2004 SR Johnson 2 Stroke 9.9, 15, 25, 30 HP Outboards Service Manual, Page 16Get this manual
INTRODUCTION SYMBOLS When "n" follows value on the meter face, the procedure is measuring resistancen is the symbol for ohmthe unit of measurement for resistanceWhen "2" precedes value on the meter face, it indicates your reading must be greater than, or equal to, the value shown