Posted by Tom Fleming on December 31, 2010 at 12:00:31 from (67.20.243.240):
In Reply to: cub won't start posted by jeep 258goat on December 30, 2010 at 16:03:12:
ok, let's make a short laundry list here. First, Jeep said he rebuilt this thing, so my assumption is that the crank was out, the cam was out, distributor was out, etc. so, let's start here:
1.) check compression. all cylinders should register close to the same pressure. If the CAM is timed right, and the valve lash is right, then there should be decent compression. No compression, then there is a valve issue (timing or lash).
2.)Check spark at TDC on number 1 and timing order (wiring). If the rotor is not at 1:00 when #1 is at TDC, then there is a timing issue with either the distributor/Mag gear or the distributor itself. Also, are the wires on in correct order 1,3,4,2 starting at 1:00 on the cap, and going clockwise.
3.) vacuum. If the valves are timed right, and there is compression, then is the manifold leaking or anything else in the fuel supply path (carb, manifold).
4.)Fuel delivery. fuel may be going to the carb, but is the carb delivering fuel. Best way to check very quickly is with the air cleaner hose off, and a helper running the starter, spray some ether into the intake on the carb while cranking. if it fires then dies, you have a fuel delivery problem in the carb. BTW, this test should be done AFTER determining that the timing and firing order are correct. you really don't want to be spraying ether into an engine that may backfire.
If you go through all these steps, and she still won't run, then I am stumped. (that is based upon the fact that you state you have good spark at the plugs.)
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. [ About Us ]
Today's Featured Article - Women and Tractors - Tractor Engine Repair - by Teri Burkholder. One of the great things about working on a tractor engine with your other half is that you know what he is thinking of at all times and can anticipate his every move and his next thought of what he will do. With Ben, anyway, I can tell! He'll be busy working and I’m handing him tools and he says, "give me that..." and I’ve already got it in his hand or "hand me that....."and I’ve got the portable light right where he needed it placed to see. "Run in the house and get me a...."as I open th
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
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.
