Performance on a 20cc with a 200 Yamaha ox66

[Fr. Frank]

Frank - I think he's 48/49mph with the 19 pitch.

Yeah, that sounds right. If I'd engaged my brain first I'd have remembered that.

I seem to remember a discussion about the 50mph barrier being tough to crack.

You're right about how difficult it is to break the 50 barrier. I got my Seafari over 50 mph a couple of times (when I had the Mercury 2.4L), but the weather, loading, chop and everything else had to be just about perfect. My best ever was an indicated 47 knots on the GPS. More normally, I topped out at 42-43 knots. And for some reason, I always pushed the boat to WOT at least for a little while, just to see...

I had 1.62 gears (I think, or maybe they were 1.65), with a 15.25"D x 16.5"P custom PowerTech OFS prop, turning 6100 rpms, lightly loaded, with a nose cone, low-water pickup, cavitation plate 2.25" above the keel, running the prop just barely surfacing. With a strong cross-wind, it could get a bit squirrelly at top speed. It was fun, though.