georgia-dawg
New member
I'm working on a friend's 115 (serial OG213348)and while familiar with OMCs, my experience with Mercs is limited. The engine idles like it is missing a cylinder yet a timing light shows good even fire across the plugs (new plugs, wires and fuel filter.) It was barely idling at 250 rpm, I idled it way up to 600 but the idle is very rough. The engine lacks the power to stay running when put into gear in the water (will stay running out of the water.) It has sat for a while so I ran it on a jug of fresh gas for a while with no change. A can of carb cleaner netted no real change. The fuel bulb stays firm and pumping it does not change the idle or run (thought the fuel pump might have had a tear/hole.)I pulled the plugs and they appear to be burning equally and were wet. Any other ideas?