How long is your hot foot throttle cable?
I am running a new to me 2005 929 with Mercury pro xs 225 with 10" hydraulic jack plate and i am only seeing 5400-5500 rpm at wot. 25 pitch tempest. 65.1 mph gps. I raise my plate some and if i start to see spray my alarm goes off for water pressure. Any ideas? Whats the point of having hydraulic plate if i cant even jack it up when running shallow or for performance ?
i also think my rpms are low. I used to see. 6,000 easily with my 04 optimax on my 19ft Champ and it blew a huge rooster tail wot
I own a 2014 Nitro Z8 pushed by a 250 Pro XS and absolutely love it. Right now I'm running a tempest 25 pitch but just ordered a 26 pitch fury. Here are my stats:
Full tourney load
1/2 tank of fuel
two men (360lbs)
no water in wells
Air temp 70 degrees, water temp 65 degrees
25 PSI water pressure
3.5 below pad
73.8 MPH GPS @ 6100 rpms
Last edited by JD9305; 12-19-2014 at 08:17 AM.
2011 z8 250 pro xs
26p tempest
3.75 underpad
3sec hole shot
78 mph gps,by myself 1/4 tank fuel with tourny load 6000 rpm
hds 10,hds front
hds 10,hds7 at bow
with partner and livewells full and tourny load iget right at 75 mph and runs high and dry perfect speed without runninng to hard iwould say 70 71 mph
2013 Nitro Z9
Mercury 250 Pro XS
Just me 200 / half tank / with gear
Fury 25 5700 rpm @ 66 mph WOT
Fury 27 5700 rpm @ 70 mph WOT
10 in. Atlas Hydraulic Jack Plate
4 on Jack Plate Gauge /1inch below pad
David Geske
Boatless Family Man
Ran my best speed yesterday morning
2013 Z7
150 Pro XS 6" plate
24p Tempest Plus
3" below pad
12 psi
5650 rpm
62.1 mph (gps)
2 people, light load, 1/2+ fuel.
2015 Nitro Z9 250 ProXS
Dual Power Poles
Helix10di , Helix10 Mega
Motorguide #109
Running my first Nitro this year a 2015 Z 8 with 250 Mercury Pro XS
25 Fury and this boat runs great !!
mid 70's with just me and half tank of gas , very impressed with the Z 8 so far guys !!
I have the exact same setup as Bassncrazy with a 10in Atlas plate, just took her out today for the first time and got similar results. Loving the Z-8. Great ride!
Guys I have a 2003 Nitro 901CDX w/ 2007 200merc optimax --- buzzer goes off at 5800rpm and 61-62 mph..... oil pressure is good, water pressure is good and I have no idea what is going on. And for the first time the mercury people sucked, all they told me was that its something to do with the boat..... WTF??? can anyone shed some light on this for me???
I believe that engine has max rpm of 5750 so an alarm at 5800 sounds right. I have the same boat 2009 with 200 opti and at around max rpm I'm getting about 64mph max. 4 blade 26p. I don't think you are far off from max speed on your boat. Does it have a jack plate? What prop you running? Have far above or below pad are you. Is your rooster tail above your motor? More info needed. After more info more recommendations can be suggested.
No you can not adjust the rpm. That prop seems small. Go upto a 25p and that should be just right. this vid will show you how to adjust your jack plate and get the engine height.
Make sure you have enough water pressure. WOT should be around 18psi I would try around 3" below pad and adjust up or down from there. It's a process that takes time. Move a 1/4" at a time. Then test run again.
I appreciate the help, talked to a prop guy down here and he said he would go to a 25p tempest plus 3 blade, my water pressure WOT is at about 22psi right now.
LD17, turns out my uncle did not care about the motor being set correctly, luckily when I bought it the motor only had 32hrs on it. My prop shaft is 5" below pad. Leveled the boat and the pad was 16" high, leveled the motor and the prop shaft was 11" high.Cant wait to get my 25p 3-blade Tempest Plus, get the motor up 2” and see what this thing will do.