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: 12592
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 Kohler 22HP engine SV620S-0017. It will idle but if

Customer Question

I have a Kohler 22HP engine SV620S-0017. It will idle but if I sowers the idle up to full throttle it starts surging like its out of gas. Any suggestions on what could be causing this?
Submitted: 1 year ago.
Category: Small Engine
Customer: replied 1 year ago.
As long as the throttle is slow there are no issues, but once the throttle is sped up it runs rough. We purchased this mower used and have mowed with it once with no issues. Since that one time we have had issues with it running and are not able took with it at all.
Expert:  Curtis B. replied 1 year ago.
Welcome to JUST ANSWER small engines, let me try to help you !! Surging can be caused by lack of fuel. Do you have good fuel flow to the carburetor from the fuel pump? Has fuel filter been replaced ?
Customer: replied 1 year ago.
Yes and yes the fuel filter was replaced a couple of weeks ago.
Expert:  Curtis B. replied 1 year ago.
New spark plug? and air filter?
Customer: replied 1 year ago.
Yes
Expert:  Curtis B. replied 1 year ago.
Have you removed the carburetor float bowl to see if it has any debris?
Customer: replied 1 year ago.
Yes and cleaned it and re-assembled it and put it back on with new gaskets ETC
Customer: replied 1 year ago.
Yes and there is nothing there.
Expert:  Curtis B. replied 1 year ago.
Have you checked the valves . .005 intake, .007 exhaust.
Expert:  Curtis B. replied 1 year ago.
http://www.kohlerengines.com/onlinecatalog/pdf/tp_2548_a.pdf