First of all thanks to everyone . I have had this motor since 2000 and its been great. Very few problem until now. Early spring I replaced the oil lift pump and the engine has been running strong . Yesterday took the boat out and would only run up to 4200 rpm. The engine sounds fine. When I had the boat on the trailer . I could rev the engine in neutral all the way up to 5500 rpm.
I pulled all spark plugs and number 2 was wet , all the others looked fine. While running the engine, I pull the plug on #2 and no change in rpm. Did the same on the other spark plugs and the rpm would drop. Replaced #2 spark plug, no change.
How do I confirm if I have a bad coil or bad spark plug wire?
E200FPLEEN
4712814
500 hours
Thanks
Chuck