1998 Johnson Evinrude "EC" 90, 100C, 105C, 115, 150, 150C, 175 60 deg. LV Service Manual, P/N 520210, Page 22Get 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 OVIC 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 Running
or storing an engine on leaner than recommended fueloil mixture may result in powerhead damage
INote Avoid the use of the following as they could damage your
engine andor shorten spark plug life: Automotive oils Premix fuel of unknown oil quantity Premix fuel richer than the recommended ratio Premix fuel leaner than the recommended ratio