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: 26038
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 older 12.5 hp on cub cadet. Seems to go bad on fuel

Customer Question

I have a older 12.5 hp on cub cadet. Seems to go bad on fuel after 20 min . If I move butterfly valve back and forth it will run without load on it. After cool down it will run.
Submitted: 1 year ago.
Category: Small Engine
Expert:  Curtis B. replied 1 year ago.

Does the carburetor have the electric solenoid in the base of it?

Expert:  Curtis B. replied 1 year ago.

Does engine ever quit, or you can keep it going?

Customer: replied 1 year ago.
No
Expert:  Curtis B. replied 1 year ago.

Engine has a mechanical fuel pump. Locate the pump inlet and make a test line to bypass the tank and outlet line. Drop line into the tank filler. You may have a restriction in the supply from tank.

Customer: replied 1 year ago.
Alteady did all that. Would it be fuel pump that would faulted after it gets hot
Expert:  Curtis B. replied 1 year ago.

Has to be loosing spark or fuel and fuel seems to fit!

Customer: replied 1 year ago.
I can keep it running by moving butter fly on carb but can't put load on it
Expert:  Curtis B. replied 1 year ago.

Fuel starvation, see if you can run the fuel test.

Expert:  Curtis B. replied 1 year ago.

Sorry, I see you said you did that! Seems unlikely a mechanical fuel pump would be affected by heat.

Expert:  Curtis B. replied 1 year ago.

An d you said no solenoid in carb?

Customer: replied 1 year ago.
I don't believe if it does can I replace
Expert:  Curtis B. replied 1 year ago.

you can replace with bowl bolt, or disable it by removing the inner tip.

Customer: replied 1 year ago.
Thanks appreciate it
Expert:  Curtis B. replied 1 year ago.

Thank you.