drive shaft too tight?

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bob.nordby

Cadet
Joined
Jul 28, 2011
Messages
7
I completed a seal kit on my 1988 50hp evinrude. I can easily turn the drive shaft by hand but as I tighten down the water pump it starts to get more and more difficult to turn by hand. Should it be this hard to turn?
 
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boobie

Supreme Mariner
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Nov 5, 2009
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20,826
Re: drive shaft too tight?

Did you lube the impeller and hsg before installing it ?? Is it assembled correctly ??
 
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bob.nordby

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Jul 28, 2011
Messages
7
Re: drive shaft too tight?

boobie said:
Did you lube the impeller and hsg before installing it ?? Is it assembled correctly ??
Click to expand...

I lubed the impeller but I guess i'll have to take it apart and check that I did that right. Thanks
 
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hotshot123

Petty Officer 3rd Class
Joined
Jul 9, 2009
Messages
98
Re: drive shaft too tight?

Boobie, do you think that he might have let the key get out the bottom of the impeller causing things to bind up when he tightens down? i know just the friction of the rubber should snug up all the free play in the shaft but if it is getting worse when you tighten the bolts then something is out of whack. also wondering if the impeller is too tall or something
 
stylesabu

stylesabu

Master Chief Petty Officer
Joined
Aug 2, 2009
Messages
849
Re: drive shaft too tight?

somethings not right.if you not sure if its the water pump then remove impellar, and reassemble if it spins smoothly then double check your parts and procedure. if its getting hard as you tighten some thing is binding. i went back and re-read op. it will get harder to turn as you tighten ,but if you can still turn with grease hands it should be alright, was there anything wrong with old impellar you could put it back in and see how much drag is on that one
 
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archcycle

Chief Petty Officer
Joined
Sep 21, 2009
Messages
647
Re: drive shaft too tight?

Could you have mis-seated the gasket or something else? If so then the pump housing could sit at an angle so when you tighten it down the housing could be pressing against the drive shaft. Just a thought. I don't have an open one in front of me to see what the tolerances are.
 
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bob.nordby

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Joined
Jul 28, 2011
Messages
7
Re: drive shaft too tight?

archcycle said:
Could you have mis-seated the gasket or something else? If so then the pump housing could sit at an angle so when you tighten it down the housing could be pressing against the drive shaft. Just a thought. I don't have an open one in front of me to see what the tolerances are.
Click to expand...

Thanks every one for all the help. I lifted the impeller housing , checked for any damage and set it back down with a little more care. Everything seems to turn quited nicely now. Now if i can just find that leak in the boat.........
 
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