of a higher amount of recirculated exhaust gas the ignition module is totally different. The timing is much earlier because the extra portion of burned gas reduces the speed of the reaction in the combustion chamber. The earlier timing compensates this. If you remove the SLR you will create horrible unused pressure to the piston, rod, bearings etc.. Unused because the pressurepeak is too early. Result is: much more fuel consumption, extreme high poision emissions, very short lifetime of the engine parts, too lean AF at higher speed (or too rich at lower speed, if you play with the carb. But you will never find a good setting. The SLR engine has a different carb). And ok you will get roughly 5% more peak power (by doubling internal pressure), because the SLR is a small restriction. So, it is a bad idea to remove the SLR.
@@jaydee2620 Hi Jay, I think you have not the equipment to investigate this. Sorry. You need a power breake, a massflow meter for fuel and an exhaust gas analyser for CH, CO, CO2 ,NOx and O2. And a real time pressure indication system to know what you do. And many engines for test series. I was an engineer in the development team of this engine. Belive me you are not right and you are risking health for you and everyone who make the same modification because of the much more poisson exhaust you create. This engine can reach more than 1000 hrs without problems, but please dont make any blind modification. Regards.
Can't believe that was in the Dolmar muffler. That Husky sounds strong.. my friend left a red rag in a V8 engine once. Looked like cotton candy coming out of the exhaust. Very expensive drag engine ruined 😵
There's a "Bus Grease Monkey" video where he sucked a red rag in through the supercharger on the Detroit 2 stroke on his bus, which was parked with the exhaust facing to his wifes BMW. The car door was open and pieces of burning rag were spewed all into the car!!
Hey new sub here from bucking channel I have a 371xp that I want bored I was wondering how I’d contact you for that? Edit: the term I see is called walkerized
Man??? I want that 268, im sittin here droolin over it!!!! id rather have that saw/?? than @ woman, does that make me sick?/ HuMMM?? 0 well, so it be..... make a old man Happy Andy... sell it to B.....Please???
Man that muffler is large enough to cook a pot of soup in! 🤣 That stupid kidney pipe in that muffler was part of their response to the emissions stuff. They didnt have that when the first came out with the 7900 under the Dolmar name. Then they changed it to a 7910 and had that weird pipe in them. Then they changed the name to Makita. Nice stuff, keep it up.
Oh isn’t the epa wonderful ? A pnw forest fire will spew more “pollution” in the air than 1billion chainsaws running for 8 hrs a day for 10000 years ! 😁
When someone has a love for tools and owns alot of different types of it he develops a sense and when looks at a tool in a shop with out even running or have used it before knows if its built good or not almost. Great knowledge of saws there ❤
Just bought a real nice good condition 61 with a knackered pot and piston super exited for your video on that one also bought a Ebay 272 top end and carb hopefully won't regret it.
Shop is looking good Harv. Lighting is great! Keep up the good word.
Great video I always wanted to know what you did to the muffler thanks. Also love the xmas decor. Keep up the hard work. It’s awesome watching the channel grow.
Love it Ironhorse saw sounds pretty snappy and great. 🌲❤🌲
Love the camera shake with the saws running on the bench ... whole lotta shakin' goin' on!
i miss my old 61. my neighbor got sick and wants to sell me his chainsaws a makita 7300 makita 6100 and a makita 5600 and 2 sachs dolmars. after seeing your videos i think i will take them he is giving me a great deal
thanks for video!...Merry Christmas!
well aren't you festive !!! mammy reality digs them lights !!! i gotta get my 372 up to ya , been so freekin busy !!!! great vid harvey !!!
I wish you had a video of the masterpiece running after you were done. Getting my brand new 7900 today.
