D21 fuel smoking

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

   So dads d21 we’ve been working over last few years and finally got it out and running it some,But it is smoking some. Heavier under more throttle. Not oil smoke though. Smells like fuel maybe. Could it be timing off a little. We bought this tractor “with motor built already”. Had a time ever getting it to crank first time until we figure out it was 180 on timing marks. So it’s hard to use timing marks.  
Also it will pop a little  out of exhaust some times if you rev it up quickly. 
Also we had injection pump built by a local shop. Could it just be timing still a little off causing the fuel smoke?

Edited by ACman75 - 2 hours 38 minutes ago at 9:51pm

	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
ACman75 Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 20 Aug 2015 Location: Florence AL Points: 176	Post Options Post Reply Quote ACman75 Report Post Thanks(0) Quote Reply Topic: D21 fuel smoking Posted: 2 hours 39 minutes ago at 9:50pm
	So dads d21 we’ve been working over last few years and finally got it out and running it some,But it is smoking some. Heavier under more throttle. Not oil smoke though. Smells like fuel maybe. Could it be timing off a little. We bought this tractor “with motor built already”. Had a time ever getting it to crank first time until we figure out it was 180 on timing marks. So it’s hard to use timing marks. Also it will pop a little out of exhaust some times if you rev it up quickly. Also we had injection pump built by a local shop. Could it just be timing still a little off causing the fuel smoke? Edited by ACman75 - 2 hours 38 minutes ago at 9:51pm

Sponsored Links

DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 20260	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 2 hours 33 minutes ago at 9:56pm
	D-21 engine injection pump (if that's what it is) shall be timed at 34 degrees BTDC. What are you timed at ?? If you think a D-21 is smoke free out the exhaust pipe, they are NOT. Valve lash needs to be adjusted to .017" COLD on intake and exhaust valves. Edited by DrAllis - 2 hours 20 minutes ago at 10:09pm