Announcement

Collapse
No announcement yet.

Homelite Charging System Upgrade

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Homelite Charging System Upgrade

    So I was noticing that at full throttle, my electrical system was putting out almost 16 volts, which I figure is enough to fry a battery in short order. I did some further research, and realized most of these old outboards were not equipped with voltage regulators... on all but the oldest Homelite/Bearcats, they were optional. The stator generates three pulses of AC current, and sends it to the rectifier to be converted to DC. A hi/low switch cuts one of the pulses from the stator out for lower load conditions, but still it is designed such that the battery is where all the excess power goes, and it will boil if too much power is available. I suppose that was considered no big deal back in the day, but it is not compatible with maintenance free batteries.

    Long story short, I realized that the stator/rectifier/regulator style charging system in a motorcycle is very similar to that on the Homelite, and purchased a modern Mosfet chip controlled recifier/regulator combination made for a Suzuki motorcycle. It has a 50 amp peak capacity with a 30 amp rating. About the most the Homelite will put out is in the 20-30 amp range. Installation was simple, remove the old rectifier, splice the three wires from the stator to the yellow wires feeding the new regulator, hook one of the green wires to ground (the regulator has two) and one of the red wires (again, there are two) to the positive post on the starter relay.

    Initial testing shows the system working as predicted, which should protect the Petronix unit from high voltage, result in more accurate gauge readings, and improve the battery longevity.

    Dave

    Homelite Regulator.jpg

  • #2
    Nice work for sure.
    Looks as you nailed it...
    Helmar Joe Johanesen
    1959 Skagit 20ft Offshore, 1959 Skagit 16ft Skimaster,
    1961 17ft Dorsett Catalina.1958 Uniflite 17 ft
    Outboards: 2.5 Bearcats, 3 50hp White shadow Mercs
    2 40hp Johnsons, several smaller Old kickers for a total of 12

    Our Sister club
    http://www.goldenstateglassics.com

    Oh, and Where is Robin Hood when you need him??

    Comment


    • #3
      Originally posted by davriker View Post
      About the most the Homelite will put out is in the 20-30 amp range.
      The 1965 Brochure shows 15amp for the Deluxe and 20amp for the Grand Prix.

      broch26.jpg
      Dick Johnson
      1989 16ft Sylvan
      '57 Evinrude 18hp
      '58 Johnson 5.5hp
      '61 Johnson 5.5hp LS
      '64 Johnson 18hp
      '72 Johnson 6hp
      '61 Homelite 55 Shortshaft
      '65 Homelite 55
      '66 Homelite
      '68 Bearcat 55 (3)
      '70 Bearcat 55 (2)

      Comment


      • #4
        So far mine hasn't over cooked a battery but again, I never had volt meter on it either. I think I did do a Amp meter at one time is all.
        Nice looking upgrade that folks can do to them.
        Helmar Joe Johanesen
        1959 Skagit 20ft Offshore, 1959 Skagit 16ft Skimaster,
        1961 17ft Dorsett Catalina.1958 Uniflite 17 ft
        Outboards: 2.5 Bearcats, 3 50hp White shadow Mercs
        2 40hp Johnsons, several smaller Old kickers for a total of 12

        Our Sister club
        http://www.goldenstateglassics.com

        Oh, and Where is Robin Hood when you need him??

        Comment


        • #5
          Very cool, been going to do the same thing for a long time now but haven't got to it. Mine spends a lot of time idling and I forget to flip the switch. Several hrs later with electronics on and on "low" if I kill the engine I'm rope starting it! Hmm, I think I have a unit off the '85 Shadow, it might have a new home.
          Dick Johnson
          1989 16ft Sylvan
          '57 Evinrude 18hp
          '58 Johnson 5.5hp
          '61 Johnson 5.5hp LS
          '64 Johnson 18hp
          '72 Johnson 6hp
          '61 Homelite 55 Shortshaft
          '65 Homelite 55
          '66 Homelite
          '68 Bearcat 55 (3)
          '70 Bearcat 55 (2)

          Comment


          • #6
            I'm getting ready to do this procedure on my Bearcat. After only 2 years my battery has died but before it did I noticed it was dying a slow painful death. I put my multimeter on it before it died and at WOT the voltage would jump to around 16. I'd rather have a better regulated system and this looks like the trick.
            1958 Skagit 20 Express Hardtop
            1958 Skagit 20 Express
            -PNW Craftsmanship


            Don't forget about the FAQ page if you need help with the forum:
            http://www.classicboatclub.com/faq.php

            Comment


            • #7
              What part number did you use for the Mosfet regulator?
              1958 Skagit 20 Express Hardtop
              1958 Skagit 20 Express
              -PNW Craftsmanship


              Don't forget about the FAQ page if you need help with the forum:
              http://www.classicboatclub.com/faq.php

              Comment


              • #8
                bump...any particular part number you used?
                1958 Skagit 20 Express Hardtop
                1958 Skagit 20 Express
                -PNW Craftsmanship


                Don't forget about the FAQ page if you need help with the forum:
                http://www.classicboatclub.com/faq.php

                Comment


                • #9
                  http://www.ebay.com/itm/Voltage-Regu...item4d271655d9

                  Comment


                  • #10
                    Awesome thanks!
                    1958 Skagit 20 Express Hardtop
                    1958 Skagit 20 Express
                    -PNW Craftsmanship


                    Don't forget about the FAQ page if you need help with the forum:
                    http://www.classicboatclub.com/faq.php

                    Comment


                    • #11
                      After researching the part on ebay (link above) I found a major recall on this part. Can someone else look to make sure I'm not seeing it wrong...
                      http://www.asphaltandrubber.com
                      "According to the recall, rectifiers/regulators on bikes built between July 2007 and September 2009 have an inadequate amount of adhesion between the power module and the case, which results in the unit not sufficiently being cooled by its heat sink (affected Suzuki part numbers are: 32800-41F11, 32800-15H10, 32800-05H11, 32800-41G10, 32800-15H00, 32800-18H00, 32800-05G10, 32800-10G10, 32800-05H20, OR 32800-06G01). As a result the unit’s circuit board could warp, and become dislodged from its casing."
                      1958 Skagit 20 Express Hardtop
                      1958 Skagit 20 Express
                      -PNW Craftsmanship


                      Don't forget about the FAQ page if you need help with the forum:
                      http://www.classicboatclub.com/faq.php

                      Comment


                      • #12
                        I would guess that would apply to oem units installed on the motorcycles from the factory, although it would follow that if it is an inherent design flaw, that the aftermarket part would have the same defect... hmmm.

                        Comment

                        Working...
                        X