Open Column Twin IC Engine

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cfellows:
I'm happy to report that the misfiring cylinder has been corrected. I pulled the plug and there was virtually no gap. So I widened the gap to about .035", reinstalled the plug, and the problem was fixed. Why don't I ever check the easy (and obvious) things first??? :doh:

It's still not running as consistently as I'd like, so I have some more work to do. But it does idle pretty slow and will keep running slow for quite a while. One problem with the vapor carburetor is that the mixure keeps getting leaner as the fuel level drops. So, you have to keep adjusting the fuel mixture.

The other issue I have is way too much lift on the cams, about 0.125". I can compensate for that by adjusting the valve clearance extremely loose, but it makes the rocker arms look sloppy and I really only need a lift of about .060". I may remove the cams and take them down a bit.

And, of course, I still have to put everything in a more permanent and attractive package. That means building a base, a mount for the gas tank and a nice enclosure for the electrics along with safer and more attractive routing for the wiring. Stay tuned...

Chuck

cfellows:
Here's another short video showing the state of the engine as of this morning. You can see the taller vapor fuel tank, the larger flywheels, and the better, slower idle. Still not running very smooth, but at least it's missfiring equally on both cylinders. The sound is kind of a cross between a John Deere and a Harley!

http://www.youtube.com/watch?v=nfe9sE1RdZ0

Chuck

cfellows:
OK, sorry to keep flooding you with videos, but this is the final one until I get the engine prettied up with a base and proper placement and connection of all the odd bits.

This video sounds pretty much the way I had originally hoped for. All I did was basically open up the throttle some then use friction drag on the flywheel to slow it down. Seems to do the trick.

http://www.youtube.com/watch?v=jAE9En2xsZg

No more videos for awhile... ::)

doubleboost:
Video is always welcome to me :thumbup: :thumbup:
That engine has a nice sound to it
You must have similar wear resistant skin on your hands as me :bugeye: :bugeye:
John

cfellows:

--- Quote from: doubleboost on July 04, 2011, 05:52:43 PM ---Video is always welcome to me :thumbup: :thumbup:
That engine has a nice sound to it
You must have similar wear resistant skin on your hands as me :bugeye: :bugeye:
John

--- End quote ---

Thanks John! Not sure if the hands are wear resistant or just numb from all the abuse over the years.

Chuck

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