Chainsaw cut away #5 , transfer blowdown explained!!

[@jeffreyrubish347]

Pretty good info! I'd welcome a muffler discussion as muffler mods are a pretty basic, easy thing to do to improve even a stock saw.

[@NickPixelTV]

You def didn’t miss your calling in life. Great Teacher 💪💯

[@parkerearp4316]

You do a great job relating information, I've been a diesel technician for 15 years and 2 strokes have always been like wizardry to me lol. I've been collecting saws for about 2 years now and tinkering here and there figuring out what makes them tick but your videos have definitely shortened the learning curve for me and gotten me excited to start building and porting saws.

[@cliffpalermo]

Totally agree. With every video a greater understanding is achieved.

[@nicholasschlais3329]

Diesel tech here too. Dito on the wizardry. Engine with out valves crazy.

[@rydplrs71]

You are exactly right about blowdown, a properly tuned 2 stroke the exiting exhaust actually assists in bringing the new fuel/air in and getting all the exhaust out. Then there is the exhaust rebound you discussed which shouldn’t be confused with back pressure. It’s simply a pressure wave. It does push a bit of the excessive new fuel back into the cylinder after the intake is closed but just as the exhaust is closing, to increase the compression and put more air and fuel into the cylinder to fire. This is why tuned race saws have a cone shaped end before the exhaust exits, this increases the duration of the pressure wave maximizing that extra fuel air stuffing. It’s very much like adding a turbo or super charger. Longer blowdown quite simply allows the explosion to put more power into the crank. That fuel efficiency. There are obviously limits as you have found.

[@robertwilmesherr7002]

I've had 2 stroke engines all of my life, and now I understand how they operate. I am rebuilding my first saw now. I am staying stock and hoping for a running saw. Your videos have helped me so much. Thanks again.....

[@tinmanssaws]

You're welcome!!

[@sagebrushhillbilly4655]

At 10k rpm, that piston is changing directions 333 times per second. These machines astoubd me. This is an outstanding video that offers a beginner a complete understanding of what happens through one revolution of the rotating assembly. Way to hit it out of the park with this one!

[@josevelezvelez7731]

lol yea yea it will take you you can can stop and pick pick you lo

[@LumberjackSmokestack]

Absolutely love the cut away series. Thanks Tinman!

[@FALLONMICHAEL1022]

Man I’m like a sponge just taking all this in and I can’t get enough! Im starting to get a group of saws and working on getting everything i need to start experimenting. Degree wheel, a dremel, mics, scale I can’t wait to start my first one. Im going to be super cautious probably won’t change to much to fast but I just want to do my first base gasket delete and muffler mod! Lol I just can’t get enough info but your videos are a HUGE help. Thanks and keep it up!👍

[@TheJonsberg]

Very informative and easy to understand, Blessings in Christ 🇧🇻

[@aaronpowell4885]

As always, perfect explanation👍 love the cutaway! The way my mind works, I've always been able to visualize flow or fluid dynamics. So I totally understand what you mean in your explanations. Would love to see mufflers/pipes in this series! Take care and stay warm aswell!

[@StevenLettsPerformance]

I'm a visual learner too very nice explaining how this works bud 💪

[@glenngray6895]

Your videos are JUST what I needed Very informative

[@ChevyGuy70]

Thank you professor Tinman 😂👍 literally the best guy out there to explain two strokes so I can understand it. love the content brother😎

[@mikedraper453]

Bro, thanks for helping me understand timing on a 2 stroke. I've been only into motorized bikes for a couple of years now and I still knew nothing about what was going on. I was just putting kits together and riding like that. But I have enough engines here where I don't have buy new and just fix these. Your channel is helping me achieve that goal. Very, very , informative. Absolutely great work. Thanks. Build break and fix channel does that cutaway too. Great work. I'm getting better at putting my engines back together again.

