I've been playing with a Husky 445, and it took a while but it flashed on me how it works. The 445 had a separate air valve and port with a conventional carb, so it's easier to understand. What's going on is the extra air port flushes the exhaust out with fresh air, and that does 2 main things. 1 - it reduces intake contamination so the engine has a air-air/fuel mix in the cylinder instead of an exhaust-air/fuel mix. That helps improve combustion and power. 2 - it helps prevent raw air/fuel mix from being carried out the exhaust port - this is where the reduced pollution happens, as I understand it. I'm still learning this stuff myself, I'm from the days of loop charging outboards, which was essentially trying to produce a more pure intake charge by using excess air/fuel mix to push out the exhaust as a slug. I'm hoping to further the conversation here, and am totally open to other, possibly better explanations of this system, as I really want to understand it's minutia. It would seem to me, purer intake charge=more power, thus, this system may be hotroddable, albeit a bit harder to understand. Thanks for the lesson!
I hope and pray that when me and my wife are older that our kids gets straight and will care for us the way you seem to care for your elders in your family. I enjoy the videos you do and i appreciate the education im getting from you. Thank you for doing what you do
It is for epa. The air charge is designed to get between the exhaust and intake gasses as they are entering and leaving. The theory is that the fresh unfueled air leaks out at the end of the exhaust cycle instead of unburned intake charge.
Thank you for the tec on the saws my friend. Will continue to send prayers for you and the family. God bless yall and a special prayer for momma and son. ❤️🌲🪓👊🏻🙏
Morning Bellhopper hope you are having a great day today stay cool stay safe be kind 🙂 and I'm thinking of her and wishing her a speedy recovery and keeping her in my prayers as well.
Praying for y'all Bellhopper!! Keep you head up and keep doing what your doing!! Take care, love the ones you hold close and spend all the time you can with them!! Life is short and God is good!! Thank you and God Bless!!
Diesel engines use something like a strato. They have a hose that runs from the exhaust to the air filter. The exhaust has fins. That causes a vacuum and it pre pulls the larger dust particles off and blows them out the exhaust. Your adding clean air to the exhaust and let's the engine run better and cooler. When the exhaust goes out. Everything gets hot and runs bad . I think this is basically the same thing on strato saws. It adds air at the end of the combustion cycle. To help blow it out and suck new fresh air into the air filter. I don't have a strato yet, but I am really looking at getting a 562 or 550 pretty quick
Great video! I'm currently reading Small Gas Engine Repair by Paul Dempsey. It has a section that covers stratified engines. It's a great book with good explanations but I find the diagrams to be a bit confusing. So I really appreciate how you tear down the 2 different engines and show us the differences first hand.
FYI, in traditional 2 stroke engines, when the air-fuel mixture enters the cylinder from the crankcase, it pushes out the exhaust gases. Some of the unburnt fuel also ends up getting pushed out the exhaust before it can be compressed by the piston. This is inefficient. In the stratified 2 stroke, fresh air enters from the transfer port before the air-fuel mixture can enter. The fresh air pushes out the exhaust so that less unburnt fuel is wasted. That's what makes these engines so efficient.
The fresh air charge is supposed to push spent exhaust out. Without raw fuel mix escaping. As you say it creates a lean mix above the piston so they are hotter and burn up quicker
Hang in there buddy, we all pullin for you guys! Definitely learned something in this video! It’s all way above my pay grade though! Take care and stay safe!💚🪓❤️
Bellhopper, may God Reach out Touch and Heal you, your family and everyone in your united in love community:) God thank you for putting on the Full Armor of God on Bellhopper to protect him and his family from all evil, sin and sickness in this world:) Everyone please keep Bellhopper and his family deep in your prayers, for healing and protection:)
Xtorq won't run with a XP piston either. Found that out back when xtorq saw come out. Got one in for a rebuild and just got regular 372 piston for it. Wouldn't run😂😂took min to figure that out lol
I have three of the Poulan type x-torq, they are the 40 something CC saws. I'm not a fan... They are lazy and fussy as heck. My theory is the air ports just dilute the exhaust. I'm getting ready to try to mod them and get the cylinder from the non x-torq similar saws and I also want to experiment blocking the air port and tracking how the air ports flow. It's very interesting how those saws work. Love the video.
Purpose of strato aircharge is to block fresh fuel-air transfer into cylinder from escaping exhaust port it is an emissions thing that is actually a plus
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I've been playing with a Husky 445, and it took a while but it flashed on me how it works. The 445 had a separate air valve and port with a conventional carb, so it's easier to understand. What's going on is the extra air port flushes the exhaust out with fresh air, and that does 2 main things. 1 - it reduces intake contamination so the engine has a air-air/fuel mix in the cylinder instead of an exhaust-air/fuel mix. That helps improve combustion and power. 2 - it helps prevent raw air/fuel mix from being carried out the exhaust port - this is where the reduced pollution happens, as I understand it. I'm still learning this stuff myself, I'm from the days of loop charging outboards, which was essentially trying to produce a more pure intake charge by using excess air/fuel mix to push out the exhaust as a slug. I'm hoping to further the conversation here, and am totally open to other, possibly better explanations of this system, as I really want to understand it's minutia. It would seem to me, purer intake charge=more power, thus, this system may be hotroddable, albeit a bit harder to understand.
