Jump to content

Unofficial Home of Old Simplicity & Allis-Chalmers Garden Tractors

Sign in to follow this  
cojo92

627 Back-firing...carb problem??

Recommended Posts

cojo92
I just got a Yeoman 627 on ebay friday night and it has a little backfiring to it. Mark told me to turn the thing on the carb and it worked ut it was loud as hell!!! so i put it back to the way it was and now it sounds all [img]/club2//attach/UCD/censored.gif[/img]tyy... CAN ANYONE HELP ME!??!?!???? THANKS! :D PS. Mark put a post for me asking how to add headlights without the battery to my yeoman...Please check it out. Mike

Share this post


Link to post
Share on other sites
2burning
Well, if it was a choice between running well but really loud, or running bad and sounding quieter but bad, I would choose running well but loud :> So maybe if you can tell us a little more, someone may be able to help. So what state is it in now, does it backfire when idling, or pulling a load, or when it is hot, or when it is cold, or when you open the throttle, or when you shut it down while it is hot, which screw on the carb did Mark have you turn, in or out, etc.?

Share this post


Link to post
Share on other sites
D-17_Dave
There isn't anything on the carb. that would make the engine sound louder except for the throttle. Of course if you increase the throttle ot will be louder. As for the backfiring, if it's too lean it will backfire but should do so mostly when you throttle down. If it's much more lean than this it won't run right and you should see this in poor acceleration and other loading problems. If the backfiring is somewhat constant then I'd look at other things such as a bad plug or some other ignition issue. The other possibilities could be heavy carbon buildup inside the combustion chamber or if the engine has sat for a long time a sticking vavle. I have also seen a loose exhaust valve seat cause this but that would be worst case. Mike, you might also try to use a few different words to describe what the syptoms are.

Share this post


Link to post
Share on other sites
cojo92
Ok Thanks Guys...yeah i feel realy stupied now cuz ihad relized i was playing with the throttle.lol. well i cant realy explain wat it is doing but...i have a video on Youtube. here's the link: [url]http://www.youtube.com/watch?v=rauFsxhq2A8[/url] I will try to explain it tommorow or saturday. THANKS EVERYONE!

Share this post


Link to post
Share on other sites
cojo92
LOL...Not yet but hopefully this weekend with my dad.
quote:
Originally posted by joshuaareed
Wow you need a helmet cam, I was getting dizzy after about a minute and a half. LOL!!! looking good Mike, did you get the battery for the headlights yet?

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.
Sign in to follow this  

  • Who's Online (See full list)

    • jklw77
    • tripleguy
    • Alltractoredup
    • RickS
  • Today's Birthdays

    No users celebrating today
  • Recent Status Updates

    • Paul M.Murphy

      Paul M.Murphy

      Hello glad I got on this site. I hope to upload a couple of photos of my Simplicity Broadmoor 
      Model 707 Tractor. I have replaced all the belts on it and installed a new ignition switch.
      Have a mower deck which was in poor shape , repaced a couple of bushings and welded the
      deck where there was some holes. The tractor and mower deck came from a friend and the 
      mower deck metal was getting pretty thin. Some new metal was put in it and we also undercoated the underside of the deck. This was done by my friend Greg Toulman.
      I have not put the mower deck on the tractor yet, waiting for Greg to come home and give me a hand. Can you please tell me if there is a manual for the mower deck and where I could get one.
      I would also like to get some moon wheel discs as well.
      I will try and down load some photos of the tractor when my wife shows me how to. 
      I really love driving this tractor and also how well it is made compare today's tractors, especially the flexible rear end and the rollers.
      Tell the next time 
      Paul
       
      · 8 replies
    • jbrooks

      jbrooks  »  Talntedmrgreen

      Josh
       
      folowing  this from a link at the downloads.  I just rescued an AC 920 with the lambodini diesel. I can' t download  yet .  Where did you find the PDF copy you posted. . I would like to figure out how to adjust the injection pump. 
      I assume it's a bosche, correct
      · 0 replies
  • Adverts

×