9U Mag- no spark

Drag a piece of sand paper across both moveable and stationary point surfaces, then recheck the point gap. Just had to do the same to my hand crank John Deere this day, after sitting out over night.
Ed

Yup, that's the plight of breaker point ignition....seems like it's always one or the other needing it's points filed. You can do a continuity check across closed points but you will have to lift the wire off the terminal in the left hand upper corner for that test to work.

Since your condenser was under water for a good soaking, I am sure that it is now shorted. Replace the condenser in the mag for a better chance of making spark again. As a kid I had an old Evenrude twin outboard on the back of a plywood boat. Everytime that I turned my back on it, it seemed like, the boat would sink. And everytime that it went under for more than just a quick dip, I had to replace the condenser to get it to spark again. The old Evenrude still runs to this day.😊

Rather than spraying WD 40, get a can of electrical cleaner and give it a spray with that, then leave the light bulb close enough to get everything totally dry. Points and condensor have already been mentioned but you might also check the cap for carbon tracking. As it was running some time ago it's doubtful that could be a problem but clean and check anyway. Also, do a continuity check on the "kill" switch. .I've seen 'em go bad.

After doing all the above and if still no spark you might find a way to turn the mag over for a while. On a 2U, I have pulled the spark plugs, hooked up a 1/2in. milwakie drill to the starting crank shaft by means of sockets and reducers and spin the pony moter for a min or so with the plugs plugged in and grounded to the block and they start firing. Reinstall plugs and go. Be sure the gas is off or things could get hotter than you want.

Ok thanks guys. I played with it a little bit tonight- sandpapered the points. Still no spark. I can see spark between the breaker points when I turn it over without the cap on, but no spark to the plug. I checked the plug on another motor and it has spark. I also tried a different plug wire that I know was good. Still no spark. I did get a small shock when turning it over and holding onto the mag cap. There is no kill switch on this pony- I always kill it by turning off the gas. I guess it just must be time for new points and condensor. Do the small tube shaped contacts that attach to the springs in the cap come with a points or tune up kit? I managed to break one of the three today when cleaning them up. Thanks again.

anybody have the part numbers for my points, condensor, and the contacts between the cap and rotor? Any good sources for these old parts? Thanks.

anybody have the part numbers for my points, condensor, and the contacts between the cap and rotor? Any good sources for these old parts? Thanks.

4f2302 brush 3
5f7881 condenser
4f2283 breaker assembly

Check with CAT first and see what they have and prices. I would bake the magneto for sure before replacing anything other than the condenser. If you are seeing a spark on the points, they're doing what they need to do. As has been mentioned before, check for spark tracking in the cap and rotor and replace the condenser. The value of these isn't usually that critical, if you can find one that will mount up from someplace local it should work.