Yanmar 3GM30F Raw Water Drip

[George P]

Need advice,
Recently, I noticed that the water pump">raw water pump on my 3GM30F yanmar has a slow drip from beneath the housing from what looks like a weep hole.

Is this something I should be worried about?

Thanks
George P

[Tellie]

Originally Posted by George P

Need advice,
Recently, I noticed that the raw water pump on my 3GM30F yanmar has a slow drip from beneath the housing from what looks like a weep hole.

Is this something I should be worried about?

Thanks
George P

Worried...No
Fix it...Yes

[imagine2frolic]

The weep hole is there to warn you of a worn part.....i2f

[George P]

Thanks for the quick responses. I had a feeling that the weep hole was there just for that reason. I'll start my pump search.
Thanks Again
George P

[speciald@ocens.]

Sounds like your seals in the pump need to be replaced. The weep hole is there for a reason - it tells you when the seals are shot.

[George P]

Speciald@ocens.

Are you saying that I can replace the seals only? Reason I ask is that an new pump is about $400 to $500!!
Thanks
George P

[Chief Engineer]

The most common cause for this failure is the belt being too tight.

This causes a side load on the pump and alternator leading to bearing/seal failure.

All too often people put a bar and pry the alternator till the belt is "bar tight".

That is not the way it is done.

I am hesitant to post the proper method due to liability issues.....ask your local mechanic and tell us what he says....I will agree or disagree with you.

[Evan]

Seals are gone. It's a relatively straightforward fix

[GordMay]

Originally Posted by Chief Engineer

The most common cause for this failure is the belt being too tight.
This causes a side load on the pump and alternator leading to bearing/seal failure...

The proper tension for a V-Belt drive is the lowest tension at which the belts won't slip, under peak load conditions. Because drive belts stretch over time; they need to be checked & re-tensioned after operating (for 15 min to 2 hours) under load.

See also:
➥ http://www.cruisersforum.com/gallery...r&imageuser=79
➥ http://www.cruisersforum.com/gallery...r&imageuser=79

And an on-line belt tension calculator
➥ Notes on Pulleys and Belts

[imagine2frolic]

Originally Posted by Chief Engineer

The most common cause for this failure is the belt being too tight.

This causes a side load on the pump and alternator leading to bearing/seal failure.

All too often people put a bar and pry the alternator till the belt is "bar tight".

That is not the way it is done.

I am hesitant to post the proper method due to liability issues.....ask your local mechanic and tell us what he says....I will agree or disagree with you.

Chief I understand your concern. It shames to me that my country has come to this. In my own business I have to word everything correctly, and put it in writing to protect myself. What have we done to ourselves I ask myself at times........i2f

[Tellie]

Originally Posted by imagine2frolic

Chief I understand your concern. It shames to me that my country has come to this. In my own business I have to word everything correctly, and put it in writing to protect myself. What have we done to ourselves I ask myself at times........i2f

Lawyers....

[Chief Engineer]

Originally Posted by Tellie

Lawyers....

But I won't work on a lawyers boat...or a Phd in Education.....The latter always want to be addressed as "Doctor" while my Physician customers insist on me calling them by their first name....

[motion30]

Originally Posted by George P

Speciald@ocens.

Are you saying that I can replace the seals only? Reason I ask is that an new pump is about $400 to $500!!
Thanks
George P

Seals AND bearing!

[Badsanta]

You can buy a rebuild kit.

[Chief Engineer]

www.depcopump.com

That's who I use.

Good folks, excellent delivery time.