Hi. I have a three year old B and D electric corded lawn mower MM275 that wont start. I replaced the rectifier and it ran for a while and stopped. I tried another and it did the same thing. I got a new switch and rectifier and now it trips the circuit breaker. I'm sure everythings wired right. This started after I ran over a part of a tree branch I didn't see. Everything inside looks and smells OK. The blade turns by hand with no problem. Is the motor shot and I need a new mower? Thanks for any advice.
