View Full Version : Mower runs rough after about 4 hours

04-20-2010, 08:33 AM
I have a 17 HP Kawi. on a scag 52 hydro and it runs good for the first few hours of the day and then it starts to run like its on one cylinder and if you let it set for a few it will run good again. I am thinking the coils but just wanted to get any opinions before i start throwing parts at it....


04-20-2010, 06:09 PM

When the engine starts running bad remove each plug wire one at a time with rubber handled pliers, If you pull one off and the engine shuts down the coil on the other side is bad. If the engine doesn't shut down pulling the plug wires your problem lays else where.

Can you post the model AND spec numbers off the bar code label on the engine block ?

04-20-2010, 06:42 PM
Try a new fuel filter!

04-20-2010, 08:49 PM
Are you by chance pulling a vacuum in the gas tank? Loosen the gas cap when it starts missing to see if that makes a difference?

04-20-2010, 08:50 PM
work half days :drinkup: