1998 Johnson Evinrude "EC" 40 thru 55 2-Cylinder Service Manual, P/N 520206, 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 labelINotel Running or storing an engine on leaner than recommended fuelloil mixture may result in powerhead damageI Note Avoid the use of the followi ng as they cou Id da mage you engine andlor 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