Re: 1974 johnson 70hp stator?
That pictured stator with the exposed coils is the original stator that the engine is equipped with when sold new. The newer ones are completely shielded with epoxy.
The black coils provide power to the powerpack, needed to energize the ignition. When those coils melt down, it results in a voltage drop which will in turn result in weak, erratic, and eventually no ignition.
Replace the stator!
Note: It's possible that a shorted rectifier has failed which would cause voltage to back up at the stator. This would result in having the stator overheat. Check the rectifier as shown below.
(Small Rectifier Description & Location)
(J. Reeves)
On most 2,3,4,6 cylinder engines, the small rectifier is located on the starboard (right) side of the engine just in front of the engines electrical wiring strip. There are a few older V4 engines that have the wiring strip on the rear portion of the engine and the rectifier would be located just under that terminal strip. The smaller horsepower engines usually have the rectifier located on the starboard side of the powerhead close to the carburetor area.
The rectifier appears to be a round object approximately one inch (1") in diameter and also about one inch (1") high. The base of it is sort of triangular in appearance and is attached to the engine with two (2) screws/bolts..... usually one screw/bolt is larger than the other. The rectifier, depending on which one your engine uses, will have either:
One Red wire, one Yellow wire, and one Yellow/Gray wire, or One Red wire, and two Yellow wires.
Note that either of the above rectifiers could have a fourth wire which would be Yellow/Blue
i just noticed recently that i have some brown sticky stuff dripping from the bottom of my stator coils