I have an 18.5' sea nymph with a 50 HP evinrude and this thing is gonna either give me a heart attack or stroke me out before it's over with. 
I fought an intermittent spark condition all last year. Ruled out the kill switch last year by trying it with the main harness unplugged. I got out there today with my OMC book and decide to dig into. I took one of the amphenol (sp?) connectors off to check the kill switch again just to be sure and I have spark back again. I was thinking it was going to end up being the power pack or something under the flywheel but I think I've ruled that out because once you get spark it runs like a top. Then out of the blue it'll stop getting spark. I'm now thinking I probably have a chaffed wire somewhere that's grounding out and killing the spark because that's essentially what the kill switch does, it just grounds the spark. I've also blown the 25 amp fuse on the back of the engine a few times the last 2 seasons when I've been having this issue. I'm going to go out there and start it everyday this week until I loose spark and then I'll try turning it over at night and see if I can see it arcing. I'm ready to go fishing so I want this thing running soon. Don't trust it enough to take out right now.
I fought an intermittent spark condition all last year. Ruled out the kill switch last year by trying it with the main harness unplugged. I got out there today with my OMC book and decide to dig into. I took one of the amphenol (sp?) connectors off to check the kill switch again just to be sure and I have spark back again. I was thinking it was going to end up being the power pack or something under the flywheel but I think I've ruled that out because once you get spark it runs like a top. Then out of the blue it'll stop getting spark. I'm now thinking I probably have a chaffed wire somewhere that's grounding out and killing the spark because that's essentially what the kill switch does, it just grounds the spark. I've also blown the 25 amp fuse on the back of the engine a few times the last 2 seasons when I've been having this issue. I'm going to go out there and start it everyday this week until I loose spark and then I'll try turning it over at night and see if I can see it arcing. I'm ready to go fishing so I want this thing running soon. Don't trust it enough to take out right now.
