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Socket used for spinning crank shaft to test water pump

D

Dante

New member
I posted a forum about my water pump replacement and as a result my engine overheating after I replaced old water pump and installed new water pump. Old water pump ran fine and engine did not overheat. Replacement was just for good measure as I run in salt and was 2 years old.

Someone posted in in response to my issues with new water pump that I can test water pump in a tank by pulling off lower unit, suspending in water and turni crank shaft with socket and drill.

what size socket so I use to turn my crank shaft. 13/16 is to small and 7/8 is too big. 21mm is too small. I don't have a 22mm socket although I'm sure I could find one.

Anyone know th socket size of any other way to test just the water pump.
 
Factory supplies special " splined " sockets for turning the driveshaft.-----Did you make sure the watertube engaged the guide tube when putting the lower back on ?--------Did you make sure that the drive key for the impeller was in place ??
 
I would like to know what type drill also as a 1/2 Skil 300/900 rpm has a hard time turning a V-4/6 impeller...got a t-shirt and nothing wrong with drill.
 
Yes I did make sure the water tube slid into water pump gasket when putting lower unit back on

yes I also made sure the drive key for impeller was in place.

I reinstalled water pump 4-5 times so I'm a pro now. Unless I completely missed something which is a small possibility. I just figured something else was wrong as I felt really good about water pump replacement.
 
What motor are you working on ?-----Ok-So tape some pins ( nails ? ) in place on the spline and experiment till you find a socket that will drive it.-------------Nearly 50 years of repairs and have never tested a pump with a drill.----------They are too simple to need testing in such a way !
 
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Im working on j115tsxexm. 1998 115 hp johnson

genus idea. Ill give it a shot. Just looking for a way to know 100% the water pump is working as I am not a mechanic and have never replaced a water pump before this one.
 
Before you search for a socket.......... You're speaking of a metal article, submerged in water, and attaching a tool to it that has at least 110 volts of alternating current fed to it, then while holding onto that tool.... turn the power switch to the ON position?..... REALLY?
 
When the engine overheated.....was the water pump fully submerged?
I have considered the "drill" approach....but, never got it to work.
Try a cordless drill.
 
Did you squirt a little dish soap on the impeller and turn the driveshaft clockwise when pressing down on the impeller housing.? I have hear from others it works on the larger shafts just use a short chunk of hose and two hose clamps and clamp a socket in the hose. I never tried on a large gearbox but works great for 50hp and below.
 
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If you can find a battery operated drill that will work, that's fine. But stay away from the 110 volt. Years ago I would use this test when I had a water pump problem and it would eliminate one problem area.
 
As long as you have a good condition drill it shouldn't be an issue, even if you have your foot in the bucket. Just don't drop the drill in it!
 
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