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Introduction and Briggs issue

Discussion in 'Mechanic and Repair' started by Rob K77, Sep 26, 2006.

  1. Rob K77

    Rob K77 LawnSite Member
    Messages: 2

    Hello all,

    New to the board, seems very informative thus far.

    I have a 14 HP B&S Motor, Model 287707.

    It was running a little low on oil and I topped it off with 10w30 on two different occasions, maybe 6-8 oz. of 10w30 total. Recently it started blowing oil into the air filter area and stalled the engine. It's coming out of the hose that comes from the breather. I changed the oil, ran straight 30 weight this time, and it's still blowing oil. Is the breather assembly bad or can it be cleaned or do I have a different problem?


  2. Ru55ell

    Ru55ell LawnSite Member
    from Florida
    Messages: 15

    I think you have too much oil in it.
  3. Rob K77

    Rob K77 LawnSite Member
    Messages: 2

    I'm positive it's not over filled. I only wish that was the problem.
  4. barnard

    barnard LawnSite Senior Member
    Messages: 618

    You have a leaking head gasket leaking compression from the cylinder into the push rod cavity. This pressurizes the crankcase and blows oil out the crankcase vent into the air filter.Guaranteed.Been there , fixed that.(same engine)
  5. gm3100

    gm3100 LawnSite Member
    Messages: 9

    I had similar situation using multi viscosity engine oil. Quickly went back to straight 30wt. and the problem went away.
    Also, verify dipstick o-ring is not damaged or pinched.
    I have had many of these engines over the years and only time i saw these issues was for the causes listed above. Besides it is cheap to change the oil and be sure.

  6. Jim@MilkyWay

    Jim@MilkyWay LawnSite Senior Member
    Messages: 472

    Excuse me?;)
    Is there any chance that you could somehow send supporting documentation for your observation?
  7. pugs

    pugs LawnSite Gold Member
    Messages: 3,025

    Yah, those briggs single OHV engines will do that. Although I have not seen this stall the engine. Usually it will just turn the engine into a mosquito fogger ;)

    Do a leakdown test and see what you come up with...
  8. gm3100

    gm3100 LawnSite Member
    Messages: 9

    the only thing i could find to support my seemingly wrong response is a bulletin number 669, date 2/19/98, Within the power portal at briggs network.

    although it does not specify the model number listed, it does explain faulty o-rings as a misdiagnoses for failed engines.

    I typically don't document my observations as Thoreau may have . A forum is supposed to be a place to exchange ideas and work through problems together, what worked for me is what I was posting. So "excuse me" and have a nice day.
  9. Jim@MilkyWay

    Jim@MilkyWay LawnSite Senior Member
    Messages: 472

    First of all, welcome to the forum.
    Thoreau is one of my main 19th century heroes, behind William Herschel, astronomer extraordinaire. You could not have picked a better comparison.
    Didn't mean to ruffle your feathers, just like to learn whenever and wherever possible. I have been doing this, shade tree level only, for a long time and have never heard of a substantiated conflict arising from the switch to multi grade lube.
    Tried to find the bulletin you referred to but did not go crazy doing so. Send me a link, and _you_ have a nice day.
  10. newz7151

    newz7151 LawnSite Silver Member
    from Tejas
    Messages: 2,419

    Are you an Authorized Briggs dealer? If not, you won't be able to access the link at the Powerportal.com .

    And even if you CAN access it, the shitty way that Briggs screwed everything up when they moved everything to thepowerportal.com makes it almost impossible to find SB 669 now.

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