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AC 21000 Mk2 parts
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JayYoung View Drop Down
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Joined: 15 Mar 2022
Location: Atlanta
Points: 2 		Post Options Post Options   Thanks (0) Thanks(0)   Quote JayYoung Quote  Post ReplyReply Direct Link To This Post Topic: AC 21000 Mk2 parts
    Posted: 15 Mar 2022 at 10:13am
About to buy a boat with what is, as best I can tell, an AC 21000 MK2.

I've exhausted my knowledge and ability to internet search, hoping others here can help with a few questions. This will be my first diesel, but I'm not a stranger to mechanical, engines, or hard work.

Are fuel, oil filters still available, or would it be smarter to install some modern bypass/ housing to accept available filters?

I have no idea if it was ever rebuilt, what is the average life of one of these? Hopefully, after some cleaning and maintenance, I can get a few more thousand hours.

Any concerns or thoughts I should look into? The engine does currently run, but apparently is hard starting? I have not examined in person yet.



Thanks!
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DiyDave View Drop Down
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Joined: 11 Sep 2009
Location: Gambrills, MD
Points: 51737 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DiyDave Quote  Post ReplyReply Direct Link To This Post Posted: 15 Mar 2022 at 5:56pm
Swinford's book says this motor was used in HD21 tracked tractors. If you use that as your reference, you may find parts.  That must be a helluva boat, just to haul that beast of a motor!Wink
Source: Babylon Bee. Sponsored by BRAWNDO, its got what you need!
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DougG View Drop Down
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Joined: 20 Sep 2009
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Points: 8113 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DougG Quote  Post ReplyReply Direct Link To This Post Posted: 15 Mar 2022 at 6:21pm
Pretty sure all is available on Ebay - would luv to see some pictures
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wjohn View Drop Down
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Joined: 19 Jan 2010
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Points: 1998 		Post Options Post Options   Thanks (0) Thanks(0)   Quote wjohn Quote  Post ReplyReply Direct Link To This Post Posted: 15 Mar 2022 at 8:29pm
Yeah, if you buy it, we want pictures. This is the first I've heard of an AC engine used in a marine application... That would be neat.
1939 B, 1940 B, 1941 WC, 1951 WD, 1952 CA, 1956 WD-45
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Mikez View Drop Down
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Joined: 16 Jan 2013
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Points: 8405 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mikez Quote  Post ReplyReply Direct Link To This Post Posted: 15 Mar 2022 at 8:42pm
welcome to the forum. Yes we would like to see pictures. Sounds interesting
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AC7060IL View Drop Down
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Joined: 19 Aug 2012
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Points: 3343 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AC7060IL Quote  Post ReplyReply Direct Link To This Post Posted: 15 Mar 2022 at 9:23pm
JayYoung, welcome to the AC forum. Congrats on owning an AC diesel. The 21000 MKII is a big ole' boy. Weighs in as a base engine @ 3520lbs. It is designated as 6138T(6 cylinder, 13.8L Turboed) & it is in the late1960s-1970s 844 cu in engine family (5.25"bore x 6.5" stroke) which includes the following models:
16000, 16000T, 16000H all naturally aspirated,
17000 lightly turboed,
21000 turboed,
25000 turboed intercooled.
Depending on it's application, the 21000's hp can vary ~ usually 3 different settings 340-375hpGross@2100rpms(full load). Full load is recommended in Variable loads. Don't exceed 2 hours at full load rpms without including variable lower adjusted rpm loads.
A 24 hr fully loaded engine is recommended max @ 1800 280hpGross/265hpNet.
At 340hpGross, torque is 984ft/lbs@1400 rpms, .345lbs fuel consumed BHP@1650rpms,
At 360hpGross, torque is 1042ft/lbs@1400 rpms, .345lbs fuel consumed BHP@1650rpms,
At 375hpGross, torque is 1050ft/lbs@1400 rpms, .349lbs fuel consumed BHP@1650rpms,
Compare it's Allis-Chalmers (AGCO) filter's part numbers to other online filters (Napa, Balwin, etc) and you should be able to find all of them.
Longevity? Read/study its Owners Manual per it's application's LOAD(S), duration of LOADS, RPMs recommendations per LOADS, AND SERVICE INTERVALS. Try not to allow it "low idle" for lengthy intervals. If lengthy low idle is required, try to set at 900 rpms to ensure that it's crank/rod journals stay fully lubed.

In the boat this AC 21000 is installed, is it a small tugboat, river ferry boat, or modest fishing boat?




Edited by AC7060IL - 15 Mar 2022 at 10:10pm
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CAL(KS) View Drop Down
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Joined: 18 Sep 2009
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Points: 3786 		Post Options Post Options   Thanks (0) Thanks(0)   Quote CAL(KS) Quote  Post ReplyReply Direct Link To This Post Posted: 16 Mar 2022 at 7:27am
filters are readily available will not be a problem  i get from carquest for my 16000 engine cartrige style i believe is 85311 off top of my head
Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20

Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15
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Calvin Schmidt View Drop Down
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Joined: 11 Sep 2009
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Points: 4525 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Calvin Schmidt Quote  Post ReplyReply Direct Link To This Post Posted: 19 Mar 2022 at 12:38pm
Parts are available from Minnpar 
Nothing is impossible if it is properly financed
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