Hit miss timing

This is without doubt the clearest explanation about the relationship between crank & ignition/valve timing. Many thanks for spending time for us all. 👍

What a GREAT TUTORIAL. Nice to see it explained so well so that some of us amateurs can understand it properly. WELL DONE.....THANK YOU 👍👍👍

Physics at its best. Thank you for explaining how a 4-cycle engine works. I love these hit and miss engines. I will own one somedays... ⭐⭐⭐⭐⭐

Just a quick tip... I used to drag race motorcycles (D gas... 500cc). I once had a fella show me how to determine exact TDC on my engines. Take an old spark plug, bust out the guts and tap it for whatever bolt will fit into it. By running the plug/bolt arrangement into the plug hole, you've made an adjustable piston stop. After attaching a degree wheel or even an unmarked disc, you carefully turn the crank BY HAND until it stops against the bolt. Mark your degree wheel or plate at near TDC. Now turn the crank the other direction until it stops again and make a second mark. One half the distance between those two marks or numbers is EXACTLY top dead center. Of course, this only applies to engines with the spark plug in the head. For others... use one of the valve holes with a plate across the head??? PS. Mark, that was the best explanation I've seen on YT of how a 4 stroke works. Great job!

An EXCELLENT explanation ! Thanks for taking the time to make this video. I'll be rebuilding my 1924 one and a half HP John Deere "E" this coming winter. Thanks again !

Mark, Thank you for a fantastic video.  I was given a small hit and miss because the fella that had it could not get to run.  Before he pulled the remainder of his hair out he gave it to me and said "good luck".  From your video I determined that the "dwell" of the exhaust valve was way to much.  I lessoned the dwell by adjusting and shortening the "push rod" and retiming it per your video.  He had adjusted  like you would for a modern engine (to follow the exhaust cam lobe).  I worked perfectly after the adjustment. Thank you again!   Fred  Ontario, NY

Thank you!

Great video sir ! And an awesome explanation of the 4 cycle engine.that degree tool is a great idea and has helped me determine the degrees of ignition and exhaust valve timing on all my Engines.

Hi Mark - Many thanks for an easy to understand explanation. I'm about to purchase a 1/4 scale Red Wing casting kit, so your video has been really useful. Cheers Andrew

watched it again thanks again

Great video buddy. Thank you

Good video to do. You don't know till you know.

10 deg. Is a good place to start because by the time the ignitor spring fires and creates a spark and the fuel mixture in the cylinder ignites the crank will have rotated about 10 deg. Making the power happen at about tdc.

Nice basic explanation of how a 4 cycle engine works, by also describing how a hit & miss engine works. This is probably the first air cooled hit & miss engine I've seen. I'm assuming that's a little cooling fan next to the cylinder, that's being spun off of the flywheel. How much should you pay for one of these small, old hit & miss engines, assuming it's in good running order, but not necessarily 100% fully rebuilt and repainted?

Good video, hopefully I'll be able to get my Galloway running, thanks!

for a great "Finale" you could have run the engine-would have been fun. Anyway, great video...thanks.

BOA EXPLICAÇÃO DO FUNCIONAMENTO DESTE MOTOR, BRASIL OK.

If it is a hit and miss engine, I still don't understand why it doesn't fire on every stroke… Why will it coast for a few revolutions and then fire again?

thank you sir

Hello sr I like the video, and I want thank you for the. Time you put to make all details on the presentation, also I like to subscribe to channel and see if. Later you have. Video on how that igniter works cause I don't see spark plug and coil magneto etc , I like to learn on that 120 year engineer cause it works but I just like to know how work thanks ...