'86 15 HP Evinrude, intermittantly slowed once as if fuel related BUT....

joaklay

Petty Officer 2nd Class
Joined
Aug 21, 2003
Messages
135
This outboard began acting up a couple years ago and although it now seems fixed for the most part, the last time I was at our cabin a few weeks back it acted up for me once (and only once).

What happened was that after using it in shallow water (tilted up in its shallow water position) and using it w/o any problems, I got back onto open water, was going full throttle and it started slowing down as if it was going to die. I closed the choke a bit which got its power back so that tells me that it was running lean for some reason. I tryed squeezing the fuel primer ball while it was acting up, no change. I didn't have too far to go at that point so I just parked the boat at the dock and left it.
The times I used that motor after that, perhaps twice, I had no problems with it was so ever.

Previous fuel related repairs:
Used carb (cleaned out too)
New fuel pump
New gas tank with new fuel line from tank to motor
Has new spark plugs too.

I can't really imagine what else might need attention and I'm thinking that the problem I had MIGHT be heat related but I'm not sure. The outside temps were maybe mid 60s, water temp probably below 60F, the water pump is working (good tell-tale flow).

To be honest, I originally volunteered to try repairing this outboard BUT I'm now seemingly married to it and don't want to be. I'm tired of hearing others complain about it and always needing to fix something with it during my vacation time there. The problem I last experienced with it was so intermittant that even if the outboard was taken to a marine repair place, I highly doubt that they'ld duplicate a problem in a test tank.

Anyone here run into anything similar and have any suggestions that I havent already covered above?
 

fireman57

Captain
Joined
Aug 24, 2004
Messages
3,811
Re: '86 15 HP Evinrude, intermittantly slowed once as if fuel related BUT....

While on tilt you may have had fuel running out of the carb or a stuck float. You might want to dismantle the carb and soak it overnight in a good carb cleaner and blow out every hole you can find with compressed air. Make sure that the vent is open on your tank.
 

joaklay

Petty Officer 2nd Class
Joined
Aug 21, 2003
Messages
135
Re: '86 15 HP Evinrude, intermittantly slowed once as if fuel related BUT....

Thanks for that idea fireman57. I know that no gas was leaking externally but I think it's possible that the float might have stuck from tilting it up.
We're on a lake with many rock bars and we also take this boat through a shallow, weedy stream on occasion to get into another smaller lake so it's tilted up often. It's possible that the carb maybe doesn't like being tilted so much?
If it's an occasionally sticking float, I don't really know what one could do about that.
 

fireman57

Captain
Joined
Aug 24, 2004
Messages
3,811
Re: '86 15 HP Evinrude, intermittantly slowed once as if fuel related BUT....

Once you clean it good and put a kit in it ($20) it should be good for a few years. make sure you run Stabil in it the last time out for the year and it shouldn't gum up.
 
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