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QuickSilver Dual Controls - Shift Interuppter Issue ???

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  • QuickSilver Dual Controls - Shift Interuppter Issue ???

    I have the QuickSilver Dual Controls on my boat, which I absolutely hate . . .
    Click image for larger version

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    They are showing their age, and today I noticed what could be a growing problem. . .

    Cruising along at about 3400 RPM ( 38 mph) I noticed that when I put my hand on the control to adjust it slightly the RPM of the starboard engine suddenly dropped, like the engine had been shut off. I quickly removed my hand from the control and the RPM popped right back up and resumed as it was. All this was in about 2 seconds time. If I bumped the controls or moved them more deliberately, everything was fine. It seemed if I lightly touched the control lever the RPM thing would happen. . . this happened 3-4 times. So, I just left the throttles alone for the most part.

    I was going to try a WOT run, because the bay was flt, but I did not want to risk having an engine suddenly shut down at WOT . . .

    So, this got me to thinking, is the shift interrupter on the starboard control starting to get flakey? Is there a way to test this? Or maybe inspect it for wear?

    Since I am not a fan of these controls ( I had the Kiekhaefer/Mercury Racing controls on my last boat) I am wondering if I should just upgrade to a set of performance controls with separate gear shift and throttle levers.

    Not sure what all will be involved in upgrading. Would I still be able to use the same set of cables that run to the engines? I don't want to open a can of worms during the season. So, I am wondering if I can easily diagnose the existing controls to get them through the season or should I just upgrade to new controls? (If it was a slam-dunk)

    T.I.A. for any guidance on this.
    Best regards, Ted . . . . Cape Cod, MA

    Formula 330 Sun Sport, O'Day Mariner Sail #3224, Sunfish
    Past Boats: Catalina 22 Sail #10531, Formula 242 Sun Sport
    Twin Mercruiser 7.4 LX MPI (0F802036, 039), Bravo 3's (0F806198, 199), Mercury 7.5 HP (1969), Johnson 4.5 HP (1980)

    My Boating Web Pages: http://www.tpenfield.com

    Member of the Month - February 2013

  • #2
    once you shift into gear the interupter only should work coming out of gear. Once shifted into gear and using the throttle the shift control does not move
    so the interupter does not move either.
    NO PERSONAL QUESTIONS, THIS IS WHAT THE FORUM IS FOR.

    Comment


    • #3
      Originally posted by Bt Doctur View Post
      once you shift into gear the interupter only should work coming out of gear. Once shifted into gear and using the throttle the shift control does not move
      so the interupter does not move either.
      Yes, I am just wondering if the interrupter switch is no longer working as it should

      After a little bit of research it looks like I have Mercury/Quicksilver Control # 88688A23. The interrupter seems to be a 'micro switch' P/N 87-817724 ? Maybe those are starting to wear out or the wiring is becoming shorted out.

      I guess I can check to see if the micro switches are OK.

      Also, It looks like I could get the Mercury Zero Effort dual control for around $1,300 . . . Just not sure how easy an upgrade would be.
      Best regards, Ted . . . . Cape Cod, MA

      Formula 330 Sun Sport, O'Day Mariner Sail #3224, Sunfish
      Past Boats: Catalina 22 Sail #10531, Formula 242 Sun Sport
      Twin Mercruiser 7.4 LX MPI (0F802036, 039), Bravo 3's (0F806198, 199), Mercury 7.5 HP (1969), Johnson 4.5 HP (1980)

      My Boating Web Pages: http://www.tpenfield.com

      Member of the Month - February 2013

      Comment


      • #4
        Ayuh,..... I thought the Bravos didn't use the interrupter switch,..??

