(800) 853-2651
SHOP NOW

super c rebuild

J

Jonathan Mirgon

Member
Still waiting on some parts to complete my super c engine rebuild, The question is engine rpm ? I will have to reset the governer linkage etc after the rebuild, My book indicates a top engine no load of 1,850 rpms. How do you guys determine the engine rpms without a factory tach ?
 
Having a battery ignition, you can use a tach like the old dwell-tachs that hook onto the terminal of your coil that runs to the points in your distributor. I got mine years ago and guard it closely, but they're still available. Not all of the newer ones let you choose 4-cyl, so it's sometimes necessary to take a reading on 8-cyl and double it.

I also use a laser tach. If you're starting out clean, you can get a patch of the reflective tape to stick onto your crank pulley.

On greasier motors, I've put a patch of the tape on the PTO shaft and adjust until high no-load idle turns the PTO at just under 600 RPM.

Just a note, all my books for the SuperC, and the Ser # show high no-load idle as 1815, which is 110% of the rated working (loaded) RPM of 1650.

I don't think you're gonna unglue your motor job by turning it up to 1850. I mention it just in relation to using the PTO shaft for a laser tach. 110% of 540 is 594, so that's my target. 1850 is more like 112% and works out to about 605 on the PTO. Your motor speed will fluctuate enough that 600 is not a bad compromise for either target.
 
It's not important unless you are out plowing all day or something. Unlikely that you will overrev it if you hook the linkage up so that you get full range throttle movement without binding. To adjust the rpm, far as I know, you go inside the governor. In other words, just adjust the linkage so that it works right.
 
Did you rebuild the governor too? Do you have the instructions for synchronizing the governor linkage to the carb? Setting the top end is done with the screw on the top of the gov. casting but the linkage has to be set up correctly first. RPM's can be read with any cheap automtive tach/dwell meter.
 
You must log in or register to reply here.

Similar threads

M
54 super c how to adjust govner
Replies
10
Views
758
Janicholson
Janicholson
J
IH Super C engine help
Replies
15
Views
678
jaburford
J
I
Farmall c with 404 engine issues
Replies
7
Views
394
wore out
wore out
S
Farmall Super C main seals
Replies
4
Views
732
gene bender
G
D
Super C Hydraulic Cylinder Stop Info
Replies
13
Views
686
wore out
wore out
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top