Thread: RPM Question
07-15-2007, 07:35 AM #1
On a 1300 W/ fuel injection (no carbs or advent setup) What is the factory rev limit. Also, what are the max rpm's you can turn before a repitch is needed? Thanks. Alan
07-15-2007, 07:38 AM #2
I'm not sure what the limit is. I am sure WFO can answer that. You want your RPMS around 7150 though.
07-15-2007, 08:01 AM #3
Hey thanks, Mine are way too low in the heat. 6920. Was thinking about trying the stock impeller today, but I know its gonna be spinning way too fast. Carl said I would be down some RPM until more was done. Oh well, time to add more power!
07-15-2007, 08:20 AM #4
- Join Date
- May 2006
Factory rev limit is 7400 RPMs I believe.
07-16-2007, 01:45 AM #5
07-16-2007, 03:31 AM #6
Are you running an 03 or an 05 pump with that 14/20? I was running that same basic set up for awhile but if your running an 03 pump I think you may have a little to much impeller. If your still running 03 pump I would try a 13/20 set back, with my old set up I was turning 7360 at 70+ mph.
Last edited by injected2stroke; 07-16-2007 at 03:39 AM.
07-16-2007, 09:18 AM #7
07-17-2007, 12:54 AM #8
The day it was turning 6920 was a brutal day. Temp was over 95 degrees and humidity was near 100%. I still think I'm overpropped 6920 equaled 69.8 mph. On cool days/evenings with low humidity It turns 7080 at about 71.5, but those days are far and few between now that summer is here in full swing. Maybe I should fill the front bucket w/ ice before I ride!
Last edited by Prism; 07-17-2007 at 01:12 AM.
07-17-2007, 01:07 AM #9
07-17-2007, 07:24 AM #10
I was running 7360 with a 13/20 set back but I had a riva nozzel and it was just over 88mm. had the same set up on another boat with a 87mm Yamaha nozzel was at 7250 rpms. I definately think you have to much impeller with your set up. I have a 13/20 set back like new for an 03 pump if your interested for a good price if not thats ok but I think it would be more suited to your needs. If your interested send me a PM.
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