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: 12172
Experience:  have worked on and around most engine models for 35 yrs./Polaris ATV expert
Type Your Small Engine Question Here...
Curtis B. is online now
A new question is answered every 9 seconds

I am getting a popping sound when I pull-start my lawn

Customer Question

Hi, I am getting a popping sound when I pull-start my lawn mower. I have recent gas with stabilizer and a new spark plug; it just pops and won't start.
JA: Do you have fuel in the tank? If so, is the shut-off valve open and the fuel clean?
Customer: Yes to both.
JA: Do you plan on doing the work yourself?
Customer: I can
JA: Anything else we should know to help you best?
Customer: I haven't changed the air filter, but it was running fine an hour ago...
JA: OK. Got it. I'm sending you to a secure page on JustAnswer so you can place the $5 fully-refundable deposit now. While you're filling out that form, I'll tell the Small Engine Technician about your situation and then connect you two.
Submitted: 3 months ago.
Category: Small Engine
Expert:  JON replied 3 months ago.

Check the flywheel key. It sounds as though the timing has been thrown off for some reason. Has anything been hit recently?