Water pump impeller change

Question edited for clarity, but needs engine model and HP.
Question moved from Dishwashers.

Some ideas here. Check that the impeller spins (the drive is okay), but it sounds like you have blocked passageways.

https://www.google.com/search?q=1993+Mercury+Outboard+Engine.+Why+is+it+not+peeing

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Look Here!
http://www.boats.net/parts/search/Suzuki/Outboard/1989/DT115/parts.html

Page 108http://marine.honda.com/pdf/manuals/31ZW5600.pdf

have you changed the impeller inside the lower unit.

There is copper pipe to redirect water up into the engine.

When you replaced the impeller make the copper pipe is insert onto the engine.

put it in forward gear. Drop the lower off by releasing the bolts and nuts holding it holding the lower on. (one is hiding under the back pick up screen)- some models had a plug in the back top of the exhaust/intermediate housing hiding an allen head bolt pointing down.

Once released, put a protector in a vise and clamp the lower to the bench.

2 screws or bolts will hold the water pump cover on. (the drive shaft runs thru it) Clean the carbon and rust off the drive shaft will allow the pump housing and impeller off the lower. Retrieve the funny looking key drive which runs the pump.

Inspect the shaft, the lower unit oil for water. and find all the pieces of the water pump impeller which may have gone places they shouldn't have.- including the outlet tube from the power head. Check this by putting a tube on the end and blowing- you should hear and feel the pressure in the exhaust and tell tale hole.

Now take the model number , the old pump parts to the marina for a replacement. Do a side by side comparison at the marina so you get the right stuff. Check the inside drive of the rubber impeller and see if they are exactly the same.

NOW- put the new wear plate / gaskets and drive key on, hold in place with grease. Slide the impeller on the key and spin the drive in both directions to be sure it has the impeller and will securely turn it.

Put grease in the cup of the pump housing to prevent dry start and help seat the impeller blades. Spin the shaft as you lower the housing in the pump so the blades all face in the right direction (clockwise). Screw in the bolts. Grease up the seal the watertube goes in and the spline end of the drive shaft.

Up the hole it all goes, now you only have to spline the shifter (it hasn't moved has it?) The drive shaft and the water tube all at the same time.

Check the shifter for correct position and bolt it down

Okay this is on total memory. The shift shaft for a lot of those engines goes right up through the pilot shaft and exits just in front of the block under the carburetor(s). You will see the **** linkage arm connected to this shaft sometimes it's double nutted. See if you can slide the lower unit back up to the housing and put a bolt in it to hold then undue the shift shaft linkage, Remove the bolt and drop the lower unit. Be careful of the water tubes and check make sure the rubber grommets are in place in the pump housing not on the tubes. Clean up the pump housing and install the new impeller kit.
Put the impeller down the shaft on top of the impeller plate, lightly grease the inside of the housing the impeller plate and impeller. Then lower the pump housing down to the impeller while turning the drive shaft clockwise lightly push down on the impeller housing. This will fold the impeller blades all in the correct position and provide lubrication to the pump until the water gets into the pump. To make life easier re-grease the drive shaft spline and the water tube grommets this will ad ease in reinstalling the lower unit. be careful to make sure you thread the drive shaft, water tubes and shift shaft all in at the same time. After installation you may find you need to adjust the **** linkage.

mcdevito75 Here, If I;m not mistaken the water pump is in the lower houseing, a big job, let the marina take care of it as the water pump should be Changed only if it doesn"t pump at all.

get the kit from boat shop all it takes is four bolts and remove the lower housing.. when you put the impeller in... flex the blade the same way take a photo before you take it apart...inside get a new gasket for between the upper and lower housing too...

goto local library get book on unit!!! :)

It is located inside the lower unit housing. They are fairly easy to replace. Most Mercury authorized service stations will charge around $120 for this task.

Triton72