old johnson impeller

popsmazz1

Petty Officer 1st Class
Joined
Oct 13, 2006
Messages
276
I would like to replace the water pump impeller on a 1956 ad10 7.5 horse. I dont know how to remove the lower unit, can someone help me out? thanks.
 

F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,196
Re: old johnson impeller

You have to remove the powerhead in order to disconnect the shift rod. After that, it's easy..just the 4 bolts holding the lower unit on. When you reinstall the powerhead you will need a new gasket and please don't ignore the seal assembly at the top of the drive shaft. Always replace the 303355 gasket and 303347 o-ring on that seal assy. Ignore it and water gets into the crankcase and it's good-by motor when it throws a rod. They are too good a motor to waste.
 
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