which props. for Renaissance 246 Prowler???

[big bass]

Have a 2001 Prowler 246 with 115 Yamaha four strokes.

Presently have 3 blade Yamaha props. 13 1/4 X 18 stainless.

Under a fairly full fishing load it won't tach much over 5000 rpms. Is this even close to what it should be??

Thanks in advance!

[sundancekid]

Should be between 5500-6000 and should be able to hit 6000 light and at least 5500 fully loaded. Check to be sure your engines are high enough and that you are trimming them up when conducting WOT tests. This would be to the point of ventilation (more RPMs, but less speed), then trimming back down slightly until the props "bite" again. Proper engine height would be such that the anti-ventilation plates are on the surface of the water at 4500 RPMs with neutral trim.

[big bass]

I did my WOT test similar to what you described in the past, so I figure I have the wrong props for my application. Was hoping a Prowler owner with a similar setup would have some insight. Still your info confirms my suspician I'm not taching close to what I should.

[catfoiler]

what is your top end?

[big bass]

32 knots with half fuel

[Latitude Improvement]

I had a 2002 Prowler with those motors and if I remember right I had 13-1/4x17 props and got 5600 rpm WOT and 39mph. My mpg were never the 3.5 - 4 they claimed.
That 246 is one helluva boat though!

[BMosely]

Go to propgods and check your slip. I have a 25' Seacat with 130's and with the 13 x 17 Yamaha props I was way off with almost 20 % slip. I now have Powertech RXB 13 x 14 4 blades and it is a new boat. Slip is at 11% and the hole shot is great. My fuel burn stayed the same for the same speed, but the boat handles 100% better.

[First Light]

Latitude Improvement - 4/29/2008 I had a 2002 Prowler with those motors and if I remember right I had 13-1/4x17 props and got 5600 rpm WOT and 39mph. My mpg were never the 3.5 - 4 they claimed. That 246 is one helluva boat though!

A general rule of thumb is that if you need 15 inch pitch props to reach your engines maximum rated rpms, you are on the edge of needing more hp. And if you cannot come close to your engines maximum rated rpms with 15 inch pitch props then you definately need more hp. This general rule of thumb applies to any boat - cat or monohull

[big bass]

Lattitude, I'm getting a tough over 2 mpg, did you do much better?

BMosely, I'll check out prop gods.

First light, dude, you lost me. Need more HP??? Satisfied with 40 wot, and 30 cruise.