[@whiteknucklejunkies1094]

I love these cut away videos! Thanks Tanman!🤙🏼

[@Saw_Squatch]

Love the informative content Tinman, keep it coming! I'm going to be on bed rest for at least another week (burried an ax to the bone on my left leg) and it's killing me not to be out running a saw!

[@harrybrandt2462]

Owwwch!!!! take care of yourself man....

[@Saw_Squatch]

@@harrybrandt2462 I'm trying, guess I need to try harder lol

[@LumberjackSmokestack]

Ouch! Hard times. Get well!

[@aaronpowell4885]

Ooof, take er easy and get well soon!

[@whatnowstinky]

ouch! i hope you heal up quickly and well.

[@tjlovesrachel]

I agree with pretty much everything that you’ve said…. Except the “modern 2 stroke thing”… I feel they are just so choked up in just about every which way.

[@stevessaws3612]

Great vid Tinman! I agree with your technique. I'm gonna tell my missus about this vid. Lots of short blow down, lots of longer blow down, lots of stroke, lots of pulling......👍🇦🇺😂

[@charleswilson577]

You definitely have a special knack for this. Considering everything it's best on youtube.

[@thomasgronek6469]

TIP: Take a look at the flywheel, bring the saw to TDC, Just above the coil, on the case, , , ,there might be a timing mark. There also might be one on the flywheel. Results may vary, , , I am working with an OLD type 1, stihl028 (it uses 4mm cap screws, not T-27s. Measure the distance between the marks, and the circumference of the flywheel, , ,,calculate the timing advance (I am calculating 12 degrees advance). I don't know if there is an electronic advance in addition to that (from the coil). As Always, , ,Thanks for the presentation, , ,I have learned so much.

[@Finom1]

Bless you for sharing your wisdom with us, TinMan!!!

[@jeffely1828]

Best 2 stroke explanation I have ever seen Thanks

[@11bayrat]

Arduously great video! Thanks for sharing your thoughts and time

[@DirtRoadLanding]

Fantastic video. Wonderfull tutorial as always. You are the original youtube " inventor" of the cut away cylinder demo...Many will copy you. Cheers!

[@chriskocher4238]

Kx500 rider here...big bore two strokes for life!

[@sandsock]

I wish i had u as a small engine teacher in school. This makes sense , we werent allowed to touch 2 strokes. I just figured we had valves someplace hidden. I had a 034 that was hard kicking and destroyed pawls. Then my bearing seized and spun in the case. I wish i tore it apart when it was dead, instead of donating it for parts. This is absolutely fascinating

[@robert4027]

I had a YZ 490. 35 years ago. . it was scary fast dirt bike .. beaten to pieces that thing would still give you a Ride for your life 💪💪💪

[@McCullochMac6]

Love the cut away series...😁

[@whatnowstinky]

i love this stuff!!! thanks tinman. so a short blowdown saw would like a bigger opening in the muffler, to drop the pressure in the muffler faster. recently, either you or Harv was saying something about a lot of snowmobiles being very oversquare, how does this relate to a lot of them long blowdown?

[@mikedraper453]

That air leak happened to one of my engines and it burn up my piston. I know why now. Thanks!!!

[@tdawg8605]

So raise the exhaust port and widen upper transfer... is the way to look at it, shorter duration and quicker recharge for next cycle. But all within the optimal timing values. Very stoked about this tutorial. Thanks again Sensei Tinman...Mahalo🤙🤙🤙

[@scavuman]

Truly Enjoy Watching and Learning.

[@glockky1]

Excellent video! Love your content. Keep the info coming. And figure that echo out so I know which way to go with my 590 I’m an echo fanboy I can’t help it

[@kevinmaxam2414]

Great explanation and display. Thank you. As always be safe and be careful.

[@glenngray6895]

I run the 66cc 2-stroke bicycle engine I've had several and they don't run the same. Quality control really isn't there. You have explained to me how to properly time and tune

[@KainKustomGarage]

Excellent Explanation Tinman! Helps me understand alot better 😁

[@mrtweek454]

Tinman great explanation of transfer timing this was awesome keep it up good sir!

