Topic: 1948? Evinrude 4423 3.3hp sportwin – Page 2

This topic has 18 replies, 10 voices, and was last updated 3 years, 8 months ago by DAN UMBARGER.

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October 14, 2017 at 11:51 pm #66219
garry-in-michigan
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Lifetime Member
There were serveral changes to Irgies "Fishing motor of the future" as it got into the hands of actual fishermen. As previously mentioned modern seals may be used (SKF 5523 & SKF 4770) The fuel system (dare I say Carburetor) was designedon a computer and is totally unique to this model. . . 😉
October 24, 2017 at 6:02 pm #66568
greg-o
Participant
US Member
I am just getting back to this project. Thanks Garry for the great information. This is the exact motor I have. I have not taken the motor apart yet. In fact have not gotten it to run yet. It is not getting fuel. Something needs cleaning. I am assuming the impellers are rubber, but I may be wrong here. They may indeed be metal as someone suggested. I will find out. Thanks for all the great information.
March 11, 2021 at 5:51 pm #233587
audiobahn01
Participant
Thank you guys for this thread, I’m new here but used some of the info here to get my 4423 up and running!
- This reply was modified 3 years, 8 months ago by Mumbles.
March 11, 2021 at 7:02 pm #233605
Timothy McDonald
Participant
I’m new also. My ’48 Sportwin doesn’t look like yours. Did they do a remodel in ’49 or 50?
March 11, 2021 at 7:22 pm #233610
Mumbles
Participant
Timothy McDonald wrote:

I’m new also. My ’48 Sportwin doesn’t look like yours. Did they do a remodel in ’49 or 50?

Are you sure your motor is a Sportwin, and not a Sportsman? The quickest way to tell the difference is the Sportwin models came with a clear plastic fuel gauge on the front of the tank. The single cylinder Sportsman motors didn’t. Any photos?
- This reply was modified 3 years, 8 months ago by Mumbles.
- This reply was modified 3 years, 8 months ago by Mumbles.
March 11, 2021 at 7:34 pm #233615
Timothy McDonald
Participant
Says Sportwin on the front
- This reply was modified 3 years, 8 months ago by Mumbles.
March 11, 2021 at 7:55 pm #233623
Timothy McDonald
Participant
No luck loading the picture. Using smart phone. yes, I’m certain it’s a sportwin. says so on the front and it’s got two cylinders. brass tag says OB35A 4371.393 oops… thats’ not 48?? It’s a twin with 3.3 HP but about 7 pounds heavier.
March 11, 2021 at 8:18 pm #233629
Mumbles
Participant
OK, yours is a model 4371, not a 4423, and was produced from ’41-’47. It is an opposed twin while the ’48 and later 4423’s were alternate firing inline twins. Two completely different animals with the same name.

Yours is a nice motor by the way and it appears to be in good condition. With the painted tank and emblem on the front, I’m guessing it’s a ’46 or ’47.
- This reply was modified 3 years, 8 months ago by Mumbles.
March 11, 2021 at 10:00 pm #233647
DAN UMBARGER
Participant
US Member
Looking in The Old Outboard Book it looks like the 4371 was built only in 3 model years…s/n up to 10000 was the older style tank/teardrop decal and s/n 10001 to 30000 was 1946 and 30001 & up was the 1947 so yes it appears Tims motor is a 46 or 47….I don’t what the OB35A is but wonder if the 393 is the start of the serial number which might indicate a 47. I have a 41 with the original decals that’s a great runner.
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