water pump # mercruiser120

[bigskiohio]

i was getting oil out of exhaust in driveway so i removed and split. I pressure tested lower and no leaks. so i figure quad ring was leaking, took me awhile to figure how to plug oil port. Checked water pump one fin broke so i need new pump. i want whole pump and base , but i need a part #.
1973 120.

 

[Bt Doctur]

Re: water pump # mercruiser120

A serial number would be more helpful but you should have a Series 1 type so this number should work.
46-96148A8 , Sierra 18-3317

 

[bigskiohio]

Re: water pump # mercruiser120

i just ordered the the seirra one from iboats thanx the mercruiser was twice the price so i thought i would take a chance on seirra.
Had one blade gone but still cooled okay, but ihad water in oil and oil out of exhaust. will pressure test upper friday. what is used to plug the oil port when you test?

 

[achris]

Re: water pump # mercruiser120

... so i thought i would take a chance on seirra.
...

This always amuses me... Someone willing to risk how many ever thousands of dollars, to repair an engine after a cheap impeller let go.... All to save $35.... Does the Sierra warranty cover consequential damage? I realize that most people will not have a problem... But do you really want to be the one that does?

Chris.......

 

[bigskiohio]

Re: water pump # mercruiser120

I have not heard anything bad on sierra .I used a off brand coupler and no problems yet .actually i willl save 60.00 as i wanted bottom too. I drive and watch gauges constantly so not to worried. Lost my job of 18 yrs so gotta save where i can as much as i would like to by merc parts. But even when i order merc might end up sierra anyways as alot of websites dont specify what you get.

 

[havasuboatman]

Re: water pump # mercruiser120

Make sure you get that blade that broke off out of the system. You don't want that lodgine in the oil cooler and restricting water flow.

 

[bigskiohio]

Re: water pump # mercruiser120

already dug it out, boat cooled perfectly ran 140-165. By the seal wear on shafts this outdrive will be replaced sometime in the near future.

 

[bigskiohio]

Re: water pump # mercruiser120

pressure tested top half no leaks.

 

[achris]

Re: water pump # mercruiser120

... By the seal wear on shafts this outdrive will be replaced sometime in the near future.

If you're talking about the seal surface below the water pump, have a look at SPEEDI-SLEEVES. I have used them quiet a bit and saved plenty of money...

 

[ziggy]

Re: water pump # mercruiser120

i've used a speedi sleeve on the top of the drive shaft too. only thing about that was it needs to be put on after ya put the impeller on as the impeller wouldn't slide over the speedi sleeve. at least not with the one i did.
most recent thing i did for seal wear at the top of the drive shaft was to R&R the very bottom seal in the upper and when reinstalling, drop it off at a slightly different location. i did that last year and while inspecting it this year, it seems i was successful as it looked like i could see where the seal was riding just above the groove in the shaft from previous seal wear. that seal didn't get replaced this year.