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-   General Q & A (https://www.offshoreonly.com/forums/general-q-20/)
-   -   525 Seawater pump lube (https://www.offshoreonly.com/forums/general-q/277203-525-seawater-pump-lube.html)

bonesmalon 08-27-2014 09:02 PM
Originally Posted by Biggus (Post 4168346)
It seems that every one of these pumps seem to bleed gasoline into the pump oil. Since there seems to be now way to avoid this, I fill the reservoir with 2 stroke Klotz castor bean oil. (unsurpassed film strength and blends with gas)
+1
Take the time to pull the pump and add a drain to allow easier changing of gear oil in pump.

ozarkdevil 08-27-2014 10:41 PM
Again, is it the norm for fuel pump to bleed gas into sea pump oil or is it a sign of a bad fuel pump.

HyFive578 08-28-2014 07:15 AM
Originally Posted by ozarkdevil (Post 4179317)
Again, is it the norm for fuel pump to bleed gas into sea pump oil or is it a sign of a bad fuel pump.
I don't think that is the intended design, but it seems to be norm. I replaced my sea pumps about a month ago and all three had gas in the oil.

jbraun2828 08-28-2014 08:11 AM
Yes it's normal, happens to everyone. It's just a chitty design. On my old boat I put new fuel pumps on and after one summer, both had gas mixed in the oil. Just change it at least once a year and you will be fine.

ozarkdevil 08-28-2014 09:36 AM
Originally Posted by jbraun2828 (Post 4179428)
Yes it's normal, happens to everyone. It's just a chitty design. On my old boat I put new fuel pumps on and after one summer, both had gas mixed in the oil. Just change it at least once a year and you will be fine.
Ok thanks.
Mine puked the oil out the other day, the pump feels ok but it looks like the front seal popped out of housing. Seems odd the seal would come out. I need to tear it apart for a closer look.

bonesmalon 08-28-2014 07:30 PM
Originally Posted by ozarkdevil (Post 4179317)
Again, is it the norm for fuel pump to bleed gas into sea pump oil or is it a sign of a bad fuel pump.
It's my feeling that some leakage is inherent to the design and the best solution is being able to change the gear oil regularly/easily which is why I added the drains to the sea pump housing.

ozarkdevil 09-04-2014 05:27 PM
When changing oil in sea water pumps what is everyone using for oil?

HyFive578 09-04-2014 05:50 PM
Originally Posted by ozarkdevil (Post 4183155)
When changing oil in sea water pumps what is everyone using for oil?
Mercury High Performance gear lube. that is what the maintenance manual calls for.

Cole2534 09-05-2014 03:55 AM
Though I suspect engine oil would work just as well, that's what lubes the pump foot when it's attached to the engine block.

Biggus 09-06-2014 04:51 PM
Originally Posted by ozarkdevil (Post 4183155)
When changing oil in sea water pumps what is everyone using for oil?
I use straight 2 stroke oil as it's made to be diluted with gas. Seems to work great.


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