Older mecury wont pump water

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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Impeller in the water pump worn resulting in decreased pump rate. Replace water pump. Also check the radiator tubes. They may be partially plugged and need to be rodded out. Radiator may look good, no leaks, but if passages are plugged it wont cool properly.

Check here, you'll need the horsepower and lookup the serial-number range...

http://www.iboats.com/basics/serial_number_year.html#mercury

I need more info. Two hose fuel line? If single hose with primer bulb, can you keep it running by pumping primer bulb? Picture would help. Will it idle for longer? Will it go over half throttle?

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

Hi, if the water doesn't drain from your dishwasher, check the drain line and pump..

A clog in the drain line or air gap (if there is one) is the usual reason that a dishwasher won't drain. Often the problem is at the point where the drain line attaches to the garbage disposer or household drain line. If you remove this line, you can clear any debris from the hose or hose connection. Be sure to reattach the hose before starting the dishwasher again.

Your dishwasher pump ejects the water. The pump is usually mounted directly to the motor, then attached to the bottom of the dishwasher. You can reach the pump from inside the dishwasher, but first you need to remove the lower rack, the spray arm, and the spray arm support.
Look for an impeller--a round plastic fan blade-type of device that spins around. This is the wash impeller, which forces the water through the spray arm. Beneath the wash impeller is the drain impeller, which is similar in size and shape to the wash impeller. The drain impeller pushes the water toward the drain port. These components make up the pump. If any of the pump components are defective, you need to replace them.

now a days you have to buy the washers where you bought the impeller ya there only a dime but they will cost you big

Hi, did you buy your engine used? Sounds like your gonna have to get the carb or carbs cleaned. Its possible you could have a stopped up fuel filter, or not enough spark but i am guessing its gonna be the carbs. They got some gunk in em i bet. Probably old fuel turned to gunk from setting up. I had the same problem on my 40 horse.

Put engine in fwd gear. Then disconnect the shift linkage. Remove the bolts that hold the gearcase on and slide gearcase off of the tower. Remove the 4 bolts or screws in the waterpump housing and lift the housong off. Replace the impeller and reassemble in reverse order. Make sure that you get the water tube lined back up and you can twist the prop to line the splines back up in the powerhead.

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