I have a 1996 Evinrude 50hp 2 cylinder outbaord that has fouled plugs 2 of the last 3 outings. The engine runs superbly until I lose one of the cylinders due to a fouled plug. The fuel/oil mixture is at 50:1. I use the reccomended Champion plugs. I use very inexpensive tc-w3 outboard oil...