Thanks for the lesson!
I hope and pray that when me and my wife are older that our kids gets straight and will care for us the way you seem to care for your elders in your family. I enjoy the videos you do and i appreciate the education im getting from you. Thank you for doing what you do
It is for epa. The air charge is designed to get between the exhaust and intake gasses as they are entering and leaving. The theory is that the fresh unfueled air leaks out at the end of the exhaust cycle instead of unburned intake charge.
Good explanation buddy! That 372 xpxt cylinder looks like has a angry intake when the pist9n is init
Thank you for the tec on the saws my friend. Will continue to send prayers for you and the family. God bless yall and a special prayer for momma and son. ❤️🌲🪓👊🏻🙏
Morning Bellhopper hope you are having a great day today stay cool stay safe be kind 🙂 and I'm thinking of her and wishing her a speedy recovery and keeping her in my prayers as well.
Prayers for you and the family Mr. Bell...
Prayers for you all your family Bellhopper!!!!!!!!!
Good one. Appreciate the information. Drive safe.
Praying for y'all Bellhopper!! Keep you head up and keep doing what your doing!! Take care, love the ones you hold close and spend all the time you can with them!! Life is short and God is good!! Thank you and God Bless!!
Continued prayers for y’all and T glad rehab is doing well! 👍👍👍👍🇺🇸🇺🇸🇺🇸🇺🇸🙏🙏🙏🙏
I know Echo hasn’t went the way of strato yet, but they’ve changed the cylinder to meet epa regs.
Thanks Bell Hopper. Always excellent explanations.
Very good vid Hopper.
Diesel engines use something like a strato. They have a hose that runs from the exhaust to the air filter. The exhaust has fins. That causes a vacuum and it pre pulls the larger dust particles off and blows them out the exhaust. Your adding clean air to the exhaust and let's the engine run better and cooler. When the exhaust goes out. Everything gets hot and runs bad .
I think this is basically the same thing on strato saws. It adds air at the end of the combustion cycle. To help blow it out and suck new fresh air into the air filter.
I don't have a strato yet, but I am really looking at getting a 562 or 550 pretty quick
You explain things well. So basically a stratto saw blows down with fresh air rather than a air fuel mix making it a greener saw so to speak.
Prayers buddy hope everything gets better back to normal an everybody gets well. Stay safe an have a good week buddy.
The carb on a stro saw is a little testy to adjust. The air pressure and humidity have a lot to do with it.
Great video!
I'm currently reading Small Gas Engine Repair by Paul Dempsey. It has a section that covers stratified engines. It's a great book with good explanations but I find the diagrams to be a bit confusing.
So I really appreciate how you tear down the 2 different engines and show us the differences first hand.
FYI, in traditional 2 stroke engines, when the air-fuel mixture enters the cylinder from the crankcase, it pushes out the exhaust gases. Some of the unburnt fuel also ends up getting pushed out the exhaust before it can be compressed by the piston. This is inefficient.
In the stratified 2 stroke, fresh air enters from the transfer port before the air-fuel mixture can enter. The fresh air pushes out the exhaust so that less unburnt fuel is wasted. That's what makes these engines so efficient.
The fresh air charge is supposed to push spent exhaust out. Without raw fuel mix escaping. As you say it creates a lean mix above the piston so they are hotter and burn up quicker
I like more the old ones because i have a 372xp of 2001!
Hang in there buddy, we all pullin for you guys! Definitely learned something in this video! It’s all way above my pay grade though! Take care and stay safe!💚🪓❤️
Bellhopper, may God Reach out Touch and Heal you, your family and everyone in your united in love community:)
God thank you for putting on the Full Armor of God on Bellhopper to protect him and his family from all evil, sin and sickness in this world:)
Everyone please keep Bellhopper and his family deep in your prayers, for healing and protection:)
Well explained 👍
Xtorq won't run with a XP piston either. Found that out back when xtorq saw come out. Got one in for a rebuild and just got regular 372 piston for it. Wouldn't run😂😂took min to figure that out lol
I have three of the Poulan type x-torq, they are the 40 something CC saws. I'm not a fan... They are lazy and fussy as heck. My theory is the air ports just dilute the exhaust. I'm getting ready to try to mod them and get the cylinder from the non x-torq similar saws and I also want to experiment blocking the air port and tracking how the air ports flow. It's very interesting how those saws work. Love the video.
Video starts at 6:10 y'all. :)
Huh? Lol. Mercy buddy
Air injection into the crank case.
First
Next time...maybe?😁
@@philmickey7247 I was video chatting jereme when he was uploading so I was at the ready lol
Buddy you look run down, needs some rest!
second
Direct air injection hmmm
I’m pretty much like you I don’t get it either
Purpose of strato aircharge is to block fresh fuel-air transfer into cylinder from escaping exhaust port it is an emissions thing that is actually a plus