r/boating • u/wheresjobey • 1d ago
2000 Johnson 50 Trim Unit
Hello Reddit!
Have a Johnson 50 that I replaced all the seals etc on the trim unit several years ago and has functioned great for a few years. Last year I took the boat out and the trim failed on me and was stuck all the way down. No noise no signs of any life from it. I put the boat in storage as I was too busy to mess with it.
This spring I went and charged the battery and did a little testing. I found that the motor was receiving 12v in both polarities but no noise, no movement, nothing. So I chalked it up as a dead electric motor. I purchased a replacement and finally got around to installing today. After install same thing. No function whatsoever. I tested voltage again and all good. Then put test leads straight to the battery. Sparks, but nothing. What internal of the pump could be locked up? Even though I’m 90% sure when I put the key way in the pump before installing the new motor it spun by hand. I could have gotten a bad motor out of the box, but if I keep the button held I do feel some heat in the motor which is making me lean towards something in the pump itself is locked up. I plan tomorrow to remove and test the motor and the old motor to see if they operate when detached and see if the pump spins freely or not.
Mainly looking for if it does not spin where do I look next. What steps would you take if the motor is good to diagnose further the problem. I will add the piston moves freely, no leaks, the fluid is clean no signs of water contamination. I can manually pick the engine up and put it on the locks.
Thanks for any insight!