You I/O guys can get one of these 600 HP Mercruisers to freshen up your V-20, I'd get the 5 blade prop as well.
Us O/B boys will have to hang 2 of these 300 Mercs to keep up.
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Stay Safe!
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.