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timing advance-gctid808418

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    timing advance-gctid808418

    I timed my new 5.7 to 10 degrees.I accelerated to 2500 rpm and it only advanced 3 or 4 degrees,is this normal,if not how do I fix

    #2
    Normal for module 22

    22a is the next one listed.





    Attached files

    Dave
    Edmonds, WA
    "THE FIX"
    '93 2556
    Carbureted 383 Vortec-Bravo II 2.0:1 18 1/4x19 P

    The rebuild of my 2556 https://www.baylinerownersclub.org/f...76?view=thread
    Misc. projects thread
    https://www.baylinerownersclub.org/f...56-gctid789773

    Comment


      #3
      you need about 30 deg of adv at 3000, is it a mech dist or electronic???

      Comment


        #4
        wires go into module on exhaust riser

        Comment


          #5
          "bkc914" post=808421 wrote:
          you need about 30 deg of adv at 3000, is it a mech dist or electronic???
          NOPE you do not.

          All Mercruiser TB are electronic.
          Joon, Kathy, Jaden & Tristan
          Uniflite 42 AC, DD 671N
          93 3058 sold
          92 2855 (day boat)
          91 Fourwinns 205 (lake boat)
          Longbranch WA
          Life is Good

          Comment


            #6
            "bkc914" post=808421 wrote:
            you need about 30 deg of adv at 3000, is it a mech dist or electronic???
            No, module 22 at 3000rpm will have a total advance of 24 degrees. Op is running a TB IV (4) ignition.
            Dave
            Edmonds, WA
            "THE FIX"
            '93 2556
            Carbureted 383 Vortec-Bravo II 2.0:1 18 1/4x19 P

            The rebuild of my 2556 https://www.baylinerownersclub.org/f...76?view=thread
            Misc. projects thread
            https://www.baylinerownersclub.org/f...56-gctid789773

            Comment


              #7
              I get 15 degrees on timing tape at 2500 rpm,i disconnect ground from purple wire and restart.I now have 14 degrees at idle instead of 10

              Comment


                #8
                No need to disconnect anything or jumper wire on the TB 4. Warm engine, set it at 8 degrees btdc at 650-700 rpm.
                Dave
                Edmonds, WA
                "THE FIX"
                '93 2556
                Carbureted 383 Vortec-Bravo II 2.0:1 18 1/4x19 P

                The rebuild of my 2556 https://www.baylinerownersclub.org/f...76?view=thread
                Misc. projects thread
                https://www.baylinerownersclub.org/f...56-gctid789773

                Comment


                  #9
                  now my timing is 4 degrees BTDC at 2500 rpm,going nuts!

                  Comment


                    #10
                    look up service bulletin 95-11...it may be helpful

                    Comment


                      #11
                      where do I find bulletin 95-11

                      Comment


                        #12
                        jsut google mercruiser servic bulletin 95-11, or give me your email and ill send it to you.....i tried attaching here but didnt work

                        Comment


                          #13
                          http://www.boatfix.com/merc/bullet/95/95_11.PDF

                          Pages11-12

                          5.0-5.7 engines using TB 4 with module 22

                          8 degrees btdc
                          Dave
                          Edmonds, WA
                          "THE FIX"
                          '93 2556
                          Carbureted 383 Vortec-Bravo II 2.0:1 18 1/4x19 P

                          The rebuild of my 2556 https://www.baylinerownersclub.org/f...76?view=thread
                          Misc. projects thread
                          https://www.baylinerownersclub.org/f...56-gctid789773

                          Comment


                            #14
                            BTW,just wondering when I set base timing by grounding purple wire,do I disconnect it after that and run through my advance time or keep it in?

                            Comment


                              #15
                              Spaceman there is no grounding required while setting base timing on a TB 4 ignition system. Grounding the purple/white is for TB 5 only.
                              Dave
                              Edmonds, WA
                              "THE FIX"
                              '93 2556
                              Carbureted 383 Vortec-Bravo II 2.0:1 18 1/4x19 P

                              The rebuild of my 2556 https://www.baylinerownersclub.org/f...76?view=thread
                              Misc. projects thread
                              https://www.baylinerownersclub.org/f...56-gctid789773

                              Comment

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