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I think you should be able to wave a metal object past the sensor to create a "test" spark. Have you tried this? What sounds odd to me is the fact that it ran fine before and now it doesn't with either unit. What part(s) is in common with both units? Spark plug Coil Magnet Power Transistor...

Wow! I just read this thread start to finish. Pete, You're very talented. I've learned a lot about thinking "outside the box" from your posts. Thank you so much for all the details and pictures/videos. On the draft question, do you think you could fill the hull with water while measuring the...

I've had this link for more than 10 years now to a unique Stirling engine design that actually has useful power and torque. Maybe some of you have seen this. This guy is from Pescadero, California. I've always meant to try and find/see this machine in person since it's only an hour or two from...

When I made my taper attachment for the lathe, I tossed around different lengths for the sine bar. I finally settled on 28.648" since every degree is 1/2" at that length. My original thought was to make a 20 TPI adjusting mechanism so I could divide the screw dial for easy setting. After using...

John, I'm a little behind you in progress, but I've been working on similar interchangeable items between an indexing head with 1-3/8 8TPI threads and my 39mm by 4mm lathe spindle. I've enjoyed the show and appreciate the shared techniques. I do have a home made taper attachment that allows...

Excellent work Don!

I second the guess. I was viewed the video and thought...thrust related. Then I saw this post. Rich

A little Old School by a high tech guy. What can beat that. My favorite part... the rivet. Rich

I'm curious whether you added anything to prevent the chuck from unscrewing? Your setup is similar to mine but much better in that the plate and threaded collar are all one piece. Mine works well considering the two-piece construction, but I always worry about unscrewing it while machining an...

Wow! Pretty advanced way to go there! I won't pretend to know all about that like I do that every day. Rich

I would think compression ratio, cam profiles, valve springs and carburetion(sizing) would be the main factors once you're sure the flywheel is heavy enough. Rich

Where there's a will, there's a way. Pretty clever setup. Very sturdy too. Rich

Yes, I'll have to ponder some more on how to exploit the new information, but thought I'd post as soon as I noticed it. Rich

Well, I don't know anyone with "unlimited skill" and I wish I had an old lathe with back-gears. I post often and I've yet to build an engine. I definitely have "limited" skills. I like your photographs, good angles. Rich

The red base really sets it off...then I realized it was just a small tin. Funny but it looks good like that. Rich

Hi, I just wanted to pass this on to you guys. I just stumbled on it and some of you may already know this feature. I was fooling around in AutoCad today just curious about planning out moves on a rotary table by using CAD to rotate a drawing like a rotary table simulation. The drawing I was...

Geartooth, I've noticed how your photographs look so clear while mine come out terrible. I'm still using one of our older 2.3mp cameras. I guess I'll have try one of our newer cameras. I'm so stubborn about upgrades and new gizmos. Rich

Yep, Thanks again Paul!

Thanks Paul, I believe mine are correct. If you look at the blade rotation, mine turns clockwise as pictured, whereas it looks like yours turns counterclockwise as pictured. But hey you're right about how important it is to has them pointed the right direction. Also, my saw has a drop-down...

This site has all the tools you'd need to design your replacement gears. They have a downloadable program called "Gearspec" you can use. Good luck, Rich