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125,138,149,160 CID gov. springs?
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Kip-Utah View Drop Down
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Joined: 14 Sep 2009
Location: Southern Utah
Points: 918 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Kip-Utah Quote  Post ReplyReply Direct Link To This Post Topic: 125,138,149,160 CID gov. springs?
    Posted: 28 Jun 2012 at 12:58pm

 B/C tractors are rated at 1500 rpms, by merely changing the external governor spring the CA goes to 1650 RPMs. This 1650 RPM rating is consistent on all the small D-series tractors with 138 & 149 engines up through the D14. OK so far, do these small D-series engines use the same spring as the CA? The early D-15s with the same 149 engine as the D-14 now is rated at 2000 RPMs; Is this just a different spring on the D-15 than the one on the D-14, or are their other changes? Of course the later 160 cid D-15s also turn 2000 RPMs; Do the 149 and 160 D-15s use the same governor spring? Bottom line...How do I get 1800-2000 RPMs out of my C's 125 cubic inch engine? Kip  



Edited by Kip-Utah - 28 Jun 2012 at 1:04pm
HANSEN'S OLD ORANGE IRON. Showing, Pulling, & Going!!
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Ricky D View Drop Down
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Joined: 13 Sep 2009
Location: Waterloo ON Can
Points: 57 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ricky D Quote  Post ReplyReply Direct Link To This Post Posted: 28 Jun 2012 at 7:16pm
I have put the D15 spring on CA, ,D12, D14. Need to be careful on the CA & possibly D10-D12 as I don't think they have a drilled crank ???? I only rand them wide open under light load or on road. Had a mark on throttle quadrant for correct speed after running/checking on dyno.
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Chalmersbob View Drop Down
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Joined: 11 Sep 2009
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Points: 2122 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Chalmersbob Quote  Post ReplyReply Direct Link To This Post Posted: 28 Jun 2012 at 9:43pm
Find the springs that were used on 125 power units and you'll get 1900 RPM.
Drilled crank or not, the power unit on a combine ran at 1900 + RPM all day long.
I have a power unit on a CA, WOW does it move. Bob
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Points: 22149 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jun 2012 at 6:42am
D-15 spring/plunger will get you 2200 rpm high idle, no load.
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Kip-Utah View Drop Down
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Points: 918 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Kip-Utah Quote  Post ReplyReply Direct Link To This Post Posted: 29 Jun 2012 at 9:06am
Thanks guys!!
HANSEN'S OLD ORANGE IRON. Showing, Pulling, & Going!!
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