1981 Johnson/Evinrude 4HP Outboards Service Manual, Page 68Get this manual
REMOVAL OF WEEDLESS GEARCASE It is possible to remove the gearcase ithout removing the powerhead or exhaust housing
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aRemove the screws attaching the gearcase to the exhaust housing See Figure 6-37 bWithdraw the gearcase carefully to avoid damaging the driveshaft and water tube
Figure 6-31 Gearcase ttaching Screws
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WATER PUMP SERVICE