[@andrewklein2349]

Very good explanation! Now it starts to make sense why some ported saws seem shaky or stutter-ey. The pressure from the bottom end, top end, and exhaust must all be kind of fighting eachother, eh?

[@alanwatts9232]

Thanks Tinman, good video. Pipe info would be nice. Merry Christmas.

[@jercycabbigat1842]

Awesome video! I learn a lot

[@dan-dan-da-treeman]

That bad arrow( you drew for the exhaust exit) was the hammer! 🙂. Thanks for sharing all you do sir.

[@nathanielw.h.9039]

Amazing video Tinman!!!

[@21ratrod]

Tinman Great video !! I Learned A lot... I would like to see basically the same video but with the Timing Wheel installed Im Losing the lesson when you talk about the #'s ... 2 strokes are new to me @ 61 years Im still learning and Im Hooked on this channel...Keep up the Great Content .Thanks

[@tinmanssaws]

Check out the cutaway playlist, I made that video awhile ago

[@thebustedwedge1141]

Great video Tinman! Very informative and very well explained. Thank You for the info. 🤙

[@ScrewdriverTUNING]

Fantastic video my friend. Beautiful explanation.!!!! Kindness and love

[@justinweaver8787]

Great information an explanation. Stay warm sir. Have a good week and Christmas.

[@johnyk71]

Great stuff, keep them coming if you can, hope you have a great Christmas from Ireland

[@davidmech2956]

More excellent information. Thanks! I have much to learn.

[@waywardshed9721]

Really enjoyed this, good work! Looking forward to your one on pipes

[@tspoon20]

Awesome explanation of how it works.

[@jamesdepalma6341]

I think you should do a video on the ms500i,they tend to have shorter blowdown and higher intake timing numbers. I think it would be neat to discuss this a little more.

[@chrisvincent5938]

Just the video I was needing. Been thinking about the why behind transfers

[@nicholasschlais3329]

Awsome video as always Tinman knowledge is power and our case makes more power!

[@travisweldmaster7815]

Just the video I needed solid gold content brother, thank you

[@paulmckenney8096]

Thanks! I love these cutaway videos!

[@NorAlb_Chainsaw_Carver]

Good stuff man! Merry Christmas!

[@jdspencer4297]

Man your talk reminds me of my dad talking about short stroke and long stroke. The short stroke wind up faster and the long stroke has better run out

[@thebradleysoncatbirdhill6849]

I'm going to have to ask Santa Claus for an extra pack of notebooks! I'm literally filling them up every time I watch one of these videos. So well done! 💪👍

[@alvinmcdonald390]

Awesome video Tinman ..!!! Really interesting...💪🏻

[@michaeltimmermann3985]

Hello Tinman, once again a very nice and informative video. Today I also watched your carburetor tuning video. Could you sometime explain how and why a four-stroking engine leans out under load? Thumbs up and greetings from Germany!! 👍

[@donnywalker4691]

Great video well explained stoke the fire

[@donnywalker4691]

Can we have a yak tomorrow if you have time I have time between 10 and 12 eastern time if it works we are all busy eh bud

[@johnarnettsways.8758]

Appreciate that cut out tinman. I was have a hard time rapping my head around it. Merry Christmas buddy. 🌲🌲🌲❤️❤️❤️

[@tinmanssaws]

Merry christmas

[@z1berzerker]

Great 👍 Info Tinman

[@jimmarler5805]

Great explanation Tinman!

[@P61guy61]

Excellent! Thank you for posting.

[@ELISRACINGTEAM]

thanks for sharing we have a motor have a 52mm sthil we using the piston that have the 10mm pin bicycle do 57mph again thanjs for sharing

[@bill154cub]

It’s so cold the six cats circled there wagons around the woodstove.

[@sonofthunder.]

great visual,ive got alot to learn but these help,a animation would be really cool

[@ToddAdams1234]

Definitely do the drawing thing on the mufflers. It’s going to be a good help for me, especially for my 372XP.

