Replacing water pump on mercury outboard

If the impeller blades do not spring back into position easily or show wear and cracks in the rubber you will need to replace it with the new impeller from your water pump kit. 175 mercury water pump replacement - installing lower unit.

Do no use oil or silicone which can attack the composition of the impeller and lead to premature failure.

Replacing water pump on mercury outboard. How to service and replace your water pump impeller on a mercury outboard. 75hp 90hp 115hp 125hpLarger Optimax outboards run the same water pump as do M. Grease the inside of the new pump housing with white marine grease.

Use a bit of grease on the Woodruff key and return the key to the driveshaft. Put the impeller into place on the driveshaft. Apply Perfect Seal to the threads of the pump housing bolts thread the housing bolts through the bores in the pump housing and into the lower unit.

Replacing the water pump on a Mercury 40HP 2-stroke outboard engine is similar to changing the water pump on a 4-stroke. However if you want to see it done on a 4-stroke as well watch the video above to see how to replace the water pump on a Mercury 40HP 4-stroke outboard. 50 HP MERCURY OUTBOARD WATER PUMP IMPELLER REPLACE - YouTube.

175 mercury water pump replacement - installing lower unit. Get both the lower unit and the engine in neutral. Try to push up the lower unit until it wont go any further then push the gearshift into forward.

Itll usually slide on up when you kick it in gear. How Much Does it Cost to Replace an Outboard Water Pump. You can purchase most water pump repair kits for under 100 which include the impeller.

If you can install this yourself you would save a lot of money. Otherwise a shop might charge you an hour or two which could result in an hourly rate from 100 to 350 depending on where you take it. A little glycerin or dish washing liquid makes getting the pump cover on that little bit easier and provides some lubrication for the second or two until the water gets into the pump and lubricates the vanes.

Do no use oil or silicone which can attack the composition of the impeller and lead to premature failure. Is your Mercury outboard water pump not functioning like it used to. A water pump is a vital component of your outboard that can cause several serious performance issues when it fails.

Because a bad outboard water pump will produce lower water pressure than normal operation you may experience overheating restrictions to available RPMs and eventually. Apply a thread-locker to the threads on the pumps four bolts and thread the bolts into place. Torque the bolts to 50 pound-inches.

Apply white marine grease to a new water pump tube seal from the pump kit and push the seal into the recess in the water pump cover. Slide the water tube guide over the seal. Install the new the rubber water tube seal included in the water pump repair kit onto the top of the water pump assembly and youre done.

Watch the clip below to see the water pump replacement segment of our Mercury 40HP water pump repair video. Slide the impeller housing up over the driveshaft and pull the impeller out of the housing to examine it. If the impeller blades do not spring back into position easily or show wear and cracks in the rubber you will need to replace it with the new impeller from your water pump kit.

Slide the new seal down over the shaft until it just rests against the pump housing. A setting tool is included in the kit and this is pushed down on top of the seal and does double duty of spreading it out and ensuring that it is not compressed too much. With the seal thus set the compression tool is then removed.

Mercury 110 98HP Water Pump Replacement Greetings from Australia saw your questions posted on web site had a few of my own. The 75 and 98 Mercurys come in short and longshaft. My old 98 has a two piece drive shaft.

By removing the 8 upper drive shaft the leg can be reassembled as a short shaft. The maintenance schedule for the 150-hp Mercury outboard motor calls for replacing the water pumps impeller after every 100 hours of operation or once a year. Unlike many of Mercurys larger motors the lower unit found on this model is equipped with a water pump housing that uses a replaceable cartridge.

When you replace the water pump you need to be 100 positive the water tube guide the plastic cylinder guides the copper water tube into the water pump. Double check the key is properly in the impeller. If you are sure of these then you probably either have a blockage in the adapter plate under the powerhead or a faulty poppet valve.

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