Anyone out there know about evinrude controls??? would love to get boat back in!!!

[finestkind]

hello i was wondering if anyone new about evinrude controls. my boat sank a month ago, it's running great now as long as i disconect the harness if i plug the harness back in it stalls out. I brought it to a mechanic and he got it going for me and told me it was all set that he fixed the kill switch. well i have a feeling he screwed something up. this mechanic was a nightmare. I told him the boat sunk and after 2 days and three hundred later he said "how much do you want to put into this engine and do you know it has sunk". I told him yes i know it sunk thats why i brought it to you. which i told him on the phone before i brought it to him and told him again, what happened when i dropped the boat off. so i asked why what does it need and he said he's got three hundred into it and it needs a new starter and i told him that the starter is fine i've been jump starting and getting it running by jumping the starter. He then got mad and said " i think i know if a starter is bad i've been doing this for forty years" so i said do wat you gotta do. the following day he said, " well i got good news and bad news, good news is you got a starter for free and bad news is i can't keep guessing what is wrong and putting money into it when i may be wrong." so i asked why i got a starter for free and he told me "my starter was fine and that it was a bad ground." I told you this guy was nuts!!! so the next day i was heading to pick up my boat and he called me and said i'm glad you didn't pick it up cause i thought about it all night and figured it out. "your kill switch was bad and your alarm kept going off because it got fried so i fixed the kill switch and bypassed the alarm." so i said okay what do i owe you? 550 he say's so i was a little annoyed but hell it's fixed and i'm gettting back on the water. so i payed him and picked it up brought it home and nothing. wouldn't run, still messed up. so i started to play with it myself and figured out that when i disconnect the harness it runs beautiful and when i plug it back in it stalls. I'm assuming it has to do with the kill switch but don't know about wiring. I really think it's something simple and would really like to fix it instead of buying a new throttle for 367, so i took apart the throttle and just stare and scratch my head. if anyone has any diagrams or know where i should look them up I'd greatly appreciate it!!!!! I just wanna go back in the water and go fishing before the summer is over!!!! thanks again if you bothered to read my nightmare!!!

thanks again,
Finest Kind
Tom Johnson