22 briggs intek

Discussion in 'Mechanic and Repair' started by AWABUKIE, Jul 18, 2006.

  1. AWABUKIE

    AWABUKIE LawnSite Member
    Posts: 13

    I have a 22 briggs intek model 40h777...type oo26E.The engine started to back fire while running...yhen went to half power.I tried to start it on just the right plug and it started.When I tried to start it on the left plug it just back fired....Any suggestions
     
  2. FIXDISS

    FIXDISS LawnSite Senior Member
    Posts: 445

    Pull the spark plug on left side and then attatch the boot to it. Remove the right spark plug boot so it doesn't start. Ground the plug from left side to the head fin and spin engine w/starter. If you do not get a crisp blue spark then you probably have a bad coil on that side. If you get good spark then you may have a valve adjustment issue or a vaccuum leak on intake.
     
  3. AWABUKIE

    AWABUKIE LawnSite Member
    Posts: 13

    Thanks for reply...I have good spark...vacuum leak sounds difficult...and expensive...is it possible dirt in carb...or exhaust cant get out.
     
  4. FIXDISS

    FIXDISS LawnSite Senior Member
    Posts: 445

    Watch for a response from Restrorob here.He's the expert. As far as the vaccuum leak just check to make sure the bolts/nuts are tight on carb and intake. I really think since you have good spark it could be a valve issue. Did it make any kind of fluttering sound when it happenned ?
     
  5. AWABUKIE

    AWABUKIE LawnSite Member
    Posts: 13

    No fluttering sound ...just loud back fire...now that piston just has no more power...with out the back fire...I will retighten everything tomorrow and see what happens...thanks again for response.
     
  6. FIXDISS

    FIXDISS LawnSite Senior Member
    Posts: 445

    OK. Good luck. I am really thinking that if you have good spark that it is possibly a push rod bent or the fastenner on rocker arm has backed off causing valve not to open properly. Like I said, watch for Restrorob to respond.
     
  7. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,024

    Pull the valve cover off the affected cylinder and I'll bet you a :drinkup: that you find a bent push-rod as FIXDISS said.
     
  8. AWABUKIE

    AWABUKIE LawnSite Member
    Posts: 13

    I opened up the valve cover and sure enough a push rod had fallen off,it was not bent though,so I stuck it back in place.I then went to crank the engine...nothing but backfire...any more suggestions at this point.
     
  9. newz7151

    newz7151 LawnSite Silver Member
    from Tejas
    Posts: 2,419


    Not to demean you in any way. But it doesn't sound from your posting in this thread that you are inclined in the right areas to handle this. If you intend to keep this engine, I would recommend that you take it to a shop before you cause further irrepairable damage.
     
  10. Jim@MilkyWay

    Jim@MilkyWay LawnSite Senior Member
    Posts: 472

    Roger that.
     

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