Detroit 671 Raw Water Pump rebuild, replace, or Korean

[Vincentc]

I have water leaking out of the stbd 671 ti raw water pump. I have not yet pulled it but am suspecting it will need to be rebuilt or replaced. I just spoke to Depco, and was advised that they could rebuild it which will involve several days shipping each way plus time to rebuild. A rebuild kit from them cost $300 to a little over $450 depending on the need for a new shaft. An aftermarket pump by JMP (Korea) would be a little over $500 vs 900 for a new Jabsco. I hope to pull the pump tonight and hopefully find just where the leak is coming from. Advice on which option to pursue will be appreciated. Thanks

 

[drburke]

Depco took very good care of my dock neighbor with the same issue; he let them rebuild it.

DAN

 

[Boatsb]

Pressing in bearings and seals if you don't have the right tools is a pita. I send my pumps to Depco and they usually turn them around in 24 to 48 hours.

 

[Fanfare]

If your [Korean] pump isn't made in the USA, and it has parts made of either metal or rubber or anything else, you will regret it, probably sooner rather than later.

 

[Vincentc]

Thanks for the good advice. Made in the USA does mean something, especially in a marine enviroment. The aftermarket pump comes with a 12 month warranty. The OEM Jabsco lasted 33 years.

Once I, pull the pump, I will send it off to Depco for rebuild. Tomorrow morning I will probably order the aftermarket pump so that I can finally use the boat this weekend. I would have the rebuilt pump as a spare.

It had been busy here, with little time for boating. Three weeks ago we had a wedding with reception at the house for our youngest daughter. The 2 weeks since called for attending the weddings of daughters of friends/ relatives, and there has been little time for some of the other important things in life.

As a recovering father of the bride, I hesitate to buy a third pump, and then pay to rebuild another, but it is still a fraction of what I spent on such things a flowers, and probably less than what was spent on say, makeup for the bridesmaids. Does the phrase "financially dialated" offend anyone here?

On an important technical point, I removed the inlet and exhaust fitting from the pump and both were full of water. I know I observed water leaking from the bottom of the pump when the engine was running. Is this consistent with a raw water pump in need of rebuild/replacement?

Thanks again.

 

[rwappleton]

Vincent, I know I am late on this one but the PO had put the Korean ones on our boat (same engines) about two years before we bought her. Starboard one gave up and did what you are describing. We got a DD guy out of Clearwater to replace it and the pump was under 200 bucks and made in the USA. It was also the high performance one that the TI requires. They sent the wrong one the first time. We also bought the port side as a spare so we are ready. Good Luck,Russ

 

[rwappleton]

Why does my space bar not work on this site anymore

 

[MikeP]

"On an important technical point, I removed the inlet and exhaust fitting from the pump and both were full of water. I know I observed water leaking from the bottom of the pump when the engine was running. Is this consistent with a raw water pump in need of rebuild/replacement?"

Maybe I'm misunderstanding but the pump's intake and exhaust side would normally have water in them. I pull the impellers for every winter layup and a gallon or more of water comes out of the pump/adjacent plumbing when the cover is removed. I assume, that the leakage to which you refer is not coming from the pump cover, which would indicate a bad gasket/loose bolts/bad mating surface, which is easily repaired...

 

[Vincentc]

Russ,
Interesting you should mention a high performance pump distinction. According to Depco, the serial number I gave them (from the port engine pump) of 5145578 is for listed for smaller engines such as the 353. Regards,

 

[Vincentc]

Interesting how projects can last longer than expected. I completed the pump install, exhaust hose clamp and multiple hose replacements during my Father's Day on the boat (at the dock).

Depco did an excellent job rebuilding the pump with very short turn around. I did not buy the Korean pump but prudently waited for the old pump to be rebuilt. As I get older, the time/money conundrum changes.

Thanks for the advice on Depco and domestic pumps.

 

[Timeout]

I was able to fix mine with this kit from pumpvendor.com:

JA 90019-0001 Jabsco- Minor Service Kit, Contains Impeller, Mechanical Water Seal, Cover Screws and Cover Gasket - $88.90

The mechanical water seal did the trick. Not sure if you have same pump or not.

 

[rwappleton]

Same boat, same engines different pump Sorry Kev!!!!!

 

[Dan Mapes]

We had a drip from the raw water pumps on our 6-71s and have had them rebuilt by Depco. However, I will recommend that you boil out the heat exchanger and coolers as prescribed on this site. Back pressure is probably causing the seals to weep.

 

[Timeout]

Same boat, same engines different pump Sorry Kev!!!!!

I know. Detriot Diesel and J&T built these many different ways. Took me forever to find a replacement fuel cooler which developed a leak (discovered when I changed raw water impellor and fuel came out instead of water). The guys at J&T are usually pretty good, but this one stumped them (sent them a picture to make sure I was getting the correct cooler). Resorted to Google images search to find something close but no match. Fortunately that supplier's web site had a link to their catalog which had the unit I needed in it. Not sure how I ever survived without Google.