[@darrelljohnson4658]

Good work sawrus Trees-R-Us

[@rchighfield1]

The only thing worse than not being able to join a livestream…not able to join your own that you started! Gotta chuckle about that one! 🤣

[@robertgoth5570]

Merry Christmas from Mid-Minnesota!

[@Finom1]

Ell done, love your closeups:)

[@johnarnettsways.8758]

Bunker down and kick back beside the new fire and just relax buddy. Appreciate the tec on the saws❤️🌲🌲🌲❤️

[@erichiles9568]

I seen your 490 in video you made when buckin was therei have the old yz 465

[@jensenwilliam5434]

Thank you!!

[@CharlesBrisco]

You do a lot better explaining things on camra I don't do well on camra lol I try tho but I like long stroke long blowdown saws

[@DG-od4si]

nice video, thanks

[@rem24319821]

Nice video

[@ronnieb7408]

Widening the exhaust port would increase the scavenging without loss of torque with the right exhaust pipe?

[@michaelgarrow3239]

Canadians look longingly south to the balmy weather in North Dacota…

[@mm88swrt]

Merry Christmas bud!

[@jacobhicks7959]

After the gasses are done expanding and the pressure drops on the exhaust side would the blowdown finish pushing the spent charge out?

[@markqueen4201]

tinman will a muffler mod help a stock 025 by itself

[@DaleGallagher]

i see you and Buckin' pull the starter cord when you are shutting down your saw. What does this do and should I start doing the same?

[@fredpayne7581]

Merry Christmas 🎅 🎄 brother

[@bigfootandbananaman4746]

Thank you tinman

[@jimknowlton342]

How do you measure blowdown without hacking the cylinder in half?

[@dubbssawshop]

Shine a flashlight thru the exhaust port into the cylinder, then look thru the spark plug hole to see when the piston cracks the transfer ports, then just read the timing wheel. You can also use a endoscope thru the plug hole and look for the same thing, whatever the difference in degrees between exhaust opening and transfer opening is, is your BD # in degrees.

[@lawrencereed8106]

larry reed i rebuilt a husquvarn 395xp new jug and piston can't pull start. what is my problem

[@donnywalker4691]

I agreed

[@marcduclos9789]

explosion =detonation

[@GozonTheGonsarian]

Tinman you never talk about the 262xp but you love the 200's why does the 262 get no love from you saw guys? I love mine.

[@1979kw]

my old McCulloch and me" buzz martin

[@michaelbrinks8089]

I'm a newbie wanting to do a port polish job on small 2 stroke bike engine....Would it be safe & add power to bevel/round the bottom lip of the intake port without lowering it no more than a 1/2 mm for better intake air flow, then bevel the bottom of the intake side of piston skirt, bevel the top lip of the exhaust port without raising it no more than 1/2mm. Then polish the exhaust port and polish the open transfer ports or would you want to leave the transfer ports roughed up for more turbulent airflow like the intake?

[@jacobhein4319]

Short answer, lowering your intake and raising your exhaust could possibly increase power as long as you dont go too far. Its hard to say what would be too far without a timing wheel.

[@travisweldmaster7815]

And im back again a year later lol

[@williamboner6924]

Looks like North Dakota

[@steelcityperformancesaws]

hello tinman! meryy xmas

[@jeffkenyon7084]

Hell yeah

[@michaelgarrow3239]

167 times a second…

[@williamboner6924]

Where do you get a timing wheel?

[@rockhopperdockhopper5261]

EBAY OR AMAZON OR YOUR LOCAL MOTORBIKE OR CHAINSAW DEALER

[@thomasgronek6469]

There are printable timing wheels on line, , , ,some can be printed to the back of a CD, but they are a bit small, , , ,look for a bigger one, and laminate it to something (cereal box might work fine), (I work on a budget).

[@tdawg8605]

An old 7 1/4 skill saw blade works too.