Another impeller replacement question

[nola mike]

alpha 1/gen 1 drive. looking at manual #6, the impeller should be installed with the splines curving counter clockwise. it appears the shaft also spins CCW, which would make the tip of the impeller blades lead (forming a concave surface) rather than sweep/follow (convex surface). seems backward to me. is this correct?

 

[Fl_Richard]

Re: Another impeller replacement question

For what it's worth - I know with a regular outboard the impeller will always fix itself during use.

 

[HT32BSX115]

Re: Another impeller replacement question

Yeah, regardless of how you put it in, the blade tips will "trail" after it starts turning.

 

[nola mike]

Re: Another impeller replacement question

am i misreading the manual then? why would it specify that the blades point CCW? oh--unless the shaft actually turns clockwise. i think that may be it...

 

[Rocky_Road]

Re: Another impeller replacement question

alpha 1/gen 1 drive. looking at manual #6, the impeller should be installed with the splines curving counter clockwise. it appears the shaft also spins CCW, which would make the tip of the impeller blades lead (forming a concave surface) rather than sweep/follow (convex surface). seems backward to me. is this correct?

You should be turning the drive shaft CLOCKWISE (CW) while lowering the pump housing over the impeller.

That is the proper way to 'set' the impeller vanes.

Happy boating!

 

[tractoman]

Re: Another impeller replacement question

If the blades point CCW at the tips say, and the drive shaft turns CW, then you got it. The tips trail the hub of the impeller.

 

[jerryjerry05]

Re: Another impeller replacement question

Commander said it: It will orient itself when you start the motor.J

 

[Gary H NC]

Re: Another impeller replacement question

If the blades point CCW at the tips say, and the drive shaft turns CW, then you got it. The tips trail the hub of the impeller.

Also correct!

 

[nola mike]

Re: Another impeller replacement question

i didn't trust it orienting itself. i just took it back apart and installed correctly for peace of mind. now off to build a pressure tester...

 

[fishinpa]

Re: Another impeller replacement question

i didn't trust it orienting itself. i just took it back apart and installed correctly for peace of mind. now off to build a pressure tester...

Most sensible thing ive heard about the orientation.

Install it right and forget it !


fish