        Comment


        • #5
          Maybe not, but if not, I guess I might be chasing an electrical connection issue. The main thing that is pointing to the shifter is that it happened when I was touching the throttle lever.
          Best regards, Ted . . . . Cape Cod, MA

          Formula 330 Sun Sport, O'Day Mariner Sail #3224, Sunfish
          Past Boats: Catalina 22 Sail #10531, Formula 242 Sun Sport
          Twin Mercruiser 7.4 LX MPI (0F802036, 039), Bravo 3's (0F806198, 199), Mercury 7.5 HP (1969), Johnson 4.5 HP (1980)

          My Boating Web Pages: http://www.tpenfield.com

          Member of the Month - February 2013

          Comment


          • #6
            Its warning you to slow down or the lever is afraid you will do something drastic like go full throttle
            NO PERSONAL QUESTIONS, THIS IS WHAT THE FORUM IS FOR.

            Comment


            • #7
              Originally posted by Bt Doctur View Post
              Its warning you to slow down or the lever is afraid you will do something drastic like go full throttle


              If I get really bored, I may pull the control unit out for a look. Otherwise, I'll see if the problem continues or even worsens.
              Best regards, Ted . . . . Cape Cod, MA

              Formula 330 Sun Sport, O'Day Mariner Sail #3224, Sunfish
              Past Boats: Catalina 22 Sail #10531, Formula 242 Sun Sport
              Twin Mercruiser 7.4 LX MPI (0F802036, 039), Bravo 3's (0F806198, 199), Mercury 7.5 HP (1969), Johnson 4.5 HP (1980)

              My Boating Web Pages: http://www.tpenfield.com

              Member of the Month - February 2013

              Comment


              • #8
                the wiring contained inside the control box only controls the neutral safety switch to prevent starting in gear. It is wired to the yellow/red that goes to the slave solenoid.Simply moving the throttle handle and losing an engine could be a wire that has chafed on the control cable or harness.The purple wire under the dash supplies power to the ign system. Loose ign switch wires ?
                NO PERSONAL QUESTIONS, THIS IS WHAT THE FORUM IS FOR.

                Comment


                • #9
                  Update:

                  I had the boat out today and it ran fine for the short trip that we took. Anchored near shore. I went to move the boat out as the tide was receding . . . The starboard engine would not even trun over. I checked a bunch of things and then finally pushed in the kill switch while turning the key and the engine cranked over and started.

                  So, I think my issue is the kill switch is becoming corroded. I'll put that on the short list for the off season,
                  Best regards, Ted . . . . Cape Cod, MA

                  Formula 330 Sun Sport, O'Day Mariner Sail #3224, Sunfish
                  Past Boats: Catalina 22 Sail #10531, Formula 242 Sun Sport
                  Twin Mercruiser 7.4 LX MPI (0F802036, 039), Bravo 3's (0F806198, 199), Mercury 7.5 HP (1969), Johnson 4.5 HP (1980)

                  My Boating Web Pages: http://www.tpenfield.com

                  Member of the Month - February 2013

                  Comment


                  • #10
                    Ayuh,.... Great find,....

                    Comment


                    • #11
                      Update:

                      Well, not out of the woods yet . . . I was chasing gremlins that past couple of days.

                      Symptoms are split second power loss while running ( I mostly notice it around 3500 RPM's )

                      Today after running for a while and anchoring, the starboard engine would not crank the starter. Ignition power seemed to come on, I got the beep that I usually get and the gauges came on, but when I turned the key all the way to start - nothing, nada, zippo. I messed with the shifter, still nothing. I pressed in the kill switch as I had done before, nothing. Then after about 5 minutes the starter worked.

                      I anchored again after a short cruise, and the starter engaged right away this time.

                      While cruising back to home port, I could feel the engine (s) cut out for a split second . . . you could really feel the loss of power when it did it. happened a few times on a 5 minute run.

