Install water pump housing turn driveshaft as you place the housing on top of the impeller.
Yamaha water pump impeller direction.
While trying to get this on i flipped the impeller.
Apply thin coat of multipupose lube to inside of the pump cover.
Be sure the o rings stay in place.
If this water is not.
Straight vane impellers function in either direction.
As you slide the housing down rotate the driveshaft to align the impeller housing with the pump housing until it slides all the way down over the dowel pins.
If you did not notice they were all missing or you forgot then remember that all of these motors rotate clockwise.
Shrouded impellers turn so they scoop the fluid.
You will turn the driveshaft clockwise for standard right hand rotation models.
For these reasons it s best to replace your water pump impeller or the entire water pump assembly when servicing these items and never rotate your outboard s crankshaft or driveshaft in a counterclockwise direction.
Remember the direction of the impeller vanes if any were left on when you initially lifted the housing off.
The rubber impeller is located inside a stainless steel cup and uses the water for lubrication.
This needs to be fixed.
I applied some grease to the slots for the o rings to help hold them in place.
Learn from my mistake and check.
Clean the water pump housing.
Exceptions are pumps with straight vane impellers vanes perpendicular to the shaft and shrouded impellers.
But again since you will be looking at the bottom side of the water pump you will be seeing it backwards.
Impellers must turn in a direction so that the fluid is pushed not scooped through the pump see sample drawing below.
We recommend you buy the complete yamaha water pump repair kit as it includes the various gaskets o rings and other parts that usually need replacing when you repair the water pump it s much cheaper to buy the complete kit than it is to buy the impeller gaskets and o rings separately.
Re install the water pump housing.
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.
I need to take it apart and turn it clockwise.
