1976 Evinrude 9.9 HP Service Repair Manual Genuine Models P/N 5188, Page 83Get this manual
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3 Fill gearcase with Sea-Lube Gearcase LubeSee Figure 6-61 and Section 2, page 2-4 for proper filling procedure
FRICTION ADJUSTMENT
Use 916 wrench to tighten the tilt shaft nut only