Raw Water Pump Leak- Fixed

[FreeBeeTony]

After coming back from fishing, I noticed salt spray inside the engine compartment when I went to shut the batteries off.

Looks like the raw water pump (belt driven on the engine) is leaking right behind the pulley.

I was planning on taking tomorrow off and going fishing but looks like my plans might change.

Is this something I can do with the boat in the water? Is there a seal I can replace?

I will also check my manual.............running out to a family function.

 

[Fishermark]

Re: Raw Water Pump Leak

Re: Raw Water Pump Leak

I've changed the impeller on my engine mounted raw water pump a couple of times - never had to worry about it leaking.... sorry I cannot be of further help in that regard. Is your pickup thru the hull or drawn through your outdrive? Do you have a valve to shut off the water? If your pump is below the water line you will need to be careful with the flooding of course.

 

[Don S]

Re: Raw Water Pump Leak

Re: Raw Water Pump Leak

Just plug the inlet hose and you can remove the pump in the water with no problem.
There are a couple of seals in there, along with bearings that the water has to go thru when they leak. In salt water, the tend to freeze (rust) up when they start leaking like that.

 

[FreeBeeTony]

Re: Raw Water Pump Leak

Re: Raw Water Pump Leak

Hi Don..........I replaced the impeller and o-rings when I installed the longblock last fall..........is there a rebuild kit that includes seals/bearings? Or will I have to replace the entire assembly?

 

[Don S]

Re: Raw Water Pump Leak

Re: Raw Water Pump Leak

There isn't a kit that I know of, you would need the 2 bearings and 2 seals. Those seals aren't the orings you replaced while doing the impeller, they are like oil seals.
Those pumps run about 500 bucks anymore.

 

[FreeBeeTony]

Re: Raw Water Pump Leak

Re: Raw Water Pump Leak

$500???????????

No other way to fix?

 

[Don S]

Re: Raw Water Pump Leak

Re: Raw Water Pump Leak

Yea, replace the seals and bearings.

 

[FreeBeeTony]

Re: Raw Water Pump Leak

Re: Raw Water Pump Leak

Are the seals/bearings available?
Any special tools required?

Doesn't look too easy to remove the pump either........the only adjustment for belt tension I see is on a bracket located on the other side of the enbgine near the alternator.....and the hoses aren't very accesible either..........

Would you suggest I just bite the bullet and repalce the entire pump?

 

[FreeBeeTony]

Re: Raw Water Pump Leak

Re: Raw Water Pump Leak

Are the seals/bearings readily available?

Can they be ordered online?

Would a mercruiser dealer carry them in stock???

 

[Don S]

Re: Raw Water Pump Leak

Re: Raw Water Pump Leak

The seals and bearings are available, (PS: you also need item 13, the quad ring) along with the other seals and bearings mentioned earlier.
Places online or locally that are Merc dealers will either have them or can order them. That pump was used for MANY years.
Here is a link to manual 24 http://www-alt.mercurymarine.com/mnetdata/SERVICE/CRUISER/Servmanl/24/24covr1.pdf
Starting on page 6A12 it details how to rebuild the pump. Best thing is to read thru it and see if you can do the job and have the tools necessary.

 

[FreeBeeTony]

Re: Raw Water Pump Leak

Re: Raw Water Pump Leak

Thanks Don............that's just what I was looking for but.............the link doesn't work for me.

 

[Don S]

Re: Raw Water Pump Leak

Re: Raw Water Pump Leak

Give it some time, it works, the download is about 13MB and may take awhile depending on your connection. What oem manual do you have for your engine?

 

[FreeBeeTony]

Re: Raw Water Pump Leak

Re: Raw Water Pump Leak

Seems like there is a problem with the website, doesn't connect...........I have manual number 15 for the engine

 

[Don S]

Re: Raw Water Pump Leak

Re: Raw Water Pump Leak

I just tried the site again and it does work. And, I downloaded the whole manual from the link I posted above. Sounds a lot like either your AV software, or some anti spam or some other type blocking software.

http://forums.iboats.com/showthread.php?t=251571

Above is the link to all the manuals. They do work. Check them out for yourself.

 

[Don S]

Re: Raw Water Pump Leak

Re: Raw Water Pump Leak

Look in your manual............

Section 6A

 

[FreeBeeTony]

Re: Raw Water Pump Leak

Re: Raw Water Pump Leak

Thanks Don............Section 6A explains it all............I was looking at 6B!

Not sure if I will have the ability to remove/replace the seals and bearings w/o a press..........

May just need to spen the extra $$...........I see the entire pump online for ~$350............

 

[Bondo]

Re: Raw Water Pump Leak

Re: Raw Water Pump Leak

Ayuh,.... Sorry to hear your Bad news Tony,....

I guess you'll be going to Work tomorrow,..?? Huh,..??

I pulled My barge this afternoon,....
I might trailer it to the Big river for Muskies yet,... Donno,... No Time....

 

[FreeBeeTony]

Re: Raw Water Pump Leak

Re: Raw Water Pump Leak

Hey Bondo...............nah....I'm not going to work.........gonna go down to the boat and pull that SOB pump!!!!

If the local dealer has one available I might just buy it and be done with it........wanna get out there again next w/e for stripers.........caught a 29"'er today!!!!

 

[bolo78910]

Re: Raw Water Pump Leak

Re: Raw Water Pump Leak

hey tony how about black fish in your area, we have a blast with them sat on the Rockaway reef. hurry up and fix that boat, its fall run time, = big stripers lol good luck fixing your boat,

 

[FreeBeeTony]

Re: Raw Water Pump Leak- Fixed!

Re: Raw Water Pump Leak- Fixed!

Fixed.........was down at the boat by 7:30 this morning........removed the old pump, went to the dealer and, $400 later.........I have a new raw water pump!

So much for a trouble freee season!!!! At least it's better than a blown engine!!!