Ignition static timing. Must be set to spec or the engine will run poorly. (See manual - I think it's TDC but I'm not positive) .
Vacuum advance. The distributor diaphragm chamber must be connected to the manifold vacuum port with a small (1/8"?) hard line. And the vacuum mechanism must work freely and not leak.
Centrifugal advance. It must not be stuck.
Breaker point gap. Set to 0.020. If the gap's too small or the points are worn it will cause misfiring.
Carb mixture. Fire out of the exhaust can mean a lean mixture. Try turning the power screw out a turn or two and see if this helps.
Carb accelerator pump. The stock Marvel USX carburetor is notorious for accel pump diaphragm problems. A failed diaphragm will give a temporary lean condition on acceleration. And for reasons I don't understand a new diaphragm is not ordinarily included with rebuild kits.
The 1850 gasser is a generally solid, trouble-free tractor. It's only real downside is it's thirst for gasoline!
Same-Day Shipping! Most of our stocked parts ship the same day you order (M-F). Expedited shipping available, just call! Most prices for parts and manuals are below our competitors. Compare our super low shipping rates! We have the parts you need to repair your tractor. We are a Company you can trust and have generous return policies! Shop Online Today or call our friendly sales staff toll free (800) 853-2651. [ More Info ]
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.
About this site - Yesterday's Tractors is your one-stop source for antique tractors. If you are interested in older tractors you've come to the right place! Join more than 275,000 other classic tractor enthusiasts from all over the globe. We have many resources for antique tractor enthusiasts available including photos, classified ads, more than 24 tractor discussion forums, a show guide, values, specs and much more. Bookmark this site and come back often. Thanks for stopping by! Feel free to use our feedback form to send us your comments, suggestions and ideas.