115 Mercury died

[Madhawk]

hi i have a 86 Glastron Carlson CVX16 with what i am guessing is a 86 115 Mercury inline 6. I just got the boat yesterday and took it to the gorge to try to give it a shot. Well i got it there and put it in the water took a minute to get it to start. Once I did, the boat seemed to run great ran it for 5 minutes or so. Then headed for shore to pick up a couple of people to go for a ride. Once i shut it down and tried to start it back up I couldn't get it to fire back off. The bottom carb looked like it was flooding out. We pulled the plugs and they were a bit wet. Dried them and blew the cylinders out. Still no joy. So I called the guy I bought it from and asked him if he had any troubles with it. He said it ran fine for him, but what he forgot to tell me he had winterized the boat. I am thinking that he must have put a ton of Stabil or something in it when he did. I drained the tank and put new gas in today. Also i bought the boat in Salt Lake area and then brought it back to WY where our elevation is about 7000 feet or so. So I am wondering if i should even try taking it back to the Gorge or should I have new jets put in for this area or should it make a diff enough to matter. I am thinking that the fuel must have been bad because it ran like a scaled monkey when I did have it going. It was just when I shut it down to come into shore that I had problems. Thoughts or suggestions would be great.

 

[hkeiner]

Re: 115 Mercury died

It could be dirty carbs, incorrectly adjusted carb floats, leaky carb float valves, etc. Since the motor is new to you and you may not know the maintenance history, I would suggest first cleaning the carbs, replacing and adjusting the carb floats/valves to spec, and doing a link and sync. The high speed jets may be fine but the low speed idle jets and/or low speed air passage ways could be plugged

I have a hard time starting my carbed 150HP motor when it is WARM if I do not move the throttle a little forward (while still in neutral gear) when cranking. This opens the throttle plate a little and gives the motor some extra air and avoids flooding. Once the motor starts, then I back off on the throttle to the neutral throttle position.