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Old 04-03-2016, 12:35 AM   #101
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BOOOOOIIIIING!!!! She's beautiful!!!!!
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Old 04-03-2016, 12:38 AM   #102
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Originally Posted by healhustler View Post
Great job. Should make a nice re-power if you don't mind a set of Commi-pinko drive gears keeping everything going down the pike.
OK, I'll bite. You are talking about the West German drive gears? In my mind, German steel and machining in the day was highly revered. The MB's, BMW's, Porsche's and so on came out of there. I don't think they were transported though Check Point Charlie. If there is anything to worry about, it is the original Sherwood raw water pump. I have read about their failures, but I'm not sure this pump is problematic like the ones on later, higher HP models.
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Old 04-03-2016, 12:43 AM   #103
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I have read about their failures, but I'm not sure this pump is problematic like the ones on later, higher HP models.
It probably is. I would go ahead and do all the updates on that engine while it is still on a pallet. That pump can be a bitch to get to in certain installations!!!
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Old 04-03-2016, 12:47 AM   #104
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If you have an M71 Sherwood pump, it will do well for 700 hrs or so before needing seals or a rebuild. Fairly easy with a press. I carry a complete unit aboard to swap if needed.

This pump model is much better than the ones for the higher rated hp 6b models
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Old 04-03-2016, 02:48 AM   #105
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the drive gears showed they were made in West Germany.
"West Germany"......the good guys.
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Old 04-03-2016, 04:52 AM   #106
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Great job. Should make a nice re-power if you don't mind a set of Commi-pinko drive gears keeping everything going down the pike.
Um, wasn`t East Germany the "commi/pinko" side, and West Germany( the gears indicated origin) the "democratic and free" side.
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Old 04-03-2016, 12:07 PM   #107
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It probably is. I would go ahead and do all the updates on that engine while it is still on a pallet. That pump can be a bitch to get to in certain installations!!!
Thanks Baker. The family and I were just down there in your backyard for Spring Break. Took in the Southwest International Boat Show, Houston Space Center....... Great area!


"bshanafelt If you have an M71 Sherwood pump, it will do well for 700 hrs or so before needing seals or a rebuild. Fairly easy with a press. I carry a complete unit aboard to swap if needed"

bshanafelt; That's what I was thinking. This is a M71 pump. One of the reasons for swapping engines is to get the boat ready for a cruise from SF Bay to Alaska next year. I don't have a spare pump, so I need get one. People on Boat Diesel recommend the Tony Athens/Seaboard Marine replacement. I will be installing a low water flow sensor to make sure I don't cook the engine.
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Old 04-03-2016, 12:19 PM   #108
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I don't think Seaboard made a replacement for the M71 as it is not the troubled one like I have, the P1700 series. Just rebuild your existing pump and get a new one for a spare.

Get a temp alarm switch on three places: Exh manifold, cyl head, exhaust mixer. That covers you on the cooling system.
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Old 04-03-2016, 06:37 PM   #109
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I don't think Seaboard made a replacement for the M71 as it is not the troubled one like I have, the P1700 series. Just rebuild your existing pump and get a new one for a spare.
Hi Ski. I noticed Seaboard is still selling the M71 Sherwood pumps. So you are probably right that Tony didn't design a replacement for that pump. I will just buy another one to keep on board and rebuild them as needed.
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Old 04-03-2016, 07:02 PM   #110
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Great job. Should make a nice re-power if you don't mind a set of Commi-pinko drive gears keeping everything going down the pike.

I think you need to brush up on your Cold War geography.
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Old 04-03-2016, 07:05 PM   #111
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Um, wasn`t East Germany the "commi/pinko" side, and West Germany( the gears indicated origin) the "democratic and free" side.
Of course it is, Bruce. You'd think I wouldn't have made such a mistake, having lived in both places, for God's sake!
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Old 04-03-2016, 07:13 PM   #112
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I think you need to brush up on your Cold War geography.
Must be the Dyslexia, Bill. well, maybe a little age.
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Old 04-03-2016, 11:25 PM   #113
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" M71 Sherwood pump, it will do well for 700 hrs or so before needing seals or a rebuild."


only 700 hrs, then a boat unit to swap in a new pump! Got to be better than that. It was just yesterday that I got my boat, now I have more than 3000 extra hours on it. that means I would have had to replace my pump 4 times and would be watching the newest one carefully. Good thing I have the OEM stuff on my Volvos and not those short life suckers!
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Old 04-04-2016, 12:50 AM   #114
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I've posted my experience with the M71 pump in other threads, but here it is again:

Just replaced after 3815 hours, new impellers every 750 hours, cam/backing plate at 1500 hours. I did not rebuild this unit as the shaft needed a new seal, and the housing was worn. But it still had some hours left in it.

My first pump went 3250 hours and was rebuilt for a drop-in spare.
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Old 04-04-2016, 01:00 AM   #115
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Quote:
Originally Posted by bshanafelt View Post
If you have an M71 Sherwood pump, it will do well for 700 hrs or so before needing seals or a rebuild. Fairly easy with a press. I carry a complete unit aboard to swap if needed.

This pump model is much better than the ones for the higher rated hp 6b models
That is a pretty short life. My Jabscos are at 2000 hours with only routine impeller changes.

I'm with Baker, consider an upgrade to SBar Marine.
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Old 04-04-2016, 11:30 AM   #116
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These pumps, regardless of brand, tend to live long if they are run often. When sitting, seals bind up and other things corrode, that's what shortens their life.

I got about 2500hrs and about 12yrs out of the original Sherwood P1730, but boat ran at least once a week. Tony Athens called me out as BS'ing, but it was true!!!

The ones that sit are the ones that are trouble. Except Jabsco's on Detroits. They knew how to make a pump!!
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Old 04-05-2016, 10:10 PM   #117
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You want to get on Tony web site. It is loaded with great info. Well worth your time.
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Old 04-05-2016, 10:15 PM   #118
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Good Goen!!!
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Old 04-06-2016, 12:07 AM   #119
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Quote:
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I got about 2500hrs and about 12yrs out of the original Sherwood P1730, but boat ran at least once a week. Tony Athens called me out as BS'ing, but it was true
Yeah, I know what you mean. He does have some good articles for Cummins on the Seaboard Marine website.
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Old 04-06-2016, 12:35 AM   #120
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Hi,
Donsan, you should have no trouble getting Perkins parts anywhere in the world for any of their engines. try parts4engines.com as they are OE suppliers for Perkins.
Remwines, did you by any chance 'race balance' the Cummins, I've done a couple and it makes a great job in a marine engine.
Well done, the engine looks really sweet.
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