Mark Overfelt
Cadet
- Joined
- Aug 4, 2002
- Messages
- 16
I have a 1979 mariner 70 horse outboard. I was flying across a lake wide open, and the motor lost power and died. It restarts every time and idles great, but when I start to give it throttle it boggs down like it's going to stall, but when I back of the throttle It runs ok. I dont know if a weak battery could do that, or some kind of fuel line problem. Or do I need to get my wallet out? Thanks for any and all help. Mark O.
<br />The symptom you describe is fuel starvation.<br />It can have many causes, such as fuel pump, clobgged inline filter, debris in the tank pickup, or in the hose fittings, a clogged jet in the carb, or poor compression.<br />Compression is the logical place to begin looking for your problem.<br />Without adequate compression, the fuel pump (which uses it to operate), cannot operate. Also, without it, fuel won't be drawn in,compressed, or expelled after combustion.<br />So if the compression test passes, move-on the the fuel pump and other suspects.<br />Good luck, and let us know what you have found.