MTU 4000 Sea Water Pump

Both Scarano Marine and RPM diesel in Fort Lauderdale can service the 4000 series raw water pump.

Please do some searches on this forum. MTU pump service has been brought up before.

I know that the 4000 series have had a couple of different manufacturers of the raw water pumps since it was introduced and figured RPM or Scarano would offer a remanufactured pump at a discount from the $13,000-dollar new units if they couldnt service it for you. I do remember some discussion on YF the Capt Ralph was referring to about no rebuild kits available for the Burke 4000 series pumps and that MTU authorized service was basically forcing new raw water pumps on customers. Give MTU France a call in Cannes and see what they have to say about the availability of rebuild kits for your pump. BTW, what raw water pump manufacturer is on your 4000 series?

The larger MTU pumps are not what we are used to. Not a rubber impeller but a ridged stainless one pressed on to the shaft.
Custom made for MTU.
The bearings are pressed also. Somewhere buried back there is the shaft seal. No telling if that seal is available at all.
Big asp pump but not a lot of room for extraction or assembly tools.
Weigh over 90lbs. Cost over $6K when you can find one.

Found the 6 year old YF thread.
No joy then either.
https://www.yachtforums.com/threads/mtu-raw-water-pumps.26120

I'm afraid when the dust settles, another $8K is going to get spent before this project get back on the water.
Stay out of the silt is the only advice I can offer for the future.

Re-mans for the 2000 series go for $8,000 nowadays so no way in hades will you find a 4000 series raw water pump anywhere near that price ($8,000) save for a fresh off the back of the truck on Ebay or maybe when a disgruntled engineer & Captain raids the spares bin and sells online like Ivanna Trumps Russian engineer & Capt. did aboard her Baja in 2004 after going 6 months without pay as they had a field day selling all the spares aboard online. (They got caught BTW). Last vessel that I was on had 16v4000 m73L series installed and we kept a complete freshwater pump and a raw water pump in spares, and I recall the invoice for the raw water pump being $13-14,000 in 2017 dollars and the freshwater pump was close to $20,000. I don't know what the OP has aboard be it 8v, 12, 16 or 20 v 4000 series but for the 12v4000 and up your looking @ $13,000 + for a raw water pump.