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February 15, 2026 at 11:49 pm
#304695
When I was first trying to understand relations between OMC engines of different marks and years, I put together this interactive chart:
https://www.regressive.org/phil/boat/omcyears.html
It shows The 1935 Sea King has the same bore, stroke and displacement as:
1933: Elto “Super A” 8.5hp and Evinrude Fleetwin 8.5hp
1934: Evinrude & Elto Fleetwin 8.5hp
1939-41: Elto Fleetwin 8.5hp
I’m *SURE* not all the information I entered is correct!!
I did a similar chart for Mercury: https://www.regressive.org/phil/boat/mercyears.html
Where the column colors indicate the bore.
http://www.omc-boats.org
http://www.aerocraft-boats.org