My Johnson Common Parts book says the same flywheel is common to both the 15 and 18hp. I suspect Evinrude would therefore also be the same.
Bob
1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1955 Johnson QD-16
1957 Evinrude Fastwin 18
1957 Evinrude 3022
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20
“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."
A flywheel should fit from an 18,20, and 25 horse motor right thru the mid seventies. The tapers are the same. the mags are the same but thr ring ger teeth are smaller on later flywheels.
Here’s my ’58 FD with a later 70’s flywheel on it. It should have a flywheel with taller teeth on it.