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.
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.
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. 👍💯
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 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
@@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 :)
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!!
@@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.
@@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.
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.
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.
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?
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
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 :)
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
Hey mate! I’d suggest doing a pressure and vacuum test first and also inspecting the piston skirt for scoring. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-kUmeyVcnZrs.html
