1980 Johnson 4HP Service Manual, Page 73Get this manual
pressure to 16-18 psi (110-124 kPa)If pressure does not hold, submerge gearcase in water and check for source of leakageMake necessary repairs and repeat testScrew in vacuum testerPump out to 3"-5" of mercury and see if vacuum holdsThen pump out to 15" of mercury and checkIf gearcase fails to hold either test, put oil around suspected sealIf leak then stops oil is drawn inthat seal is defectiveWhen gearcase checks out refill with lubricantSee Section Lubrication ChartReassembIe propeller slip clutch without lubricantApply light film of Triple Guard Grease to the propeller shaft and install the peller, using new drive and cotter pins Figure 6-18), and install exhaust housing assemin swivel bracketApply bead of Adhesive to surfaces of swivel bracketSee Figure 6-18Oip swivel bracket attaching screws in Gasket Sealing Compound and install aft half of swivel bracket Tighten screws to specified torque
REASSEMBL OF GEARCASE EXHAUST HOUSING
Attach gearcase extension, if used, to exhaust housing with screws dipped in Gasket Sealing Compound Tighten to specified torque Lightly lubricate upper and lower pivot bearings with Triple Guard GreaseAssembIe upper and lower pivot bearings and dampeners to exhaust housing as shown in Figure 6-17 Slip dampeners over bearingsPlace swivel bracket friction bIock in place (see