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Message: <blockquote data-quote="FuzzyGrub" data-source="post: 522191" data-attributes="member: 3438">A good number of years ago, had a 1977 35HP Johnson.  It died prematurely, due to an earlier life in salt water.  My memory from working on it is quite faded.  I do believe there was a rubber grommet that the copper pipe fits into.  Finding a full schematic for your motor should tell you for sure.  Typically, running on muffs, pressurizes the water upto the powerhead, and masks problems with the impeller pump.  So, if the pipe is fitted correctly, the water passageways in the powerhead maybe blocked with the remains of the old impeller.   With the lower unit off, and in neutral, you should be able to wrap a strap wrench around the drive shaft and manually spin it fast enough to get water out the top of the tube.   Need two people or a makeshift stand that can keep it upright in a big enough bucket.</blockquote>