Mercury 115hp idles fine, dies when put into gear

[rhotec]

I have a 1993 115hp mercury 2+2, 4 cylinder outboard which idles fine, however when I engage forward gear the motor stalls.<br /><br />I've replaced the fuel line (on board gas tank) ,fuel filter, and spark plugs.<br /><br />Suspect the fuel pump, however, I've been told it could be electrical, fuel pump, broken piston ring, or fuel pump.<br /><br />Any suggestions would be welcome

 

[Solittle]

Re: Mercury 115hp idles fine, dies when put into gear

When you put it in gear try squeezing the bulb. If it keeps running that would point to a fuel delivery poroblem. If so I would start by rebuilding the carbs.

 

[69olds442]

Re: Mercury 115hp idles fine, dies when put into gear

Have you checked for spark? I had a similar problem on my 1987 merc OB, 115 with an inline 6. It had a bad stator.
I first labeled plug wires, disconnected the wires, pulled all the plugs, and then connected my tester to each plug wire and cranked it over for a couple seconds. In my case, all the odd cylinders did not have spark.