I was on the Wellcraft website and found links to old owners manuals. *The one for the "70's" boats also includes wireing diagrams for the V-20's and others.
Probably old news to most, but thought I would share.
http://www.wellcraft.com/index.cfm?
Click "Owners" on this page.
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Sold - 1984 V-20 Cuddy with a 2003 Johnson 140 hp gas sippin 4-stroke.
1995 Ranger 250C with a 2015 Suzuki 300 hp 4-stroke.