Mercury outboard water pump impeller direction

How to determine pump rotation by impeller design. Flip a yamaha impeller up side down.

We need to remove this plate also so if it stays stuck in place you may need to pry it up very carefully.

Mercury outboard water pump impeller direction. What does a water pump impeller do. Xinpin Outboard Motor Water Pump Impeller Replacement Fit for Mercury 99HP 15HP 47-F436065-2 RM40 RM562 100 Authentic Guarantee. Which direction does the impeller go.

When inserting an impeller be sure to use durable water proof grease or other. Be sure you spin it in the. Which Direction to Curve Water Pump Impeller Blades The driveshaft rotates clockwise when viewed from the top.

Therefore the blades should point to the left or counterclockwise. They will be dragged around so they do NOT point in the direction of rotation. In most cases it doesnt matter because they will flip once the engine is started.

Apply thin coat of Multipupose Lube to inside of the pump cover. Slide the assembled water pump down over the diveshaft and water pump studs. Rotate the drive-shaft CLOCKWISE and at the same time push down on the pump cover to ease entry of the impeller into the cover.

If you do this correctly the arms of the impeller will curve to the left. Press the pump housing cover onto the blades as you turn the driveshaft clockwise. Flip a yamaha impeller up side down.

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 was replaced.

When the impeller fails the pump cant pump. How to determine pump rotation by impeller design. Impellers must turn in a direction so that the fluid is pushed not scooped through the pump see sample drawing below.

Exceptions are pumps with straight vane impellers vanes perpendicular to the shaft and shrouded impellers. Straight vane impellers function in either direction. Shrouded impellers turn so they scoop the.

This video includes step by step instructions regarding. Its good outboard maintenance pr. Separate the housing and slide it up the shaft.

You can see in this picture that the bottom plate is coming off with it. We need to remove this plate also so if it stays stuck in place you may need to pry it up very carefully. All in all the pump was in pretty good shape all the vanes on the impeller are intact.

While a helper pushes down on the housing turn the driveshaft clockwise to turn the impeller blades in the correct direction and slide the housing down over the impeller itself. Slide the lower motor housing back into place on the upper motor housing connect the wiring and replace the mounting bolts to mount the two housings back together. Pull off a rubber cap on the side of the bottom of the drive leg and undo a screw that joins the two parts of the gear linkage.

Undo two bolts and take off lower section of drive unit. Another 4 bolts then become visible on a small casing over impeller. Undo and take out impeller and metal ring in which it runs.

Remove the four bolts that hold the water pump assembly in place Note. There may be a fifth bolt located above the propeller depending on your outboard model. Remove the water pump housing.

Remove the impeller including the two 2 nylon washers located above and below the impeller. In this video I cover the replacement of my outboard engine impeller. Replace the water pump impeller in my Mercury 75 hp outboard motor.

When the water pump fails on a Mercury outboard the impeller is usually to blame. Watch the video above and follow the steps below to replace the impeller and repair the water pump on a Mercury Tracker 25 outboard. We worked on a Mercury Tracker 25EL but the method for repairing the water pump is the same or similar for most outboard motors.

Smear a thin film of grease inside the water pump housing and install the housing over the driveshaft and the impeller. Rotate the driveshaft clockwise as you push the housing over the impeller to ensure the impellers blades are in the correct direction within the housing. Pictures of a new impeller for 70 horse Yamaha outboard and one I just replaced on the water pump of a C32 Acert Caterpillar Diesel marine engine.

I replace both every two years or sooner depending on engine hours. The CAT impeller costs 700 a complete pump. Cover the replacement impeller with petroleum jelly.

This helps ease the impellor in but also acts as initial lubrication as the pump will not be full of water during initial startup. Tie an electrical cable-tie around the impeller. Tighten the cable-tie down until it draws in the impeller vanes into a contracted shape but not overly.

To do that we put the key in place in the slot on the drive shaft take the impeller slide it down the drive shaft and align the keyway on the impeller to the keyway on the shaft. Now were going to install the housing were going to spray just a little bit of lubricant just to lube that impeller until we get water on it. The water pump is a device that utilizes a rubber impeller to draw water up through the engine housing and into the engine compartment to cool the engine.

And a common maintenance practice for Mercury outboards is called water pump replacement which could be performed in a matter of minutes by a seasoned pro or under half an hour by a novice. Putting a new water pump on your Mercury outboard means tinkering with the engines peripheral workings that well keep it working. The pumps driven by the same drive shaft that drives the propeller and the pump itself is little more than an impeller in a housing with a couple of gaskets.

4 - Water Pump Impeller 5 - Impeller Drive Key 6 - Water Pump Base Plate Gasket 7 - Water Pump Cover Gasket Installing Outboard on Boat Transom IMPORTANT. The outboard can be secured to the boat transom using optional Quicksilver Acces-sory Outboard Mounting Kit c PN 812432A5 to allow for quick removal and installation of out-board.