How to check water pump on mercury outboard

Our team of boat enthusiasts will gladly assist you so just give us a call at 877 388-2628 between the hours of 900 AM and 600 PM EST Monday through Friday. Our team of boat enthusiasts will gladly assist you so just give us a call at 877 388-2628 between the hours of 900 AM and 600 PM EST Monday through Friday.

You can check this by pumping the primer bulb until it feels hard.

How to check water pump on mercury outboard. 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 significant damage to the.

The most obvious way to tell if the outboard water pump is failing is to watch for the engine to overheat. However this problem can be caused by a number of issues which is why its vital to test for a bad outboard water pump. How Do You Test an Outboard Water Pump.

On many outboards you can simply put on the muffs and start the engine. Another way to tell is if you can touch the water jackets sides of the cylinder block and keep your handfinger there without it getting so hot you remove your hand. That means water is circulating and cooling.

If you have any doubt however it is always good maintenance to rebuild the pump and replace the impeller every other year. With the lower unit removed you can see the water pump housing. Remove the hardware holding the housing on and lift the housing.

Under the housing youll find the impeller. Remember when installing a new impeller to twist the impeller into the pump housing and ensure that the fins curve in the same direction as the old impeller. Look at the top of the lower unit.

Youll see the water pump surrounding the drive shaft where it enters the lower unit. Remove the bolts that hold the pump housing in place. Pull the pump housing from the drive shaft to expose the impeller.

Lightly grease the metal wear plate and the inside of the water pump housing with marine grease. Reinstall the water pump housing while rotating the driveshaft clockwise as you press it down over the impeller to ensure the impeller blades are oriented in the correct direction inside the housing. You can remove and visually inspect most parts of your clogged outboard but not all.

You can flush the cooling system with fresh water using a garden hose just as you do when you winterize the outboard. But some parts require a different approach. One example is the jets and passages in a carburetor which are small some verging on invisible.

Whats more convenient than using our simple Mercury Direct Online Diagrams to shop from the convenience of your home. Simply enter the original model or serial number assigned to your outboard motor by Mercury Marine. Mercury uses a specific system when assigning either serial or model numbers to their Mercury Outboard Motors however either of these can be used to lookup OEM parts.

351 rows Of course your motors impeller needs to be changed regularly but its also a good idea to. You can check this by pumping the primer bulb until it feels hard. Fuel should travel easily from the tank all the way to the pump.

Your outboard fuel filter located just before the fuel pump should be full. With the engine off and the cowl cover removed remove. Lightly grease the inside of the water pump housing and the top of the wear plate with PTFE marine grease.

Reinstall the water pump housing while rotating the driveshaft clockwise to ensure the impeller blades are turned in the correct direction within the housing. 115 HP 4 stroke water pump issue. I have replaced the water pump impeller on a 2007 115HP 4 stroke Mercury outboard.

When the motor runs it does not seem to pump water. I have taken it apart a few times but see no problem. I have followed the shop manual and replaced the impeller and gaskets.

Clean out the interior of the pump housing checking to make sure that there are no score marks or gouges if there are water may leak past the vanes of the impeller and the pump will not work as efficiently as it should. If there is any doubt as to the condition of the housing then it should be replaced. This Mercury outboard water pump was run dry briefly and the impeller literally melted within the housing.

You can see the imprint of the impeller on the back. In this case the entire water pump. 1999 90 hp Mercury Water Pump repair kit.

Mariner 1999 99 hp 2 stroke water pump issues. 40hp Mariner needs water pump. Carb kit and water pump 2001 25 hp.

This film is all about. Well its pretty much what the title suggests its going to be. I warn you now this doesnt come under the heading of fun but it i.

Run the water and see if you fill the block and it comes out of the tell tale. Then after running for a few minutes remove the thermostat cover and see if the block is filling. If the block doesnt fill the problem is in or under the powerhead.

If it does the problem is the water pump lower unit. Hello all I have recently purchased a predator 165 with a Mariner 60hp EFI outboard 2008 I think. When I viewed the boat the outboard was pumping loads of water when I travelled home with it and started it up a few days after with the muffs on it also was pumping water.

Choosing the right Mercury outboard water pump or Mercury outboard impeller can be a real hassle so go ahead and reach out to one of Wholesale Marines dedicated customer service representatives. Our team of boat enthusiasts will gladly assist you so just give us a call at 877 388-2628 between the hours of 900 AM and 600 PM EST Monday through Friday. Mercury Mariner outboard motors are well known to professional and recreational boaters alike and have a well-deserved reputation for reliability.

One of the few parts that will wear out even in a well-maintained outboard is the water pump. Fortunately it is easy to see when the pump is no longer functioning and. If there is a lack of fuel discharge you might have a bad diaphragm or fuel pump check valve.

Connect your fuel pressure gauge to the pulse hose. Normal fuel pumps will put out between five and seven PSI. Readings below this point to a bad diaphragm or pump check valve.

Water Passage Thru Motor. The water is pushed up from the water pump thru a 38 OD copper tube to the bottom engine cowling where it sets into a 12 dia. Shallow recess that has a 18 plastic seal where the water passage goes into the block.

If you replace the water pump impeller but do not get adequate or irregular cooling water pot the pee.