Reply To: Mid-1970s 85 HP Johnson Remote Control Problem

[David Stanton]

I took the tilt/trim motor and pump off and found the problem with the tilt/trim.  The end of the motor shaft has flats on each side that mate with the pump.  The flats had been sheared/ground off, leaving just a somewhat circular detail where the flats should be, with only about 1/16th inch of the flats remaining that were  slightly too high to mate withthe pump.  There were metal grindings there.   The pump turned fine each direction and appears to be moving fluid when I turned it with a screwdriver  that was about the size of the flats that were ground off the end of the motor shaft.  The mating area on the pump looks undamaged.  I’m thinking this happened when the pump was miswired to only pump in the down direction, and he said he tried and tried and then the sound of the pump abruptly changed while forcing the down direction.   So – Need another pump motor or a whole Prestolite pump/motor assembly.  I’ll post on the classified board and a couple other places to see if anyone is parting out a motor and has one.  The neighbor I’m helping with this doesn’t want to spend the $$ for an available new, after market trim/tilt  motor if he doesn’t have to.  I’ve found new ones online by Sierra, RareElectrical, and ELM.  (Never heard of RareEelectrical or ELM).

I took the motor and pump off the housing separately.  I looked at removing the whole assembly and got one bolt out, one loose, but can’t see or get my finger in there to feel, the bottom bolt head – looks like I have to take the bottom of the hydraulic cylinder loose and swing it out of the way to get at that bottom bolt.

A few posts back, I think a coupler from motor to pump was mentioned, but there was no coupler there, and none showing in the exploded view at marineengine; and no space to put a coupler.  Maybe I’m remembering that wrong.

Thanks again for all the help!

Dave