1980 25hp johnson, squeeling noise

[tagunderson]

I have 1980 25hp Johnson motor that runs great except for after running at slow speed for a while the motor begins to make a squeeling noise, it does not do this at higher speeds! Is this a worn water pump impellor? if so, what does changing this involve? other than that the motor runs extreemely well. Any help will be very appreciated.<br />Thank you<br />Tom G.

 

[JB]

Re: 1980 25hp johnson, squeeling noise

Hi, Tom.<br /><br />Welcome to the board.<br /><br />If you change speeds does the squealing change pitch?

 

[tagunderson]

Re: 1980 25hp johnson, squeeling noise

Hi, <br />I made a typo, its a 35 hp motor, and the squeeling goes away as soon as the RPM's go up, ALso I noticed that at Idle the pump is not pumping water throught the motor, I have purchesed the new inpellor and plan on installing it this weekend, I am also wondering what it involves, I am guessing just unbolt the lower half of the lower unit, and drop it down, is there anything I need to do with the shifting shaft??? or anything else?<br /><br />Thanks for the fast reply.<br /><br />Tom