Hi everyone. This is my first post on this forum. I've lurked here for a month or so trying to learn about an overheating problem I've had. I think that I've got that figured out thanks to all the great knowledge found on this forum, but now I've come to a point where I need to ask a question (I did search the forum first)
1994 90HP Evinrude
Along the way, I've pulled the water pump apart. The motor was long overdue for an impeller change, and it was done by a shop in the past, so I decided to do it myself this time. Upon removing the pump housing, I see there is noticeable wear on the drive shaft about 5/8 inch above the top of the impeller. The groove does not correspond to the top of the stainless steel cup, but appear to correspond to a place where the plastic of the pump housing closes in on the shaft about 1/2 inch above the cup. When I place the unattached pump housing back on the shaft (but not completely back over the impeller, which is still in it's original place) there is some slop between the housing and the shaft.
As I examine a parts diagram online, such as
http://www.boats.net/parts/search/BRP/EVINRUDE/1994/E90TLERC%201994/GEARCASE/parts.html
I see there is an O-ring located above the steel cup (#78 in diagram), but it's not clear exactly where it will go. Currently I see no evidence of an O-ring in that area of my pump, although I've yet to pull the cup out of the housing. I would think something is supposed to be in there to seal water from exiting the top of the water pump housing along the drive shaft.
Can anyone tell me more specifically where this O-ring should be located? I'm hoping not on the worn area of the shaft.
Thanks!
1994 90HP Evinrude
Along the way, I've pulled the water pump apart. The motor was long overdue for an impeller change, and it was done by a shop in the past, so I decided to do it myself this time. Upon removing the pump housing, I see there is noticeable wear on the drive shaft about 5/8 inch above the top of the impeller. The groove does not correspond to the top of the stainless steel cup, but appear to correspond to a place where the plastic of the pump housing closes in on the shaft about 1/2 inch above the cup. When I place the unattached pump housing back on the shaft (but not completely back over the impeller, which is still in it's original place) there is some slop between the housing and the shaft.
As I examine a parts diagram online, such as
http://www.boats.net/parts/search/BRP/EVINRUDE/1994/E90TLERC%201994/GEARCASE/parts.html
I see there is an O-ring located above the steel cup (#78 in diagram), but it's not clear exactly where it will go. Currently I see no evidence of an O-ring in that area of my pump, although I've yet to pull the cup out of the housing. I would think something is supposed to be in there to seal water from exiting the top of the water pump housing along the drive shaft.
Can anyone tell me more specifically where this O-ring should be located? I'm hoping not on the worn area of the shaft.
Thanks!
