TUNE YOUR 2 STROKE - LEAN VS RICH

[@GuysPlayingWithTools]

That's a great explanation of what we all shoot for

[@VintageEngineRepairs]

Thanks Bill!

[@thedahlins]

Thank you! I've read through quite a number of the comments and they're all spot on! One referred to you as a professor which is something I've been thinking too. Your videos and explanations go to the essence of how something works. Few professors I know can reach this level of detail though! Your clear explanations allows me to understand how something works and they also reveal how little I actually know! This allows me to have a much better starting point in learning mechanics. Few people are able to teach at this level.

[@VintageEngineRepairs]

Thank you for such kind words! We’re all leaning, I do every day and there is a lot I don’t know. None the less I appreciate your kind words :)

[@SimonE-et2xg]

Thank you Tom for such a clear, straight to the point, informative, high quality video. Your video production skills are superb.

[@VintageEngineRepairs]

You’re welcome! Thank you for the kind words :)

[@dennishurlbert6143]

Good stuff Tom, this is soooo important! I need to be reminded of this often especially at the start of the season.l have a tach and people need one to understand to the extent of engine tuning.it’s vital no doubt. I look forward to your videos. 🙏🏻 Thank you.

[@VintageEngineRepairs]

Thank you Dennis! Very tricky to explain lean vs rich in words, a video does a better job :)

[@Big_Johns]

Nice demonstration Tom, the VIDEO WAS MOST ENJOYABLE. 🙂👍

[@VintageEngineRepairs]

Haha bless you mate! Thanks :)

[@Big_Johns]

🤣👍🏼🤣

[@tinkeringtaylor3053]

capital letters John, 🤔🤔

[@Big_Johns]

LoL... I'm sorry Mr Taylor, I was just typing it as I was hearing it. 🤣🤣

[@tinkeringtaylor3053]

@@Big_Johns I thought you were trying to get something off your chest 🤣🤣🤣

[@mrtennessee6862]

Great job professor 👍, you should teach this at MIT. Seriously your very easy to understand. I have to use my Fast Tach because of my hearing and I don't completely trust myself. 👍💯

[@VintageEngineRepairs]

Thank you :) glad you enjoyed it! A tach is a wonderful tool!!

[@steveriggenbach90]

Great sound info. Will have to listen several times. Been tuning by ear, but can help to constantly hear.

[@VintageEngineRepairs]

Thank you! Yes you may need to play it back, with head phones in :)

[@steveriggenbach90]

@@VintageEngineRepairs helps to use your own. Count starting threads, then adjust rich and lean. Try to make the sounds.

[@burt1758]

Tune by ear? Really. I always tune to get the plug to the right color. Only been doing it 40 years.

[@KensSmallEngineRepair]

I have to make sure I use my good ear! Another great video Tom!

[@VintageEngineRepairs]

Thanks Kenny!!

[@barryewalt3250]

As usual Tom good video, I always learn something new with your info.👍

[@VintageEngineRepairs]

Thank you Barry!!

[@guymansford7123]

Thanks Tom, that is the most useful tuning video I've ever seen. Understanding the return to idle time and how it settles over the next 30 secs is really helpful. You mention easier starting with a richer L screw. I have trouble starting some of my 0xx series Stihl saws. Do you think running richer L would help?

[@VintageEngineRepairs]

You’re welcome! Yes very likely! It could be something else like needing new diaphragms or an air leak, but it may be necessary :)

[@petefroud5308]

Good job Tom . You know i love two stroke's.

[@VintageEngineRepairs]

Thanks Pete! Me too :) great stuff!

[@kodiepeterson6269]

Great video! Better than anything online

[@VintageEngineRepairs]

Thank you!

[@kodiepeterson6269]

@@VintageEngineRepairs I have a quick question, so I just ordered a new 2 stroke from eBay and I have been trying to get it run, but every time I full throttle it dies after 1 minute. It says that I should be using 25:1 fuel ratio in the description of eBay. It also may just be the tunning. Do you have any idea why this is happening

[@VintageEngineRepairs]

@@kodiepeterson6269 it sounds like it could be lean on the H screw, though without seeing it it’s impossible to say! I’d suggest checking the obvious like fuel lines for cracking and filter for blockages. Then check the piston for scoring (remove the muffler) and then lastly open the H screw 1/4 of a turn and see what happens :)

[@kodiepeterson6269]

@@VintageEngineRepairs I could send a you a photo through email if possible

[@kodiepeterson6269]

I have been at it for 3 days and I checked for scoring, there is none

[@williamemerson1799]

Very informative as always.👍🍻

[@VintageEngineRepairs]

Thank you William :)

[@carl0sfl0res]

Great explanation good job on video

[@VintageEngineRepairs]

Thank you!

[@raymondthompson4222]

Another great video

[@VintageEngineRepairs]

Thank you!

[@topconker2909]

Great vid mate, you know how much I hate 2 strokes!!!!!!

[@VintageEngineRepairs]

Thanks Conk! I’ll get you round to loving them eventually haha

[@SouthernMNTV]

Thanks for this video it explains it really well

[@VintageEngineRepairs]

You’re welcome :)

[@tinkeringtaylor3053]

Tom you have absolutely puzzled me with this one 🤔,to me if it runs its sold or fixed 🤣🤣

[@VintageEngineRepairs]

That’s Ok Nev :) I go in to more detail in some videos and less detail in others. It gives my audience the option to dig as deep into a subject as they wish! Thanks for watching mate!!

[@motoendurofun]

perfect video

[@VintageEngineRepairs]

Thank you!

