1990 Johnson Evinrude "ES" 9.9 thru 30 Service Repair Manual, P/N 507871, Page 236Get this manual
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I nstallation 1models with gearcase extension Iit, make sure the driveshaft tube extension, water tube extension, and gearcase exhaust seals in place 14612 Coat the driveshaftthe driveshaft as splines