Allis B carb issue

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   Ok so its not really a issue now that I figured out how to to start it but its not quite right. The tractor is a 39 B. I recently rebuilt the engine and the she runs and idles great. The problem is when the engine is cold it can be tricky to start. She will always "pop" on the third pull but will seldom start . When the tractor fires (but doesn't start) the carb floods and I have to pull the throttle all the way back (too completely close the butterfly) and crank it 3 times. On the third crank she will "pop" again and then I move the throttle up to the first notch and it will then start on the first crank. After that it will hot start on the second (sometimes first) pull with no issues. I Have checked to float level, valve clearance and have also checked the air cleaner housing for restriction. All three checked out fine. Anyone have a thought on what the problem may be?
Also my initial start settings are no choke and the throttle set at the first notch.

	This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
	The Forum	Parts and Services	Unofficial Allis Store	Tractor Shows	Serial Numbers	History

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
chllngr528 Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 02 Feb 2011 Points: 396	Post Options Post Reply Quote chllngr528 Report Post Thanks(0) Quote Reply Topic: Allis B carb issue Posted: 12 Jun 2012 at 3:21pm
	Ok so its not really a issue now that I figured out how to to start it but its not quite right. The tractor is a 39 B. I recently rebuilt the engine and the she runs and idles great. The problem is when the engine is cold it can be tricky to start. She will always "pop" on the third pull but will seldom start . When the tractor fires (but doesn't start) the carb floods and I have to pull the throttle all the way back (too completely close the butterfly) and crank it 3 times. On the third crank she will "pop" again and then I move the throttle up to the first notch and it will then start on the first crank. After that it will hot start on the second (sometimes first) pull with no issues. I Have checked to float level, valve clearance and have also checked the air cleaner housing for restriction. All three checked out fine. Anyone have a thought on what the problem may be? Also my initial start settings are no choke and the throttle set at the first notch.

Sponsored Links

Reindeer Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 14 Sep 2009 Location: Calgary, AB Points: 650	Post Options Post Reply Quote Reindeer Report Post Thanks(0) Quote Reply Posted: 12 Jun 2012 at 3:26pm
	My 170 will do this, (not on a crank thank heavens) but for a cold start I use 1/2 inch of choke, and it usually starts perfectly. I was worried about flooding as it seemed to do that easily, but if I get the choke right, and adjust it fairly quickly for smooth running, things are good!