Optimax issues

[Flygaff]

I went out Sat AM with no issues. Just as I arrived back at the marina my port engine stalled. I didn't think anything about it and docked and cleaned the boat. Sunday morning I went down to go out. The port engine was completely dead. No power at all. checked batteries and everything good. After a little digging around I found a blown 20 amp fuse on the engine. I replaced the fuse and tried again. The motor turned over but would not fire. As soon as I let go of the key the fuse blew again. Tried with another fuse, same thing. Engine turned but would not fire. so now I am looking into the key switch itself. I hope this is the issue. it would be the fastest and most cost effective solution. ANY IDEAS?

Thanks

P.S. I caught 15 fluke in three hours - No keepers

[jimmythegreek]

when the 20amp fuse blows its cause of a dead short somewhere, thats the initial protection on the eletrical side of an opti. there are other fuses behind it as well. what size opti is it and what year? the easiest way to check the key switch is to use a meter and check for continuity. Dont know how your boat is laid out but I have used the existing harness and switched it to the other side before to rule that out. Most optis 07/08 newer use the 14pin connector its pretty easy to fish out from the side cover if you have slack you can unhook bad side and try w the other side key/harness and then you know for sure

[Flygaff]

Thanks for the information. I replaced the entire harness and switch. It seems to have resolved the issue. I hope.