Top Speed??

[macojoe]

Its now just about 1 in the afternoon and it is 5*here now. Wow we are having a heat wave!!

[reelapeelin]

Don't get me wrong...we got on 4-6 layers of whatevers clean...full enclosure w/propane heater makes a cold day tolerable, but it's all worth it cause these fish turn on in this cold water

look back on pg 3 of this thread at poolman in SW Fla waitin' on it to warm up some so he could take the boat out...my heart bleeds ::)

I have a 1987 v-20 cuddy w/1993 200hp Johnson Ocean Runner. I've had it at 5300rpm with the top down, less than a quarter tank of fuel, calm day and all trimmed out at 45 knots. That's about all I want it to do anyway. My gps displays top speed at 47.7 knts but that is running with the tide. However this year I'll keep a close eye to make sure I stick around 4k rpm's. Fuel in Savannah is over 2.00 on the water and 1.65 at the pump and looks like it'll be going even higher.

With my new 200 yamaha my GPS says that my top speed is about 48 to 49 mph. Its rare that I can do that speed though, only in the creeks coming home after fishing. The old Merc 200 that was on her was not quite as fast and she burned much more fuel. My boat is a 86 cutty.

1st time posting. Great Site. 1985 V20 with 225 Johnson High Output (about 240hp at prop). She runs 53-56mph by GPS depending in load. Cruise at 40mph @4400 rpm and 13 GPH. Happy to see so many people appreciating these boats.

I've got a '95 V-21 and a Yamaha 200. The 12" set back that makes it a V-21 helps with top end. With a light load and almost full trim I can hit 50 -51 mph at 5500 RPM. I'm turning a 19" pitch Yamaha stainless prop.

With a couple of people and more fuel, I cant get it much over 46mph and around 5200 RPM, which is still plenty for me. These speeds are from the water pick up speedometer on the Yamaha lower unit. I don't have a GPS and don't know how accurate these speeds are but from what I've heard, they are in the ball park.

Welcome Tom,

What makes you so sure that the 12 inch setback helps with top end?

I would like to think it does :), and I have heard some amazing claims to that effect, from some boat and bracket manufacturers, but I am not aware of any truly scientific comparisons (controlled to a single variable -- the setback) for the v21, or any other boat or bracket. Not saying they don't exist -- just that I don't know of any. Maybe you could post a link to one?

Without a gps, your numbers are a bit iffy, as well. Although they do seem "about right".

If anyone has a 14 1/2 x 19 stainless prop for an OMC (Johnson 150) that they don't use or want let me know what you'll take for it. I had my 19 pitch repitched to a 17 and Although I got more revs I don't like the performance out of the hole plus I lost some top end speed. I have been looking on eBay but they seem pricey to me.
Thanks all
CJ

What's the right prop?

V20 Cuddy, Yamaha 150? Got a 17" right now, no water time yet so no numbers to report. Hopefully by next week.

S

if you are looking for good speed with 150hp, your 17pitch should do just fine. anything steeper than that wouldnt do you any good(the old hp vs. wieght vs. drag ratio thing). plus, with an 18 or 19pitch you would be burning a crapload of extra fuel coming out of the hole. unless you go 225hp or more a big pitch prop isnt really gonna do anything but burn more fuel. :'(