Which Way Should Impeller Spin?

JtJr09

Cadet
Joined
Jul 6, 2008
Messages
21
Hi installing a new water pump in my 1989 Mariner 40hp. The old impeller was in really bad shape. Which way does the impeller spin? Need to know so I can put the new impeller in the housing correctly.
 

racerone

Supreme Mariner
Joined
Dec 28, 2013
Messages
36,047
You put the impeller on the shaft.-------Make sure that key is driving the impeller.-------Then lower the housing onto the impeller.------Turn shaft the way the motor turns it and push down on the housing.--------Nothing to it.
 

gm280

Supreme Mariner
Joined
Jun 26, 2011
Messages
14,585
Follow racerone's instructions and you will be okay. However, if for chance you install it incorrect and it is now sealed up. Don't worry either because as soon as you crank the engine the fins will turn to the correct positions near instantly...
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
27,036
Normally the driveshaft turns CW, looking from the top.I lube up the impeller cup, and as I push down on the upper waterpump, I turn the driveshaft CW and the impeller bends and goes into the cup and housing.
 
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