1979 Morgan 38. Yanmar 3qm30f

[blue by u]

I know I seen some post on here but I finally have got that wall on my journeys of sailing love may water pump has gone and now I’m not sure what to do looking for advice as I need to get to a dry doc and figure somthing out after I get moving but what are people replacing this pump with as I’m kinda in distress ancared in a cove and would not like to leave my love here for long period of time but I’m asuming some one has had a fix hopfully

Thanks greatly in advance.

And does any one know the flow rate of this pump or the. Cooling system as well does it go though a heat exchanger or just internal engin flow system

 

[DGA]

A water pump is an engine specific part and is not rebuildable, well, parts to rebuild it aren't available and a press would be needed anyway. Not much choice but to find a part supplier and buy a new one, sorry. If it's just leaking past the shaft seal, it will still pump, put it back on, sealant on the old gasket, and keep the coolant topped up occasionally, and you should make it short distances just fine.

 

[blue by u]

A water pump is an engine specific part and is not rebuildable, well, parts to rebuild it aren't available and a press would be needed anyway. Not much choice but to find a part supplier and buy a new one, sorry. If it's just leaking past the shaft seal, it will still pump, put it back on, sealant on the old gasket, and keep the coolant topped up occasionally, and you should make it short distances just fine.

Well I’ve tryed almost every we’re and no luck at all on finding one so looking at alternative solutions at this time that will work and figure out the flow rates is main part I’m trying to find do a different belt driven pump or maby looking at a electric solution if possible

 

[Warren Holybee]

Rebuilding a water pump is not hard. The bearings and seals are usually standard parts that a bearing shop can get you if bring them the the old ones. You will need a press. Harbor Freight has one for under $200 if you might need one again. Or have a machine shop do the work for probably $50. If the shaft is worn or the impellor is rusted then you will need a machine shop to repair them, but often that isn't the case.
A good automotive machine shop should be very comfortable with the work, as pumps are not available for automotive antique engines they often rebuild and restore.
There is a heat exchanger. The camshaft driven pump on the front of the engine in your picture pumps raw seawater through the exchanger. The main engine pump you have apart in the other pictures pumps coolant through the engine.
How far are you from the yard to haul out? What is the history of the engine? From the looks of it, you have more work than just the waterpump.

 

[blue by u]

Rebuilding a water pump is not hard. The bearings and seals are usually standard parts that a bearing shop can get you if bring them the the old ones. You will need a press. Harbor Freight has one for under $200 if you might need one again. Or have a machine shop do the work for probably $50. If the shaft is worn or the impellor is rusted then you will need a machine shop to repair them, but often that isn't the case.
A good automotive machine shop should be very comfortable with the work, as pumps are not available for automotive antique engines they often rebuild and restore.
There is a heat exchanger. The camshaft driven pump on the front of the engine in your picture pumps raw seawater through the exchanger. The main engine pump you have apart in the other pictures pumps coolant through the engine.
How far are you from the yard to haul out? What is the history of the engine? From the looks of it, you have more work than just the waterpump.

Yes I would say there is a bit of over haul to do to the motor but it did run well and proper temp s untill the coolent pump sezed ie I’d say bearing , but the motor soposidly was done 500 hours ago but 3 years ago. , the only yard I could find is 100nm away from we’re I’m at And thank you for all the advice

 

[blue by u]

Rebuilding a water pump is not hard. The bearings and seals are usually standard parts that a bearing shop can get you if bring them the the old ones. You will need a press. Harbor Freight has one for under $200 if you might need one again. Or have a machine shop do the work for probably $50. If the shaft is worn or the impellor is rusted then you will need a machine shop to repair them, but often that isn't the case.
A good automotive machine shop should be very comfortable with the work, as pumps are not available for automotive antique engines they often rebuild and restore.
There is a heat exchanger. The camshaft driven pump on the front of the engine in your picture pumps raw seawater through the exchanger. The main engine pump you have apart in the other pictures pumps coolant through the engine.
How far are you from the yard to haul out? What is the history of the engine? From the looks of it, you have more work than just the waterpump.

But as well the wind seems to be in my favor for next two days so I’m going to see how close I can sail to the dry dock and go from there on a rebuild

 

[DGA]

The carbon face seal and cartridge shaft bearing in most water pumps is a specialty item usually, not sure any bearing shop would stock them, but I can't say I have tried through those sources lately. BUT, my best guess is that all similar Yanmar engines have the SAME seal and cartridge bearing. You could buy a similar three cylinder pump and press the guts out and could have simple success rebuilding your housing.

 

[fergus]

I have the same engine/pump and rebuilt the pump. There are no replacement pumps available anywhere as far as I could find. There also doesn’t seem to be a non-marine version of this exact pump.

To rebuild I replaced the shaft/bearing assembly and the “mechanical seal” which are both still available. Save the old impeller and be careful not to break it during removal as these are no longer available. Getting the pulley flange off the shaft was a total pita and in the end I needed a torch and a comically oversized gear puller.

Looking in my notes I believe I ordered P/Ns:
124250-42240, description : SHAFT, IMPELLER
124250-42350, description : SEAL, MECHANICAL

 

[BJoslin]

As Fergus said be very careful with removing the impeller! I had the same problem. Was able to get new seals, gaskets, even the shaft. My impeller broke during removal. After many disappointing hours of searching was not able to find a replacement. Finally threw in the towel and removed the old Yanmar.
After I had already removed the engine and went another route, someone did point me to a pump repair shop out of Oregon. I’ll try to find the name and add here. I never did call as I had already committed to replacing the Yanmar but it might be worth a shot.

 

[BJoslin]

As Fergus said be very careful with removing the impeller! I had the same problem. Was able to get new seals, gaskets, even the shaft. My impeller broke during removal. After many disappointing hours of searching was not able to find a replacement. Finally threw in the towel and removed the old Yanmar.
After I had already removed the engine and went another route, someone did point me to a pump repair shop out of Oregon. I’ll try to find the name and add here. I never did call as I had already committed to replacing the Yanmar but it might be worth a shot.

Flying Dutchman is the place that was recommended to me. Here is the website. http://waterpumps.bizhosting.com/