1990 Johnson Evinrude "ES" Colt/Junior thru 8 Service Repair Manual, P/N 507870, Page 160Get this manual
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Installation of PowerheadDeluxe
1 Remove gearcase from exhaust housing
2 Lubricate end of water tubeAssemble the powerhead to the exhaust housingTighten the screws to torque of 60-84 inIbs