Johnson Evinrude Outboard Motors 1956-1970 1.5-40hp repair manual., Page 283Get this manual
MANUAL SHIFT HP TO 25 HP
Standard water pump (left) and new type (right)The newer pump is only used with an updated lower unit
Illustration No.2 If the pin has been driven down into the lower unit housing, it must be drilled out as described in the next paragrphThe accompanying illustration compares proper and an improper installationIllustration No.3 If the pin must be drilled, EXERCISE CARE not to drill to deeplyIf hole is drilled deeper than necessary, then insert couple drops of melted solder into the hole, and set the new pin in place with the LARGE portion of the pin flush with the housingIf the pin is not flush, remove it, drop more soldered into the hole and make another testContinue to drop solder into the hole and test until the pin is flush with the housing when it is installedIf more soldered is inserted into the hole than necessary, the pin may be tapped into the solder while it is still warm and the pin made flush with the housing