[Seabees]

Ive got a new problem that has me stumped.
I fueled up my 128 to mow the back yard and I restarted it.
The starter/generator stayed as a starter and the battery wire to the V/R started smoking. I disconnected it before it did any damage.
I replaced the V/R and now when ever I put the battery wire on the post, my starter turns over even if the key is in the off position.
I suspect a direct short inside the S/G.
Any suggestions before I start disassembling S/G