1993 Johnson Evinrude "ET" 9.9 thru 30 Service Manual, P/N 508282, Page 19Get this manual
Gearcase Gear Ratio Lubricant Capacity Shift Rod Height 13:28 (0.46) 25 Comm 2812:21 (0.57)
OMC Hi-Vis Gearcase Lubricant
11 flo oz(330 ml) 25 Comm 28flo oz(245 ml) See Page 6-32
Ignition System ._ Type Power Pack RPM Limit Ignition Coil Magneto Powered Capacitor Discharge 20-30 Rec- 61 00 25 Comm- 5700
OMC PIN 582508
Spark Plug, Champion Sustained High Speed 0L16V Fixed Gap OL78V Fixed Gap
Model 20, 25 28, 30 25 Comm
Recommended OL77JC4 0.030 in(0,8 mm) OL16V Fixed Gap
Alternate L77JC4 0.030 in(0,8 mm) L16V Fixed Gap