1998 Johnson Evinrude EC 50 thru 70 HP 3-Cylinder Service Manual, Page 16Get this manual
Fuel System FuelOil Ratios Fuel Requirements Carburetion Calibration Initial Low-Speed Setting Starting Enrichment Float Level Setting Float Drop Setting See Page 1-16 See Page 1-18 Three Single-Throat Carburetors, Float Feed
Adjustable Low Speed, Fixed Intermediate and High Speed