RXT 260 in jon boat

[goatmilk66]

I have finished my build in 18' boat.i have a lot of cavitation on low and midrange.would a impeller for a seadoo boat be a better option?i can turn max rpm's,it does not grab like it should when accelerating.i have been thinking about dual impeller also.you guys are great and have been a big help with all of the other problems I have faced

 

[JPass]

How about a pic of the set-up so we can see what's up.

 

[goatmilk66]

RXT 260 jet jon

not good at loading pics,but here is a couple I got to work.

 

[JPass]

Need to see the underside where the pump and ride plate are to see where the cavitation is coming from.

 

[goatmilk66]

one more to show some more detail.i wish I could e-mail them.

 

[goatmilk66]

jet jon

I do not have pics of tunnel after I built up even with intake grate with uhmw plastic,but it is all even with intake now.boat is shown on top of 4x6 wood below tunnel.

 

[JPass]

I would venture to guess that your design allows for a lot of air to get pulled into the pump when first getting under way. Lots of hard edges and such.

 

[goatmilk66]

I guess I will cut tunnel out in winter and put intake even with boat bottom.may still try dual impeller.thanks for input,it's always B O A T bust out another thousand!!

 

[JPass]

Maybe throw some seam sealer or silicon on the edges to smooth things out to see if it helps alleviate the cavitation before you cut the existing tunnel out.