Your definitely good at making them run. Always have sweet one to show us.weather been lousy here snow melting turning to pudding.trying get logs out no fun.lol
Sounds great Ironhorse appreciate ya 👍👍👍
Sounds good Harvey. Where’s the elf lol. Thanks for another great video. 👍✊
I’m glad the saw made it to you, Harvey, so excited to see this build! 😁
Howdy, Robert! I'm in Sheboygan - where are you at?👍✌👍
I just got one of those makita dolmar chainsaw. Thanks for the honest information about different chainsaws. You know that those tree hugging retards don't know how engines are supposed to run. So. They put funny plumbing parts in the way of making an engine working good
Jolkrae Remeark Dodgeville Wi area 👍
I started it last night and bounces all over the floor
We don’t “make” saws run ... we “let “ em run ... sweet Harvey, that’s a slogan on a t-shirt 😆
it would be a good add for the business
closertothetruth yeppers ! It’s also the truth imho ... some builders saws run too hot and lose performance after hard running ... gotta remember this is an Air-Cooled engine and it can lose up to 10% + if “made” to run ... too hot via excessive compression
SHE SOUNDS AWESOME BUDDY HOPE YOUR DOIN WELL IRONHORSE
Great video Harvey
Nice to see you got a saw in from a fellow sconnie! Trying to decide wether to build my 266xp or sell and roll mny into a 372 non xtorq
Harvey.. You and the shop are looking solid as a rock. Your on a strong roll bossman. Thank you for shining the light and showing the way down the path of giving.
IRONHORSE!!!
Hi Harvey, as always a great video today.
Last night I was looking at one of your first videos, and your weight loss now is really apparent, what a difference, your doing fantastically well, keep up the great work pal. 👍🏴😁
Good video buddy 👍 more useful info.i try to suck up all the info from masters like you
You can heat up the crimp and roll it back and split that muffler right open. It's not brazed together like many of the husky mufflers. I've done several of them, no cutting of the can required. You can't even tell they have been opened up afterword. Have a good one Harvey!
Yeppers.
Do all the Dolkita mufflers have that tube that goes into the exhaust port? I was looking for one to put on my 7301 and I've seen some OEM ones on ebay that look like they don't have it, they're all pretty expensive
@@CSkwirl no, that little pipe is the SLR version of the 7910 muffler. Some of them are catted mufflers also. Yes they are pretty pricey, about 90 bucks new.
@@CSkwirl No they don't, the early ones without the extra bracket on the front did not have them. The bummer is the new makitas don't have the bracket and you may confuse them with the old ones.
The 7301's are great saws BTW, that's going from a guy with a bunch of 7900/7910's bot stock and ported :).
Edit: I forgot to add that unless your saw is ported you may see a loss in power running long bars with a muffler mod on these saws, even ported the most they need unless its a real wild port job is opened up under the stock deflector and removing the "SLR" from the muffler.
@@brettblack7049 Thanks, what was confusing was that ones looked at on ebay says it fits all 6400 73xx and 79xx etc, some had the extra parts and some didn't. I've had mine a year and not used it that much, I didn't want to mod the muffler without having a spare in case it made it worse, which as you said might be the case. It's stock so far so maybe I'll just open up the hole a bit
Missed the saw build stuff Harv!
You are getting a lot of chainsaws.. I need to get mine to you thanks for the video mr. Harvey
Ironhorse i just recently found a nut u underneath the piston on a husqvarna 36. It was from the outer white plastic peice in front of the carburetor!
u Da Man..... Man!!!!! love ya!!!!
Was hoping to have you talk about that Dolmar cylinder Harvey
good to hear that guys in hot climates open up mufflers to reduce heat , i too live in a hot climate , nothing to see 110f with 80f minimums
Does it make sense to convert the dolmar exhaust? Or stay factory? Is there a difference between the two?
well with the muffler mod and massage on the ports 80 odd cc the chips will fly
Man Ironhorse tell us some more old stories about the old saw mill property.
I watched a video in which The Ironhorse seemed to be experimenting with upgrading the top end of a Dolkita 7900. As I recall, Harvey was thinking about the 7900 and couldn't sleep until he compared the Dolkita top end to a bigger jug that he had in the shop. The gist was that he thought, with a bit of machining, that the bigger top end would turn the 7900 into a mega beast! I can't find the update for that video. Does anyone know if Harvey ended up having success with the "bigger" top end?
