I have a Mercury 115 OB,
I have been having issues thought it was lowerend, then fuel, went on to spark.
the issue is runnig at river runs idles great, when i punch it falls on its face turn off all power but the motor then takes off. but dosent sound like its running full power only getting about 30 instead of 50s, i noticed this after turnning off stereo.
so I think its Charge issue, then a budy tells me of a freind same issue, and it turns out Recifier. not getting enogh power to motor.