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coggonobrien 
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Joined: 14 Nov 2010
Location: Eastern Iowa
Points: 1807
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 Topic: 616 vs 620/720 engine
Posted: 10 Nov 2014 at 9:01am |
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What is differant? Just carb? Manifold the same?
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den/southern illinoi
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Joined: 11 Sep 2009
Location: Sparta, Illinoi
Points: 1938
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Posted: 10 Nov 2014 at 1:07pm |
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I only had a 616 for a short time when I bought a 720 and 616 from the same guy. Sold the 616 to finance fixing up the 720. These are what I remember as differences between the 616 to the 620/720.
The carb is differenct as you said. The air cleaner is different. Of course the horsepower is different. I'm guessing that there may be more differences (besides decals and what I mentioned) but I do not know any other than what I listed.
Den
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Own 5 720 garden tractors with associated equipment,1 620 garden tractor, 4 wheel 20
2-5015, 5020 and associated equipment and 2 electric forklifts.
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coggonobrien
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Location: Eastern Iowa
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Posted: 10 Nov 2014 at 3:02pm |
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is the air cleaner different simply due to the different carb size?
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coggonobrien
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Posted: 10 Nov 2014 at 3:05pm |
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good somebody post an up close of the air cleaner on the cckb and also the carb without the cleaner?
Thanks!
David
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AcFordHawk
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Location: Boone, IA
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Posted: 10 Nov 2014 at 5:42pm |
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IB (restoring), MF GC1705, MF 2705E
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coggonobrien
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Posted: 10 Nov 2014 at 6:02pm |
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Good deal looks like all cckb Manifold are the same
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Tracy Martin TN
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Joined: 11 Sep 2009
Location: Gallatin,TN
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Posted: 10 Nov 2014 at 8:02pm |
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The CCKA carb mounts to top of manifold. The CCKB mounts to side of manifold. HTH Tracy
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No greater gift than healthy grandkids!
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BrianC
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Joined: 16 Jun 2011
Location: New York
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Posted: 10 Nov 2014 at 9:45pm |
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On the 620/720, what is the cylindrical black part between the
manifold, carb and air cleaner. Maybe a crankcase scavenger gizmo?
Then look at the complex 90 degree formed hose connecting the air cleaner and intake side of the carb. Can that be purchased new?
And last, is the air cleaner a little on the small side?
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Tracy Martin TN
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Posted: 10 Nov 2014 at 9:51pm |
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Yes and yes. Hold onto your billfold! Tracy
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No greater gift than healthy grandkids!
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coggonobrien
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Location: Eastern Iowa
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Posted: 11 Nov 2014 at 4:48am |
here is my nos engine  
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coggonobrien
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Location: Eastern Iowa
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Posted: 11 Nov 2014 at 4:49am |
here's my part's engine for things like the flywheel and oil pan and ignition 
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Dan(NE)
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Joined: 18 Aug 2010
Location: Central City NE
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Posted: 28 Feb 2015 at 1:40am |
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I need the RH engine cover for my AC 720 with the Onan 19.5 HP CCBK engine. Please e-mail me.
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coggonobrien
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Location: Eastern Iowa
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Posted: 01 Mar 2015 at 3:44pm |
talking this cover Dan? you didn't give me an email 
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Dan(NE)
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Location: Central City NE
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Posted: 01 Mar 2015 at 6:48pm |
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I think that is the cover I need. I will send you a photo of my engine in a couple of days. Please e-mail me the price and your e-mail address and phone number to dan.monaghan@yahoo.com
My engine number is Onan CCKB-MS / 2733J 12V Serial No. 0874746485
Thanks.
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Steve in NJ
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Posted: 02 Mar 2015 at 8:33am |
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Some of the wiring is a little different also. Routed and color coded differently on some circuitry between the 616 and 620/720. Wiring and color coding the same on the 620/720. Seems like the 616 is the morphidite of the three.
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39'RC, 43'WC, 48'B, 49'G, 50'WF, 65 Big 10, 67'B-110, 75'716H, 2-620's, & a Motorhead wife
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HudCo
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Posted: 02 Mar 2015 at 2:19pm |
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my boss [the wife] said i could order parts main and rod brgs. for my ccka in the 616 but what makes the rated horse power diff between the ccka cckb i know i asked once before its not just the carb intake aand heaveyer flywheel?
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Tracy Martin TN
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Posted: 02 Mar 2015 at 8:03pm |
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I think the RPM's were increased also. Tracy
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No greater gift than healthy grandkids!
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HudCo
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Posted: 05 Mar 2015 at 2:32pm |
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the gizmo isjust a crankcase breather probley the easest piece to find used
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