I bought all the stage 2 for my Gp1300R,and it came with the impeller 14/20set back. After i put all the kit on my watercraft, I couldn´t reach more than 6.000 RPM. After many information I changed the Impeller, i Put the Standard and i coul rech 7200 RPM and 71.9 on GPS Garmin.
So now i ask what´s the right impeller?
I noticed that my watercraft on smooth water it jumps a lot, it seens a horse. It´s normal.
I´m waiting for help.

Júnior
GP1300R stage 2
GP1200R stock
SUPER JET super stock
www.yamar.com.br

I would call Carl at island racing he could tell you best.

2000 GP 800
Riva Double bar intake grate
Riva Rideplate
Riva/Boyesen Reed Stuffers Skat-Trak 14/18
Riva Heads 37cc
R&D povervalves
Oil pump block off
Hydro-turf
1997 GP 1200
Stock

Whats your elevation? Does it feel sluggish?

quote:

---

Originally posted by Water Woody:
Whats your elevation? Does it feel sluggish?

---

A ALREADY RODE ON HIGHT ALTITUDE AND IN THE SEA NIVEL.(OCEAN)

Júnior
GP1300R stage 2
GP1200R stock
SUPER JET super stock
www.yamar.com.br

quote:

---

Originally posted by Júnior #1:

quote:

---

Originally posted by Water Woody:
Whats your elevation? Does it feel sluggish?

---

A ALREADY RODE ON HIGHT ALTITUDE AND IN THE SEA NIVEL.(OCEAN)

Júnior
GP1300R stage 2
GP1200R stock
SUPER JET super stock
www.yamar.com.br

---

Could we have that in english this time

02' GP1200R
Riva 2 bar grate-blueprinted
PPK
Nu-Jet 6.5 Pro 12/18.5
Stepped sponsons
Waveater powervalve stuff
Carb mod by Island Racing
Prok F/A's
Pro-Tec stuffers
R&D D plate
R&D rideplate-skegs removed
Pro-Tec rec head
Riva/Jettrim seat cover
71.5 @7190

I think he meant he already rode it on high elevation and sea level.
11

Building :
2003 S/S triple STXR (35% completed)
2003 ltd SXR (95% completed)
2001/02 ltd XP (0% completed)

I thought I posted this here yesterday, guess it didn’t work?

There is a guy in Huntington Beach California that has been doing some intensive testing on the 1300R since summer and recently has found some interesting results you should talk to him about your problem. His setup is pulling around 75mph on pump gas using a stock pipe 14/20 prop and R & D grate and ride plate and was confirmed by an ATS radar gun which was held by the owner of R & D. The interesting part is what they found once the motor testing was finished on what caused the largest variation in acceleration and top speed was which new 14/20 prop they used and which ride plate they bolted on. Ask him how much of a difference in mph they found between a few new 14/20 props and which ride plate they tested that added more mph over the R & D ride plate and smoothed out the ride, next time in fast water maybe 77mph? The mechanics name is Greg Beaver the shop Circuit Racing at 714-375-7744. Anyone that has been around for awhile has known Greg he has been wrenching almost since the sport started. Greg and Dan Lamey use to work together on all the race boats back in the old PJS days for about 10 years.