Oem drive shaft, Setback, cutback

[yoav240]

Hi Guys
Could anyone explain me the difference between Oem drive shaft, Setback drive shaft, cutback drive shaft ?
thanks

 

[Robbie8984]

OEM is original equipment manufacture’ so say a genuine Yamaha Drive shaft.

Set back shafts are longer. They are for after market pumps that have the stator section ‘set back’ further in the pump housing but still use the same mounting points etc if that makes sense.

 

[mikidymac]

Pretty sure the 1996-2007 use a shorter shaft than 2008+ if we are talking stock superjets.

 

[yoav240]

Do The setback and the cutback give you more power or its only need to install because the after market pump ?

 

[Robbie8984]

You can only install a set back drive shaft in a set back pump, they put more water in front of the impeller and load better.


This is my setback Maxx 160 fitted to an XFS Comp.

Can you see how far back the impeller is in the housing.

 

[TheBuzzard]

there aint no such thing as a cutback shaft. a cutback prop has been machined off so the hub will sit farther back and closer to the stator veins. the less distance between the trailing prop edge and the stator veins, means less prop slippage and greater pump efficiency. also makes the prop act like a higher pitch prop since it slips less.
a setback pump puts thinner stator veins farther back. thinner veins creates less water friction than a 3" vein. also requires a setback shaft since the bearings are only 1" apart as opposed to 3" apart. a setback shaft is about 2" longer on the front spline side and the back gets cut off 2" since the vein and bearing section is 2" thinner and the bearings are only 1" apart.

 

[yoav240]

thanks I am willy appreciate