replacing impeller?

[patrick4266]

1972-85hp rude. I want to replace impeller. The manual says it takes 675 lbs torque to take off the propeller nut is that right? Also is it a big job to change the impeller, How much disassembly do i have to do with the lower unit?

 

[Chris1956]

Re: replacing impeller?

Patrick, You do not need to remove the prop to replace the waterpump impeller. Also, I think the manual is off by a factor of 10 on that torque value. 67 ft-lbs is much more likely.

You will need a service manual to guide your work in replacing the impeller. You will need to disconnect the shift rod and drop the lower unit to get at the waterpump.

 

[mtsumedi]

Re: replacing impeller?

675 lbs of torque!! That thing would need a hopped up turbo diesel powered impact gun to get the nut off!

 

[F_R]

Re: replacing impeller?

Could that be INCH/lbs? Still seems like a lot.

 

[ezeke]

Re: replacing impeller?

The number that show in the torque chart is the force necessary to overcome reverse lock.

Use 120 inch pounds on the prop nut.

 

[patrick4266]

Re: replacing impeller?

Thanks guys, the admiral is right it says to over come the reverse lock. I thinking how in the hell am I going to generate 675 lbs of torque?

 

[HighTrim]

Re: replacing impeller?

I realize most dont, but I always take my prop off when changing the impeller. First, because I am normally alone, and dont feel like taking the chance of damaging my prop. Secondly, because I feel that is a good time to clean up any old fishing line wrapped around my prop shaft, and to grease the prop shaft splines.

 

[patrick4266]

Re: replacing impeller?

Thanks Chris, I was planning on doing that as I know nothing at all about this motor. I got it from a guy who got from another guy who said another guy said it used to run. Anyway I got it running and it sounds real good. I went and bought a impeller today and am going to replace it in a few days as soon as the weather here in St louis warms up. I want to be able to go fishing about next month and since I will be on the mississippi I do not want to break down.

 

[HighTrim]

Re: replacing impeller?

Excuse me, was referring to changing the impeller, not the lu oil!

I edited my last post.