[pjv911]

I have a 1996 Wave Venture 1100 for parts. Does anyone know for certain if its a 155mm or 144mm pump?
It is my understanding that a larger pump is best for a heavier craft. I am doing an engine swap in a 700lb jet boat with a 90hp 760 engine (originally a waverunner 3 driveline 650cc 144mm pump).
Before I spend $ sizing and test 144mm impellers I would like to know if I should start out with the 155mm pump and go from there.

Kurt

 

[Ernest T]

I'm pretty sure the 1100 cc WV engines were all paired with the 155mm pump, and the smaller 760 cc engines with the 144. The 1100 engine should work with the 144 pump, but I suspect low end performance would be poor due to increased cavitation, unless you change the prop to something with more aggressive pitch. If you want to avoid the headache of finding a correctly pitched prop, then go with the 155.