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Recent content by klc58

  1. K

    Pre-alpha 1 trim pump change

    unfortunately, all the ones they list as "available" require to completely redo the system (including a new gimble housing to allow addition of a different trim position sensor, which is more than I want to do). The "motor & reservoir" only unit does not call compatibility out the "original"...
  2. K

    Pre-alpha 1 trim pump change

    Any suggestions where to find a replacement motor? I found one from DBElectric that is for "pre-alpha 1 mercruiser" and the picture looks the same, but their support says their documentation does not cover my model. Found a few used units online but am reluctant to go that route (since the...
  3. K

    Pre-alpha 1 trim pump change

    I had disconnected the wires and the pump did not run (in either directlon, nothing, no noise or anything), that is why I asked for clarification on how we know which is bad: motor or pump head. Of the images provided, mine is closest to the last one. No plastic tank. All metal. High...
  4. K

    Pre-alpha 1 trim pump change

    IF it doesn't run, how do we know it is the motor and not the pump head locked up? Also, any chance you can find or direct me to a source for the wiring diagram for this pump? I took pics before tearing it out, but missed a couple of important items. (Like where the little blue wire hooks in...
  5. K

    Pre-alpha 1 trim pump change

    Change of focus: how do I determine if the original pump is bad or just the motor? (single solenoid, prestolite model I believe) It looks like I can get motors (upper section) but not the lower, pump section. (I may have jumped to the new pump too quickly, didn't realize the difficulties in the...
  6. K

    Pre-alpha 1 trim pump change

    yes, the pump is powered from the same (always hot) red cable and black ground cable the old pump was. I checked and there is voltage across the unit. Not totally clear how they both work relative to voltages, etc. that is why I was asking for a wiring diagram. I cannot seem to find anything...
  7. K

    Pre-alpha 1 trim pump change

    I did check the fuse, it was good. I tried to jump the solenoids as described, but the plug was still in. I'll try it without. It will be a couple of days though, as the boat is not where I live. The original 1973 888 MerCruiser (302 Ford) had a single solenoid trim pump with a 3-button dash...
  8. K

    Pre-alpha 1 trim pump change

    I have a '73 Searay with an 888 MerCruiser. The power trim pump sounded "different" last year and this year it went down when I put it in the water but wouldn't come up. Since the solenoid operated when I pressed the "up" button (click), I am assuming the motor and/or pump is shot. On top of...
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