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: 13023
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

Second opinion] - The engine speed is surging, then dies

Customer Question

Second opinion] - The engine speed is surging, then dies under a load.
throttle return spring coils look to be streached out
throttle arm moves back & forth with engine vibration
Submitted: 8 months ago.
Category: Small Engine
Expert:  Curtis B. replied 8 months ago.

Make and model? Sounds more like fuel starvation, than problem with the springs. When did engine last run?

Customer: replied 8 months ago.
I should have refered to the governer spring & lever
it goes all the way back to the stop position killing
the engine. it is a Briggs & Stratton, 3 hp J 607
Power Master mower about 30 yrs old
Expert:  Curtis B. replied 8 months ago.

Governor is doing what it should do. It's trying to compensate for lack of fuel Have you checked for fuel to the carburetor? Is this tank mounted carb?