610 dying on me

[TireChanger]

I have a 1970ish 610 with the wisconsin gas engine. 3 weeks ago my neighbor payed me 100$ and a case of beer to spread one dump truck load of gravel for him. Kick ass, huh? Took me about 2 hours and ran fine the whole time. 2 weeks ago, I was digging a little dirt and it shut off on me. I let it sit a little while, thought about it, and developed a hypothesis that it was something electrical. So since I had a spare coil laying around, I changed it and it fired right up. So I double checked it, put the old one in, and it fired back up again. And today it did the same thing again. Today I noticed it did it under a strenuous load (big rocks, lots of clay). I'm thinking distributor, or maybe even a bad ground?

 

[7LBSSMALLIE]

youre over thinkin this. first off 610 should be in a musemean.not moving dirt..hold coil wire in hand and see if boot fils with piss? seriously rebuild carb float is stickinng. ask old machinist for advice, if compression is good these old ones can still be .dialed in to perform, a little massage so to speak this an art the guys who can do it.tweaking carbs and govs to match eng wear.arent around any more.start with factory spec and dial in. it hasent changed

 

[TireChanger]

youre over thinkin this. first off 610 should be in a musemean.not moving dirt..hold coil wire in hand and see if boot fils with piss? seriously rebuild carb float is stickinng. ask old machinist for advice, if compression is good these old ones can still be .dialed in to perform, a little massage so to speak this an art the guys who can do it.tweaking carbs and govs to match eng wear.arent around any more.start with factory spec and dial in. it hasent changed

I failed to mention, I pulled a spark plug wire off and had no spark. And after exactly one beer it would fire back up. That's why I believe its heat related. Something is expanding and not making contact.

 

[Buster F]

I failed to mention, I pulled a spark plug wire off and had no spark. And after exactly one beer it would fire back up. That's why I believe its heat related. Something is expanding and not making contact.

I had a similar problem with my 630 recently - turned out to be the points. Might be a good place to start.

 

[OldMachinist]

I had a similar problem with my 630 recently - turned out to be the points. Might be a good place to start.

On some Wisconsin engines there's a safety switch on one of the heads and if it gets too hot it grounds out the coil. Easy way to tell if yours has the switch is if you have a extra wire coming off the coil that goes into the sheet metal shrouding. If the switch is cutting off the ignition you need to remove all the sheet metal and clean the cooling fins.
Next thing to do is a complete tune up(points, condenser, wires, coil and spark plugs)

 

[mechtech]

On some Wisconsin engines there's a safety switch on one of the heads and if it gets too hot it grounds out the coil. Easy way to tell if yours has the switch is if you have a extra wire coming off the coil that goes into the sheet metal shrouding. If the switch is cutting off the ignition you need to remove all the sheet metal and clean the cooling fins.
Next thing to do is a complete tune up(points, condenser, wires, coil and spark plugs)

I upgraded my M-610/Wisconsin engine with electronic ignition
not hard to do, now I won't have to worry about the points, condenser, etc.......
if you need manuals let me know.
Good Luck