R Beddel: Thanks a ton. You're correct, I added an extra "7" in there. Seems it's newer than I was led to believe.
So...MTD. Hmm. Interesting.
This could be electrical as well as a fuel problem. Need more information.
Compression checks out. Its never died outright; only one of the cylinders cuts out. I'm assuming it's a lost spark system, so I should be able to figure out which cylinder it is by yanking a plug wire when its missing. Then swap the wires at the coil and see if it changes. Right?
On to fuel. When it's running on both cyls, it runs perfect. Plenty of power. Idles smooth. Its not acting like a fuel issue. Rich or lean condition should affect both cyls and show up on the plugs?
Doesn't make any difference warmed up or not. Not acting like a valve clearance issue based on my motorcycle repair experience. Those tend to get worse/better as things warm up and the valve stems grow.
Any other info I can post to help with troubleshooting-at-a-distance?
As to the calcium: Uh... how do I get it out? Pull the valve core and drain it?
Leon:
Thanks for the welcome. I'll adjust my profile, but I'm in NE Ohio. Hopefully there are some other Cub owners around. Especially ones who want to get rid of a snowthrower that fits this thing. And maybe give me a hydraulic system off a 782 as a "welcome to the club" gift...
Thanks again,
Ralph
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