RD-17 crank threads

[trex014]

Does anyone know what the threads are for a RD-17 crankshaft? I need to chase the threads on a rusty one but cannot figure out the size so I can get a correct size die.
Thanks

[frankr]

Don’t have one handy to measure, but it is either 9/16-18 or 5/8-18. I think 9/16.. You can measure it with any ruler.

[Bob Wight]

My RD-18 is 9/16-18. Yours should 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."

[trex014]

Thank you very much frankr and bobw.

[Author]

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