performance numbers for 18 and 20 secraft with 150

[small45]

my '75 18' will run 51 by gps. that's a 2005 yami 150 carb motor on a Hermco bracket. it's pretty loose at wot since i still don't have any tabs on it.

[Fr. Frank]

I used to run a Mercury XR4 2.0L 150 carb'd model on my Seafari. It would get a GPS measured 46.5 knots (53-54 mph) on a good cold day with the top down and just me in it. Loaded up with 4 adults, fishing gear and full fuel dropped it to 41-42 knots at WOT. Cruise with that motor was best at 25-28 mph, which is just slightly more than I cruise now with my 90 hp Optimax

Another 20' SeaCraft owner locally is running a 250 Yamaha HPDI on a Porta-bracket. He claims well over 60 mph at WOT, but I don't remember just how fast at the moment.

[2182]

my 85 18' will go 44 wot (5500), 32 at 4000. motor is a newer carbed johnson 150. small45, what prop are you turning for those numbers? im jealous.