You heat up that crimp and pry it open, you can the crip it back closed once the work is done.
lmao @ lil Turd.... u crack me up!!! hahahaha
'
They're supposed to be a 79cc saw. The old cat mufflers didn't have the inserts it was just a cat stuck between the two halves of the shell. On my two saws I just ground the crimp off the whole outside. Pulled the cat out, opened up the holes a little bit then stick welded the shell back together.
Manufacturers: "Engines are air pumps and we can't have them going too strong so lets restrict airflow". Very nice and thanks for showing the guts.
What ever happened to the Dolmar? I’d really like you to show a whole build on a 7900!
Got a 550xp that needs a muffler. Does the stock muffler have restriction issues like you talk about here?
Bob Bergman yes those mufflers are quite restricted! They get rather load when properly opened up
Does that 268 have a 52mm piston? What timing are you running? I want mine to sound half as good as that one does
52mm and stock timing!
Yeppers , lotsa “forum boys” cuttin the flywheel key way to advance the timing ... I prefer Harvey slogan of “we don’t make them run, we let them run!l
I’d take the info gleaned in these “chainsaw forums” with a grain of salt ... some of these gents got NO CLUE on how to build a WORK SAW that cuts with the quicknesss and more importantly LASTS LONG TIME !!!
Ironhorse, that's a beautiful 7900, looks great through your lens! Of course the Husqvarna is nice! I see you have a Fiskars X27 near the door, is that yours or your son's? I know Erik brought one before to your property. It rubbed off didn't it? I bought one last year in the winter. I like the Fiskars X27 splitting axe over a traditional maul any day of the week! I just keep the maul around because it doubles as a sledgehammer. I still love old hickory over synthetic though. I hope you keep in touch with Mr. Jeremy Bell too, he's another chainsaw prodigy.
Try the Fiskars isocore maul ... I own both the Fiskars axe x27 and the isocore maul and prefer the maul
Does it feel like swinging 8lbs? A traditional 8lb maul is heavy and cumbersome.
Richard Sullivan The maul is 33% heavier than the axe ... I like it better ; more force per swing ; the isocore handle delivers less vibration to the hands , and the other end can be used for driving stakes, wedges ... here’s a video of me busting up some red oak 23” rounds with it ... will the axe do the job ? Sure but swing for swing the maul is superior imho ...... czcams.com/video/gyUCKkQ5zDo/video.html
How do you get ahold of you to get a saw built ?
How do I go about getting you to work on a saw for me
Great video, just in time 1 ring piston, Is that common?
The second ring also stabilizes piston in the bore and transfers heat more effectively than one ring only
Later Ironhorse love it
My next power saw will be a 7900..🌳🌲🌿🌲🌳
Hello, very good video!! A few days ago I bought a new PS421 and I want to remove the catalytic converter. I am going to buy another muffler and leave the current one unchanged, because I want to have it as a spare in case there is any problem with the guarantee, to leave the saw as I bought it.
I have a couple of doubts. My new stock PS421 runs at 11000rpm at top speed, the mix is pretty rich. Is it possible to eliminate the catalyst and have the saw run well without having to regulate richer the high speed screw of the carburetor ? Since a special tool is needed, and the warranty is lost by doing so.
The other doubt is that in the exploded view manual, there are 2 different mufflers, one with a catalytic converter (serial number 195 174 550) and the other without it (serial number 195 174 500). Are They compatible? Can I buy the one without a catalyst directly, or do I need to buy the one with the catalyst and drill out the welded spots to remove it?
Thank you very much, I subscribe to your channel.
Jots! Both mufflers interchange! Shouldn’t have to adjust the carb!
@@theironhorse6600 Thank you very much! The high speed screw can be modified with a double D screwdriver, right? I say this to buy one in case I need it.
