Flywheel and piston rings should be on Ebay.
"If you lack the knowledge, use intuition. If you lack intuition, use the AOMC website"
2 1925 ELTO Ruddertwins
1940 Evinrude Sportsman 2hp
1941 Evinrude Sporttwin 3.3hp
1941 Sears/ Kissel Waterwitch 571.35 1hp
1945 Neptune model 15B2 2 hp
1955 Johnson CD-12 5.5 hp