Redpackman
Forum Newbie
- Joined
- Jul 28, 2019
- Threads
- 3
- Messages
- 6
I've got an old push mower on a magnesium base. I've got a D-400 engine on it and it's run well. I think the engine was originally a "commercial engine" but of the D-400 variety. It's been acting up lately and today it just died. The compression is good. I've just gone through the carb and it's all clean and working as it should when it was running it was going strong, but then it quit.
No spark.
I thought that it probably needed new points and condenser and was able to find some at an old hardware store that still works on mowers. I went home and installed them. Still no spark.
Coil? I tried testing the coil with a meter. The secondary (the one attached to the spark plug, which I replaced too with a brand new CJ14) has an impedance of around 3.6K ohms. But here's where I have questions. the primary circuit has about .7 ohms resistance out of circuit.
With the coil all hooked up the resistance is the same. Is that right? .7 ohms (seven tenths of one ohm). That sounds powerfully close to a short to me. I've gapped the air gap on the coil using a business card. The magnet in the fly wheel is strong!
No spark
There's no real kill switch connection on this coil. Its the mower which uses the white plastic plunger to prime the carb but it also, when turned clockwise will flip a piece of metal across to a grounding point on a wire to the condenser and short/ground it to stop the spark. I've checked and the wire from the condenser is not grounded directly to ground but it only has .7 ohms resistance, too, of course.
Any help would be appreciated. I've checked that the points are set at .20 and are clean and new. The connection between the ground, the primary wire to the coil and the connector to the points is solid and not shorted to ground, but they only show .7 ohm, again.
Any help would be appreciated!!
No spark.
I thought that it probably needed new points and condenser and was able to find some at an old hardware store that still works on mowers. I went home and installed them. Still no spark.
Coil? I tried testing the coil with a meter. The secondary (the one attached to the spark plug, which I replaced too with a brand new CJ14) has an impedance of around 3.6K ohms. But here's where I have questions. the primary circuit has about .7 ohms resistance out of circuit.
With the coil all hooked up the resistance is the same. Is that right? .7 ohms (seven tenths of one ohm). That sounds powerfully close to a short to me. I've gapped the air gap on the coil using a business card. The magnet in the fly wheel is strong!
No spark
There's no real kill switch connection on this coil. Its the mower which uses the white plastic plunger to prime the carb but it also, when turned clockwise will flip a piece of metal across to a grounding point on a wire to the condenser and short/ground it to stop the spark. I've checked and the wire from the condenser is not grounded directly to ground but it only has .7 ohms resistance, too, of course.
Any help would be appreciated. I've checked that the points are set at .20 and are clean and new. The connection between the ground, the primary wire to the coil and the connector to the points is solid and not shorted to ground, but they only show .7 ohm, again.
Any help would be appreciated!!
