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mercruiser alpha 1 outdrive won't lower

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  • mercruiser alpha 1 outdrive won't lower

    just finished replacing my starter and battery. Not sure if it is in any way related, but my outdrive will not go down either by the switch on the control, or the trim switch on the dash. I don't think I disturbed any wires. Any input on how to troubleshoot my problem?

    it's an 87 Larson dc190 with 3.7. If I try raising it, I get a brief whir and then silence, but since it's all the way up already, that may not be a problem, but tells me that controls are working in some way.
    Dave

    87 Sunbird Corsair - sold
    87 Larson DC-190

    Tow vehicle 08 Dodge Ram 1500 Hemi


  • #2
    Re: mercruiser alpha 1 outdrive won't lower

    run a +ve from battery and briefly touch in on the green connection.should go down.if pump works its your connections beforehand.i.e.switch.do you have a multimeter?
    remember ; blue 4 sky = up & green 4 grass = down.
    are you sure the earth connection to the pump is good too.clean and refit.

    Comment



    • #3
      Re: mercruiser alpha 1 outdrive won't lower

      thanks. I'll check it tomorrow. I would now, but its raining AGAIN here in NC. :-(
      Dave

      87 Sunbird Corsair - sold
      87 Larson DC-190

      Tow vehicle 08 Dodge Ram 1500 Hemi

      Comment



      • #4
        Re: mercruiser alpha 1 outdrive won't lower

        hydrolic fluid levels are needed to perform propely...just sayin..good luck

        Comment



        • #5
          Re: mercruiser alpha 1 outdrive won't lower

          it was working fine earlier in the week and has just been sitting in my driveway. Last night I installed the new starter and a battery, and also adjusted my timing, but nothing to do with the outdrive. When I went to lower it, nothing. I'm suspicious that it's the switch in the control. The "up" switch was only raising the outdrive just a small ways, but would not raise the outdrive all the way up. There is a second switch on the dash that I use any time I take the boat out of the water. that switch raises it all the way. The switch on the dash has never lowered the outdrive though. my boat manual only refers to this as the switch for high-tilt or trailering and says not to use it for boat operation in the water. for lowering when putting the boat into the water, I've always used the switch on the control.
          Dave

          87 Sunbird Corsair - sold
          87 Larson DC-190

          Tow vehicle 08 Dodge Ram 1500 Hemi

          Comment



          • #6
            Re: mercruiser alpha 1 outdrive won't lower

            found another thread pointing to mercruiser manual 6 with some troubleshooting info. Hopefully I can figure it out from there. :o
            Dave

            87 Sunbird Corsair - sold
            87 Larson DC-190

            Tow vehicle 08 Dodge Ram 1500 Hemi

            Comment



            • #7
              Re: mercruiser alpha 1 outdrive won't lower

              Originally posted by Old Yeller Boater View Post
              it was working fine earlier in the week and has just been sitting in my driveway. Last night I installed the new starter and a battery,
              If you installed a new battery - make sure you actually got all the wires put back on it. Trim pump usually has its own wires to the battery.
              2012 Malibu VTX 5.7 Monsoon 350HP
              2009 Ram CC 5.7 Hemi

              www.oldjeep.com

              Comment



              • #8
                Re: mercruiser alpha 1 outdrive won't lower

                Originally posted by oldjeep View Post
                If you installed a new battery - make sure you actually got all the wires put back on it. Trim pump usually has its own wires to the battery.
                never hurts to double check. I'll take another look!
                Dave

                87 Sunbird Corsair - sold
                87 Larson DC-190

                Tow vehicle 08 Dodge Ram 1500 Hemi

                Comment



                • #9
                  Re: mercruiser alpha 1 outdrive won't lower

                  ok, I think I have a couple problems going on but scratching my head to figure them out. I cleaned and tested connections on both solenoids.

                  here's how things worked originally - with the outdrive all the way down, the UP on the control would only work a small amount, enough for trimming on plane. Otherwise, the trim switch on the dashboard would raise the outdrive all the way up. For down, the dashboard trim switch would do nothing, but the down button on the control worked.

                  then the down stopped working. Using a jumper, I could override it and lower it directly from the battery. I switched the solenoid and the down now works at the control, but the up at the dashboard trim switch does not.

                  sounds like in addition to the down solenoid being bad, there is something else that was keeping the up switch at the control from working.

                  anyone have any thoughts?
                  Dave

                  87 Sunbird Corsair - sold
                  87 Larson DC-190

                  Tow vehicle 08 Dodge Ram 1500 Hemi

                  Comment



                  • #10
                    Re: mercruiser alpha 1 outdrive won't lower

                    if you have two solinoids they both need to be working.you have a trim limit switch in the drive but they can be sorted later.wires normally corrode.
                    you will need a multimeter to test switches continuity that it is working.sometimes they fall apart inside/oxidize too.

                    Comment



                    • #11
                      Re: mercruiser alpha 1 outdrive won't lower

                      yeah, thinking that. step one is to get the bad solenoid working. One should arrive by Wednesday. After that, I'll go through the troubleshooting guide again. Could be the switch at the control, or the trim limiters. I did carefully take those apart, but they seemed to be in pretty good shape in the inside.
                      Dave

                      87 Sunbird Corsair - sold
                      87 Larson DC-190

                      Tow vehicle 08 Dodge Ram 1500 Hemi

                      Comment



                      • #12
                        Re: mercruiser alpha 1 outdrive won't lower

                        Originally posted by Old Yeller Boater View Post
                        with the outdrive all the way down, the UP on the control would only work a small amount, enough for trimming on plane. Otherwise, the trim switch on the dashboard would raise the outdrive all the way up. For down, the dashboard trim switch would do nothing, but the down button on the control worked.
                        That's the way it is susposed to work and indicates that your trim limit switch is working properly.
                        I have seen this set up where the dash (trailer) switch would lower the drive as well but it is not necessary since the control handle switch will do it just fine.

                        Originally posted by Old Yeller Boater View Post
                        then the down stopped working. Using a jumper, I could override it and lower it directly from the battery. I switched the solenoid and the down now works at the control, but the up at the dashboard trim switch does not.

                        sounds like in addition to the down solenoid being bad, there is something else that was keeping the up switch at the control from working.
                        I don't think there is anything wrong except for a bad down solinoid. When you switched the wires to the solinoids you put the bad solinoid into the "up" circuit. A standard trouble shooting technique is to swap parts and if the problem moves you have identified the bad part. Your problem moved so you have a bad solinoid. Put the wiring back and replace the bad down solinoid and then check the operation before you start changing anything else and create more problems for yourself. If, once the new part is in and the wiring restored, you still have problems THEN continue trouble shooting.
                        Any sufficiently advanced technology is indistinguishable from magic.

                        Comment



                        • #13
                          Re: mercruiser alpha 1 outdrive won't lower

                          absolutely. that's my plan. thanks Dave!
                          Dave

                          87 Sunbird Corsair - sold
                          87 Larson DC-190

                          Tow vehicle 08 Dodge Ram 1500 Hemi

                          Comment



                          • #14
                            Re: mercruiser alpha 1 outdrive won't lower

                            Solenoids arrived yesterday. I got them put in when I got home from work, but no time to really test them out cause I had to head out to my grandson's birthday dinner. I did check the control switches and up and down are both working again. Didn't check the dashboard switch yet.
                            Dave

                            87 Sunbird Corsair - sold
                            87 Larson DC-190

                            Tow vehicle 08 Dodge Ram 1500 Hemi

                            Comment



                            • #15
                              Re: mercruiser alpha 1 outdrive won't lower

                              good to know.

                              Comment

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