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Rpm/speed maps?

Beachbummer

Jetboaters Admiral
Messages
4,058
Reaction score
2,976
Points
352
Location
Houston TX
Boat Make
Yamaha
Year
2008
Boat Model
SX
Boat Length
23
Good afternoon,

So I resealed my pumps and have "refurbished" impellers installed now from SBT.

I got to test just a bit last weekend but based on how dinged up the old impellers were, i expected a greater improvement in performance.

Boat was loaded with 4 adults and 4 kids, half a tank. Lots of wind. I was seeing 35mph at 8200rpm or so, and 42 at 9500. Did not get to do some wot testing as we got some rain, which felt like bullets at speed.... More test to come, but somr reference speeds would help.

I keep hearing the boat should jump out of the water, what rpm are you hitting to make it jump out?

Thanks!
 
2008 sx230

Thanks
 
That's what I have.. At wot I can get 45 to 48 depending on conditions and loading
 
Last edited:
Ok gps or boat speedometer?

Thanks.
 
GPS on chart plotter.. The one in the boat is reffered to as the dream o meter! My boat doesn't start doing anything much until about 7 k rpms. I just floor it until the boat comes up on plane and then start backing off. It will thow u out the back of the boat if u r standing up and not ready!
 
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