Evinrude Sportwin 4421

Home › Forum › Ask A Member › Evinrude Sportwin 4421

Viewing 3 posts - 1 through 3 (of 3 total)
  • Author
    Posts
  • November 25, 2016 at 3:13 am #5767
    ray-mason
    Participant

      Gentlemen,

      I found this Evinrude 4421 Sportwin at an antique fair last weekend. It’s complete minus the recoil mechanism and knobs, has compression (haven’t measured it yet), and I haven’t checked for spark yet. Overall it looks like it’s in pretty good shape. I see some discussion on the later 4423 and 4424 motors but nothing on the 4421. Does anyone have any info on this motor?

      Thanks,
      Ray in Brandon, FL

      Attachments:

      November 25, 2016 at 5:26 am #47994
      Mumbles
      Participant

        What you have is a ’47 3.3 horse opposed twin motor. The ’48 and later 4423 Sportwins were inline alternate firing motors. It originally called for 1/3 pint of oil per gallon (24:1) but it might be better to use a bit more oil. 1/2 pint per gallon would make a 16:1 mix. It spins a 7 X 5.5 inch two blade aluminum prop with a 3/16 X 27/32 hard brass shear pin. The plugs are gapped at 0.025 and the points at 0.020. The 171449 condenser/capacitor should read 0.010 uF (mfd) with an allowable +/- 0.02 uF.

        Here’s some more info on your 4421.

        Attachments:

        November 25, 2016 at 11:46 am #47998
        ray-mason
        Participant

          Thanks for the information Mumbles, that helps a lot!

        • Author
          Posts
        Viewing 3 posts - 1 through 3 (of 3 total)
        • You must be logged in to reply to this topic.