engine swap... question about diode...
Hi, I just swapped a older Briggs12hp into a newer (09?)Murray Select that had a 17.5 briggs. I got the Murray for 100 bucks w/o the engine. The rest of the tractor appears to be new. I spliced into the newer wiring that came with the Murray.
It runs fine but it blows the ignition fuse either after it starts or when I shut it off. (i don't know which). I put in a new fuse and as long as i don't shut it off i can cut the lawn. However I'm using a lot of 15 amp fuses.
I did some thinking on it and found that i had inadvertently cut off the diode on the red wire coming out of the stator on the 12hp while splicing in the wiring.
What does this diode do and could it cause the ign fuse to blow?
Also the Murray has a grey wire which used to run to a 'anti-backfire' device. I just left it dangling - it isn't touching anything.
Thanks for any advice!
PS - I'm impressed how well the 12hp performs in the newer tractor.