The Jack's Small Engines Forum - Join Our Online Community
Reply to post

Black smoke

Author
antson
New Member
  • Total Posts : 2
  • Scores: 0
  • Reward points: 0
  • Joined: 2018/09/15 19:27:08
  • Status: offline
2018/09/15 19:36:00 (permalink)
0

Black smoke

I have a 21hp briggs engine model 441577-0113-E1. On initial startup for a few seconds it runs fine and in short order it starts running really rich with black smoke coming out out of the exhaust. It does the same thing with a new fuel filter and with the air cleaner off. Took the carb apart and it was spotless. The anti-backfire solenoid works fine too. It started doing this out of the blue. Any clue?
 
THanks Tony

3 Replies Related Threads

    AVB
    Super Member
    • Total Posts : 595
    • Scores: 24
    • Reward points: 0
    • Joined: 2017/06/21 16:35:48
    • Location: Elora, TN
    • Status: offline
    Re: Black smoke 2018/09/15 20:03:12 (permalink)
    0
    Probably the fuel bowl gasket and o-ring bad. And these should be replaced especially since you had the carburetor apart.
     
    post edited by AVB - 2018/09/15 20:29:44
    antson
    New Member
    • Total Posts : 2
    • Scores: 0
    • Reward points: 0
    • Joined: 2018/09/15 19:27:08
    • Status: offline
    Re: Black smoke 2018/09/16 10:21:02 (permalink)
    0
    There were no leaks before and after I took carb apart. I had the black smoke problem BEFORE I took it apart. So for argument sake, play like I didn't take it apart, what could be the cause? Again, air filter was off, a new fuel filter and choke operates normally meaning it is in the open position. At startup it runs fine for a few seconds then runs really rich with black smoke.
    post edited by antson - 2018/09/16 10:53:09
    AVB
    Super Member
    • Total Posts : 595
    • Scores: 24
    • Reward points: 0
    • Joined: 2017/06/21 16:35:48
    • Location: Elora, TN
    • Status: offline
    Re: Black smoke 2018/09/16 12:38:13 (permalink)
    0
    It still can be the bowl gasket set plus the o-ring that hold in place the main jet being harden and shrunken allowing it to unseat under operation. As for bowl gasket set there is separate o-ring on this particular carburetor that goes around the inlet tube that give problems plus it only take a small nick on the bowl gasket to cause problems.I do see that according the the IPL that you are running a fuel problem which can magify any bowl gasket set leakage causing flooding of the carburetor.
     
    I recently sent back a half dozen of these that in from Briggs that had a flaw in them.
    post edited by AVB - 2018/09/16 13:17:29
    Jump to:
    Copyright © 1994 - 2016 Jacks Small Engine & Generator Service, LLC