1998 Johnson Evinrude "EC" 9.9 thru 30 HP 2-Cylinder Outboards Service Manual, Page 26Get this manual
FuelOil Ratios Lubricant
Only the following lubricants should be used:
Evinrude TC-W3 Outboard Lubricant Johnson TC-W3 Outboard Lubricant
These lubricants are formulated by OMC to give best engine performance while: Controlling piston and combustion chamber deposits Providing superior lubrication Ensuring maximum spark plug life If Evinrude or Johnson Outboard Lubricant is not available, another NMMA certified TC-W3 oil may be usedLook for the certification information on the container label
INote Failure to follow this minimum lubricant recommendation
could void your engine warranty
INote Running
or storing an engine on leaner than recommended fueloil mixture may result in powerhead damageengine andor shorten spark plug life: Automotive Premix fuel Premix fuel Premix fuel oils of unknown oil quantity richer than the recommended ratio leaner than the recommended ratio