[@vinopan5374]

Very nice! Great video! How would you handle the situation where you unknowingly have a very slight air leak somewhere? Thanks again.

[@VintageEngineRepairs]

Thank you! I’d find it using this method :) kzbin.info/www/bejne/g5CxYoysdrSNpcU

[@jimbrewer2893]

Very good tutorial.

[@VintageEngineRepairs]

Thanks Jim!

[@TheGreasyShopRag]

Yes, I enjoyed the video.

[@VintageEngineRepairs]

Thanks Scott!!

[@fmp2274]

Unreal video mate

[@VintageEngineRepairs]

Thanks mate :)

[@mtopuk]

its okey to understand and tune basic 2 stroke machines like chainsaw, blower etc. Only has one or two stage Air screw. But its not enough to advanced tuning related rev up and increase engine response of the bike engines have jetting or else adjustment abilities.

[@VintageEngineRepairs]

Fuel screws on 2 stroke ope. Bikes have 3-4 fuel circuits. A pilot jet and air screw, main jet, needle height, the needle taper and power jet. The same principles apply to tuning them in terms of lean and rich.

[@7Toki777]

Thank you!!!

[@VintageEngineRepairs]

You’re welcome!

[@rickthelian2215]

Tom agree with Guys playing with tools....😊😊😊 Can you do that for the NBN bloody Not Needed Internet...😊

[@VintageEngineRepairs]

I’m sorry mate I don’t understand!

[@rickthelian2215]

@@VintageEngineRepairs Sorry internet in Sydney was playing up whilst watching, hence asked to tune up my internet (NBN) like the machine. Have backup mobile through Optus on my new Modem but there’s a delay when NBN turns off and on. They don’t have this issue in Melbourne.

[@qwertykeyboard5901]

Something strange about my weed wacker is how it will stall if the nose is tipped down with it too rich. Opposite when nose at the sky. Weird fuel pooling perhaps?

[@VintageEngineRepairs]

Yep fuel pooping, probably in the intake manifold. Try running it as lean as you can on the L screw whilst still getting good off idle acceleration and easy starting

[@qwertykeyboard5901]

@@VintageEngineRepairs Thats what I did. Probably partially caused by the pumping diaphragm being slightly wrinkled.

[@RightLane393]

When I pull the clutch my engine shut off, or when I stop hittin the throttle the engine I s go BRUUUUU like no air going in

[@VintageEngineRepairs]

Burrrr is a lean symptom on L

[@mjshaheed]

Audio quality could have been a little better

[@VintageEngineRepairs]

Yep I agree, since this video I have actually started to use a lapel mic!

[@mjshaheed]

@@VintageEngineRepairs This was the first video of yours I had watched. Yes, the other videos have better audio quality. 👍🏻

[@VintageEngineRepairs]

@@mjshaheed glad it didn’t put you off or turn you away from the channel. I also appreciate your honesty about the audio. Thanks again :)

[@tomasznumrych7187]

Any tips for adjusting a single screw carburetors? I'm having trouble getting my ryobi string trimmer running right

[@VintageEngineRepairs]

Which screw do you see on the carb? Give me an idea of where it is :)

[@tomasznumrych7187]

@@VintageEngineRepairs It's a Ryobi RY253SS trimmer. The adjusting screw is an "A circle" located in a brass recessed space in the middle of the throttle body plate. It also has an idle screw. I tried to attach a link to an image for reference but I think YT flagged my comment.

[@tomasznumrych7187]

@@VintageEngineRepairs what do you think about that single screw carb adjustment?

[@biggussniffus5537]

This isn't really helpful for my 2 stroke motorbike situation. I'm having major problems getting it tuned right. Stationary it runs absolutely sweet. It will idle all day, revs straight out when I stab the throttle and it comes right back down. No major smoke either. When actually riding under load, it really hesitates to pull into the powerband, it sounds lean just like this video shows. I'll need to drop down a gear or smash the clutch to get it going. If i'm anywhere under 3/4 throttle its just BOG. There is no detonation and the plug is super black. The metal band around the electrode is still shiny after 4 hours of riding. I just installed larger jets yesterday and went riding today, the low end response was the same.. if not worse. except I now have a hanging idle issue. But when it's on the pipe wide open throttle it goes much better.. I've been looking everywhere on the internet for help but can't seem to find anyone with a similar situation. I'm going crazy lol

[@VintageEngineRepairs]

Hey mate! I’d suggest doing a pressure and vacuum test first and also inspecting the piston skirt for scoring. kzbin.info/www/bejne/oYbQlqyMmNONqNU

[@biggussniffus5537]

@@VintageEngineRepairs bike has 5 hours on a new top end, 50 hours on bottom. All new gaskets, brand new reed valve boot. Compression is high.

[@biggussniffus5537]

@@VintageEngineRepairs just going to sell the bike hey hahha money pit KTM

[@Op1zilla]

👽👍🏻✨

[@VintageEngineRepairs]

👍

[@jwayne777]

That great tune always seems so elusive . I posit, Is it an unatainable utopian ideal? Hmmm...

[@VintageEngineRepairs]

Haha! It’s very much attainable, but it’s certainly a skill that takes time and effort to hone. It’s one thing learning to tune one engine, that works well. It’s a whole other ball game to know the intricacies of tuning across the board, what the engine needs, what isn’t working, blockages, etc :)

[@gus7130]

extraordinary video! Could you make a similiar video for the H mixture needle. I have never been able to understand the 4 t sound😅

[@VintageEngineRepairs]

YesI have one :) have a watch of my “how to tune a chainsaw” video! Hope it helps :)