                      I also notice that the engines sometime stall when at idle and maneuvering through the harbor (warm/hot engine)

                      So, I'm thinking it is electrical, but have quite a few things to check . . . ignition switch, engine connector, MEFI connectors, throttle/shift controls, kill switches,

                      anything else or other ideas
                      Last edited by tpenfield; August 28th, 2017, 05:07 AM.
                      Best regards, Ted . . . . Cape Cod, MA

                      Formula 330 Sun Sport, O'Day Mariner Sail #3224, Sunfish
                      Past Boats: Catalina 22 Sail #10531, Formula 242 Sun Sport
                      Twin Mercruiser 7.4 LX MPI (0F802036, 039), Bravo 3's (0F806198, 199), Mercury 7.5 HP (1969), Johnson 4.5 HP (1980)

                      My Boating Web Pages: http://www.tpenfield.com

                      Member of the Month - February 2013

                      Comment


                      • #12
                        Since the kill switch and neutral switch are on two different circuits, maybe some loose wiring.

                        The loose wiring/connector may be under the dash associated with the key switch since the switch is common to both the kill and start circuits.
                        BOAT SPECS FORUM HELP STARCRAFT FORUM SHOP iboats
                        Please, no PM's (Private Messages) regarding boat/engine problems.
                        That is what the forums are for.
                        Only forum/moderator issues will be answered in PM's.

                        Comment


                        • #13
                          Thanks, GA

                          I'll take a look at the ignition switches since they seem to be common to the symptoms.
                          Best regards, Ted . . . . Cape Cod, MA

                          Formula 330 Sun Sport, O'Day Mariner Sail #3224, Sunfish
                          Past Boats: Catalina 22 Sail #10531, Formula 242 Sun Sport
                          Twin Mercruiser 7.4 LX MPI (0F802036, 039), Bravo 3's (0F806198, 199), Mercury 7.5 HP (1969), Johnson 4.5 HP (1980)

                          My Boating Web Pages: http://www.tpenfield.com

                          Member of the Month - February 2013

                          Comment


                          • #14
                            I just ordered two new ignition switches , right here on iBoats Cole Hersee M-550-14 switches . . . which seem to match what my boat has pretty well.

                            I'm not 100% sure that is the issue, but at least it will be a first step on the process of elimination. I figure 21 years and 950 engine hours is probably about time for new switches
                            Best regards, Ted . . . . Cape Cod, MA

                            Formula 330 Sun Sport, O'Day Mariner Sail #3224, Sunfish
                            Past Boats: Catalina 22 Sail #10531, Formula 242 Sun Sport
                            Twin Mercruiser 7.4 LX MPI (0F802036, 039), Bravo 3's (0F806198, 199), Mercury 7.5 HP (1969), Johnson 4.5 HP (1980)

                            My Boating Web Pages: http://www.tpenfield.com

                            Member of the Month - February 2013

                            Comment


                            • #15
                              Sign up today
                              Update:

                              I went to replace the 2 ignition switches on my boat today and when I opened up the dash panel I found that the terminals had quite a bit of corrosion on them.
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                              So, my thoughts were that maybe the corrosion is the issue not the switches. Here is a close up of the starboard engine ignition terminal. The other leads were similar, some not as bad.
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                              I disassembled the terminals, cleaned up the mating surfaces and put it all back together, along with a coating of electrical grease.
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                              The engines started right up, but I'll have to see how things go and if the corrosion seems to be the extent of the problem. If not, at least I have got new switches ready to go.
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                              Last edited by tpenfield; September 4th, 2017, 04:54 PM.
                              Best regards, Ted . . . . Cape Cod, MA

                              Formula 330 Sun Sport, O'Day Mariner Sail #3224, Sunfish
                              Past Boats: Catalina 22 Sail #10531, Formula 242 Sun Sport
                              Twin Mercruiser 7.4 LX MPI (0F802036, 039), Bravo 3's (0F806198, 199), Mercury 7.5 HP (1969), Johnson 4.5 HP (1980)

                              My Boating Web Pages: http://www.tpenfield.com

                              Member of the Month - February 2013

                              Comment

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