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Mercury 20H Ignition Conversion

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  • Mercury 20H Ignition Conversion

    I've written about this before. Based on info I got here on HR I converted my 20H ignition to one similar to the Sidewinders using the OMC CD2 system.

    The PDF documents I am attaching show what I did. APBA Modified has accepted this for 250Mod. APBA has stipulated that only Ed Runne is recognized as qualified to do the flywheel modification.

    I am curious how many of you will be seriously interested in doing this. If you want to know how much this will cost I think it will be in the range of $250 to $500 depending on how much you can do yourself and whether you buy new or used.

    Don't click or double click the attachments, right click and then 'open in new tab' or 'save target as...'
    Attached Files
    Last edited by Mike 41P; 09-19-2018, 11:58 AM.
    dpdeck and jsilvestri like this.




  • #2

    Re: Mercury 20H Ignition Conversion

    bump... See if this flushes this posting out.



    Comment


    • #3

      Re: Mercury 20H Ignition Conversion

      Here is some help on the power pack and coil. Shop used on Ebay or use this for new CDI Electronics parts

      The CDI power pack part numbers for NO LIMIT units are 113-2285 and 113-4783
      http://www.amazon.com/gp/product/B00...d_hps_bw_c_x_5
      http://www.amazon.com/Johnson-Evinru...cd2+power+pack

      The coil is CDI # 183-3740
      http://www.amazon.com/CDI-Electronic...+ignition+coil

      DO NOT use any of these, they all have RPM LIMITERS 113-3241 113-4767 113-5316

      Here is the CDI catalog
      http://www.cdielectronics.com/view-catalog-online/



      Comment


      • #4

        Re: Mercury 20H Ignition Conversion

        great price on this one
        http://www.ebay.com/itm/Flywheel-9-9...5WkYD2&vxp=mtr
        here is a search list
        http://www.ebay.com/sch/i.html?_dct=...:MEFSRCHX:SRCH



        Comment


        • #5

          Re: Mercury 20H Ignition Conversion

          now here is a good stator, unfortunately it does not have the retainer ring or screws with it, maybe the seller could add them if asked
          http://www.ebay.com/itm/251188570306...%3AMEBIDX%3AIT



          Comment


          • #6

            Re: Mercury 20H Ignition Conversion

            another good stator
            http://www.ebay.com/itm/272227698209...%3AMEBIDX%3AIT
            just remove alternator coils, low priced



            Comment


            • #7

              Re: Mercury 20H Ignition Conversion

              here is a retainer ring cheap
              http://www.ebay.com/itm/Stator-retai...JTLIDc&vxp=mtr



              Comment


              • #8

                Re: Mercury 20H Ignition Conversion

                Contact info to get flywheel machined and adapter collar and coil/power pack mount brackets ?

                ...... I have 3 extra uncut flywheels avail $30 each + flat rate priority box to Runnie..... You pay machining and return..... Bought 4 from Weigle Bros Marine Franklin Pa. Any word if a kit to be avail?........

                I will look to see if I have a crankcase I can send for mock up.
                100N STEVE FRENCH > Nobody can hang with my STUFF!! >> http://www.youtube.com/watch?v=tna3B5zqHdk

                SEEEEEE YAAAAAA!!............In my WAKE!! .............100N>>

                Comment


                • #9

                  Re: Mercury 20H Ignition Conversion

                  you can get Ed by email SLED7J@earthlink.net



                  Comment


                  • #10

                    Re: Mercury 20H Ignition Conversion

                    Modhydro,
                    Steve could you make the adapter plates? >> http://hydroracer.net/forums/filedata/fetch?id=444815
                    Last edited by STEVE FRENCH; 06-18-2016, 06:49 AM.
                    100N STEVE FRENCH > Nobody can hang with my STUFF!! >> http://www.youtube.com/watch?v=tna3B5zqHdk

                    SEEEEEE YAAAAAA!!............In my WAKE!! .............100N>>

                    Comment


                    • #11

                      Re: Mercury 20H Ignition Conversion

                      I was with Ed Runne at Berwick, he has a 2 flywheels to turn down now (1 yours Steve that I just gave him) and he has designed a mount that will attach his SideWinder ignition plate with rubber isolation on the right hand side of the 20H. If someone is interested in that they should contact him
                      SLED7J@earthlink.net



                      Comment


                      • #12

                        Re: Mercury 20H Ignition Conversion

                        bump, this one has the how to details Steve



                        Comment


                        • #13

                          Re: Mercury 20H Ignition Conversion

                          bump, this one has the how to details Steve
                          still need someone to make mag adapter and clamps....... Thanks for your work on this MIKE !

                          Should benefit ANY two cyl Merc owners..... Even KG-4 / 7, Mark 15, Mark-20 fish'n , mark-28, etc.to replace the Phelon and even troublesome Skintilla ignition..... Just need to find the small crank taper like KG-4 or the larger taper 20H / Mark-25 size tapered OMC flywheel and a stepped two size key The small taper cranks and flywheels might have same dimension ?.....
                          I've seen both on E-Bay reasonable...... Just need to know what HP your L@@K'n for !

                          This should cure ALL point mag issues !!.......
                          Last edited by STEVE FRENCH; 02-12-2017, 06:25 AM.
                          100N STEVE FRENCH > Nobody can hang with my STUFF!! >> http://www.youtube.com/watch?v=tna3B5zqHdk

                          SEEEEEE YAAAAAA!!............In my WAKE!! .............100N>>

                          Comment


                          • #14

                            Re: Mercury 20H Ignition Conversion

                            bump, this one has the how to details Steve
                            Mike, Appreciate your work on this but if nobody willing to make a run of the stator adapter collars and clamps say 25 or 30 then your work and blue prints are without merritt ?

                            Too bad because this is the cure !

                            I sent e-mail to Ed to ship my flywheel s but their going on the shelf for this season unless a machinist can beb found.

                            Thanks again for your efforts,
                            Steve 100N
                            Last edited by STEVE FRENCH; 02-16-2017, 02:47 AM.
                            100N STEVE FRENCH > Nobody can hang with my STUFF!! >> http://www.youtube.com/watch?v=tna3B5zqHdk

                            SEEEEEE YAAAAAA!!............In my WAKE!! .............100N>>

                            Comment


                            • #15

                              Re: Mercury 20H Ignition Conversion

                              bump, this one has the how to details Steve
                              Mike, Please contact Steve Roskowski..... I think we found a machinist for your 20H ignitions...... I need 4 kits !.......

                              "Steve,

                              Let me see what I can figure out on them. Do you just need the turned work done or the angle brackets to mount the box and coil as well?

                              Looking through the stuff would it make more sense to have the OMC stator locked onto the adapter and then tighten the adapter from the bottom by having the 1/2" plate be threaded. What do you think about that?

                              Email me directly. It will be easier and quicker."

                              Steve

                              sroskowski@arcindy.com
                              Last edited by STEVE FRENCH; 02-26-2017, 09:03 AM.
                              100N STEVE FRENCH > Nobody can hang with my STUFF!! >> http://www.youtube.com/watch?v=tna3B5zqHdk

                              SEEEEEE YAAAAAA!!............In my WAKE!! .............100N>>

                              Comment

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