Can both mufflers be interchanged? I thought not, since in the exploded view manual they have some parts with different serial numbers (joint and connecting link), while in others it is the same.
Is it possible to make a mix between both mufflers? Leave the current rear half part (the one that goes to the cylinder, serial number 195 174 550), remove the catalytic converter and place the other front half part of the other muffler (195 174 500)? Will the mixture of both fit well? If so, it is much easier!
Thank you very much!!
I STILL WANNAl wanna a 268''''' I LOVE EM
Hows it going today
Ironhorse how much would I gain just with a muffler mod on my stilh ms310
Depends on what style MM ... 10% + or ~ ... you have to remove the limiters and retune
Husky sounds hungry let her eat what should you do with saw your going to store thanks
Harv what’s happening with the frankinsaw
Sorry for my english: The SLR pipe increases efficiency. Scavenging losses and burned gas bleeds the SLR back. Because of a higher amount of recirculated exhaust gas the ignition module is totally different. The timing is much earlier because the extra portion of burned gas reduces the speed of the reaction in the combustion chamber. The earlier timing compensates this. If you remove the SLR you will create horrible unused pressure to the piston, rod, bearings etc.. Unused because the pressurepeak is too early. Result is: much more fuel consumption, extreme high poision emissions, very short lifetime of the engine parts, too lean AF at higher speed (or too rich at lower speed, if you play with the carb. But you will never find a good setting. The SLR engine has a different carb). And ok you will get roughly 5% more peak power (by doubling internal pressure), because the SLR is a small restriction. So, it is a bad idea to remove the SLR.
I can tell u 100% that in practice you are wrong.
@@jaydee2620 Hi Jay, I think you have not the equipment to investigate this. Sorry. You need a power breake, a massflow meter for fuel and an exhaust gas analyser for CH, CO, CO2 ,NOx and O2. And a real time pressure indication system to know what you do. And many engines for test series. I was an engineer in the development team of this engine. Belive me you are not right and you are risking health for you and everyone who make the same modification because of the much more poisson exhaust you create. This engine can reach more than 1000 hrs without problems, but please dont make any blind modification. Regards.
Getting my saw for Christmas yay I’m gonna have to go find a hemlock and torch it off and call it my Christmas trr
Tree****
👍👍👍👍👍👍
Can't believe that was in the Dolmar muffler. That Husky sounds strong.. my friend left a red rag in a V8 engine once. Looked like cotton candy coming out of the exhaust. Very expensive drag engine ruined 😵
There's a "Bus Grease Monkey" video where he sucked a red rag in through the supercharger on the Detroit 2 stroke on his bus, which was parked with the exhaust facing to his wifes BMW. The car door was open and pieces of burning rag were spewed all into the car!!
Hey new sub here from bucking channel I have a 371xp that I want bored I was wondering how I’d contact you for that?
Edit: the term I see is called walkerized
ewww she sounds crispy !!!
Ironhorse!!!!!!!!!!!
I can get a white top for 80$ right now! If I wasnt a stihl guy...I'd be all over it.
STAY SAFE
😊😊😊👍👍👍👍🎅
Man??? I want that 268, im sittin here droolin over it!!!! id rather have that saw/?? than @ woman, does that make me sick?/ HuMMM?? 0 well, so it be..... make a old man Happy Andy... sell it to B.....Please???
Man that muffler is large enough to cook a pot of soup in! 🤣
That stupid kidney pipe in that muffler was part of their response to the emissions stuff. They didnt have that when the first came out with the 7900 under the Dolmar name. Then they changed it to a 7910 and had that weird pipe in them. Then they changed the name to Makita. Nice stuff, keep it up.
Dolmar became part of the Makita group in 1991.
@@stuntmanroy they didnt completely buy them out in 91 did they?
Oh isn’t the epa wonderful ? A pnw forest fire will spew more “pollution” in the air than 1billion chainsaws running for 8 hrs a day for 10000 years ! 😁