1650 dies when it heats up.

[R Bedell]

The proper plug gap is:

Battery Ignitions = .035"

Magneto Ignitions = .025"

It has always been that.

[teejk]

I'll have to look again...did CC make a 1650 in magneto? otherwise I think the CC manual says .025 and my old 1250 (now actually a 1650 I guess since I replaced an abused K321 with a K341 about 20 years ago) runs much better at the .025 gap.

I replaced the carb and points and was still getting heavy carbon fouling (Champion H10C that I have always used since that is what the new motor came with)...goofy operation when warm and spit/pop/backfired on shutdown.

Now reading here I see that people tend to gap points at .018...I went the .020 as instructed. If I get the same result, it's a lot easier to gap the plug than those points (takes an hour to just get the cover on and off after searching for the dropped screws!).

[ajgross]

If you set the points at .020 or .018, I would be money that they are not correct. To properly set points, you need to either use a timing light or set them with a multimeter.

To me it doesn't sound like a ignition problem. It sounds like you have a exhaust valve sticking. Happens all the time and is very easy to correct. All you need to do is add a cap full of Marvels Mystery Oil to the gas tank every time you fill it up. That should help lubricate the valves and keep them from sticking.

AJ

[teejk]

ok then! but I have a timing light and danged if I can find a timing hole to point it at. this is a replacement motor bought probably in 1991 or so (K341). I have an access hole on the blower housing (carb side) which really only shows the gear teeth on the flywheel. I also have a hole on the starter side looking back towards the seat that looks like it was carved by a beaver.

Lights out and a flashlight in hand there is no "timing mark" that I can find (other than where I would expect to find one based on where the points open I see what appears to be a silver "dot" on the forward face of the flywheel when viewed from the starter side and looking towards the seat).

If that is the timing mark and I am supposed to set those points, where they can't really be set since they on rely on a simple screw on the other side of the motor that can move if somebody slams a door, and I am supposed to time it where a timing mark appears in the middle of a hole that looks like a beaver chewed it out, think I'll stick with static timing.

[mrcubcadet]

Originally Posted by ajgross

To me it doesn't sound like a ignition problem. It sounds like you have a exhaust valve sticking. Happens all the time and is very easy to correct. All you need to do is add a cap full of Marvels Mystery Oil to the gas tank every time you fill it up. That should help lubricate the valves and keep them from sticking.

AJ

I have to agree. I had a Case 220 with a K241, and it was doing almost the same thing after running it for no longer than 5 minutes, many times sooner.



I sold it, but am almost positive that that is what the issue was..As I had done almost everything else possible.

[R Bedell]

did CC make a 1650 in magneto?

NOT for Cub Cadet.