How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Curtis B. Your Own Question

Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 17961
Experience:  have worked on and around most engine models for 35 yrs./Polaris ATV expert
30244710
Type Your Small Engine Question Here...
Curtis B. is online now
A new question is answered every 9 seconds

I have a 12 hp Briggs & Stratton on my riding mower. Forgot

Resolved Question:

I have a 12 hp Briggs & Stratton on my riding mower. Forgot to check the oil, ran it, and right as I was running out of gas while mowing the engine got loud. I shut it off and as the engine wound down there was a loud pop and white smoke came out the top and out of where the air intake is. Two days ago I topped up the oil, it started and i made a couple passes on the lawn but the power was real weak. I would stop, put the clutch in and it would rev up and get real loud, then when I engaged again it was so weak it was practically stalling out. It got so weak I just shut it off, then when I did I got the white smoke coming out again. The engine runs so hard and loud its deafening and I can feel it vibrating the whole mower. Is there any fix to this problem you might reccomend?
Submitted: 11 months ago.
Category: Small Engine
Expert:  Curtis B. replied 11 months ago.

Curtis B. :

Welcome to JUST ANSWER small engines, let me try to help you !!

Curtis B. :

This is the older flat head design engine. You likely have damaged the piston and rings and the only help for ti would be to remove the piston, hone the cylinder to see if it will clean up. then replace the piston and rings with new parts.

Curtis B. :

The white smoke is oil bypassing the piston.

Customer:

I noticed some oil leaking out the bottom of the engine where it attaches to the mower too. This doesn't sound too good, kinda what i expected. I'm going to try and take a shot at fixing it tomorrow...Pretty pricey if I were to bring it in to a repair shop?

Curtis B. :

Is the mower worth putting the time and money in? Or is it time to replace it?

Curtis B. :

Mower shop repair would be expensive, figure 400 to 500 dollars.

Customer:

Time to replace I think. It was an older one..I got it off Craigslist for $300 & mowed my lawn perfectly it's first time. Then this haha.

Customer:

Ok, well thanks for the advice. I'll give it a shot taking it apart tomorrow but given this info, i wont set my hopes too high.

Curtis B. :

Put it back on Craig's list, you can get something for it, somebody will but it for a project!

Customer:

Good call!

Curtis B. :

Here is site with breakdown and parts

Curtis B. :

Here is site for specs.

Customer:

Nice..thank you. I appreciate you answering everything so fully. From what I googled online it sounded like running it without oil had caused permanent damage & it was time to buy a new one...but wanted to hear it from an expert before I think about spending $1k.

Curtis B., Technician
Category: Small Engine
Satisfied Customers: 17961
Experience: have worked on and around most engine models for 35 yrs./Polaris ATV expert
Curtis B. and 3 other Small Engine Specialists are ready to help you

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future. Jimmy Bagley, IA
< Last | Next >
  • You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future. Jimmy Bagley, IA
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
 
 
 

Meet The Experts:

 
 
 
  • Curtis B.

    Technician

    Satisfied Customers:

    6989
    have worked on and around most engine models for 35 yrs./Polaris ATV expert
< Last | Next >
  • http://ww2.justanswer.com/uploads/KO/koboma/2012-6-6_20917_DSCF1022.64x64.JPG Curtis B.'s Avatar

    Curtis B.

    Technician

    Satisfied Customers:

    6989
    have worked on and around most engine models for 35 yrs./Polaris ATV expert
  • http://ww2.justanswer.com/uploads/SM/SmEngPro/2012-8-5_3564_Rick1206290005Edit.fullres.logo.scrn.64x64.jpg Rick's Avatar

    Rick

    Factory Authorized Trainer

    Satisfied Customers:

    4126
    Outdoor Power Equipment technical trainer since 1990, covering eight states.
  • http://ww2.justanswer.com/uploads/GI/giftindex/2011-11-19_2715_JamesLWells500.64x64.jpg James W's Avatar

    James W

    Small Engine Troubleshooting Expert

    Satisfied Customers:

    2978
    7 years as Mechanic & Parts Manager for Brother who has Owned Lawn & Garden Repair shop for 35 years
  • http://ww2.justanswer.com/uploads/jonrk/2010-1-5_22551_jon.jpg Jon K.'s Avatar

    Jon K.

    Small Engine Diagnostic Expert

    Satisfied Customers:

    2950
    Gold certified Stihl tech, Service Manager for a rental/repair shop.Certified in most small engines
  • http://ww2.justanswer.com/uploads/MR/mr2cycle/2011-3-12_03458_sears.64x64.jpg Vince O.'s Avatar

    Vince O.

    Small Engine Technician

    Satisfied Customers:

    2374
    Over 30 years experience repairing lawn and garden equipment. Chainsaws, mowers,blowers and trimmers
  • http://ww2.justanswer.com/uploads/rheisnger/2010-12-31_010856_41385_100001225699183_7012_q.jpg RUSS's Avatar

    RUSS

    SERVICE TECHNICIAN

    Satisfied Customers:

    1723
    28 YEAR SERVICE TECHNICIAN
  • http://ww2.justanswer.com/uploads/BriggsEngines/2010-02-26_230200_n1834842973_4823.jpg CJBennett's Avatar

    CJBennett

    Small Engine Technician

    Satisfied Customers:

    623
    Briggs and Stratton Master Service Tech, Kohler, Tecumseh, Kawasaki certified. 18 years exp.