RedactedNarrative: On Friday 07/09/2021, at approximately 1300 hrs Game Warden (GW) was contacted by Cowley County Dispatch about a boat accident at the Winfield City Lake.  GW advised he would be enroute to take a report.  GW arrived at the city lake at approximately 1320 hrs and found a pontoon boat at the main boat ramp beached on the rock jetty protecting the ramp.  GW made contact with the boat owner/operator and WPD Officer.  GW asked the operator what happened.  The Operator advised that he was unloading the boat from the trailer, and after backing away, he placed the throttle in neutral then into forward and the boat lurched forward at full speed.  Operator advised that when he pulled the throttle back to neutral the boat didn't stop, so he pulled the kill switch but not after the boat beached on the rock jetty.  GW asked Operator if the had any work done on the boat, and Operator advised that the boat was in the shop all of 2020 getting new skirting replaced around the whole boat.  GW asked Operator if he had consumed any alcohol that day.  Operator advised he had not and that he doesn't drink.  GW had Operator fill out a statement form and GW photographed damages and checked the boat throttle.  GW found that the throttle did have an apparent problem in that it was very difficult to move if at all.  GW could not move the throttle forward or back without breaking something.  A tow truck arrived and pulled the boat off the shore and then Operator and some bystanders loaded the boat on the trailer by hand and with ropes.  GW finished gathering required information and cleared the scene at approximately 1450 hrs.  Nothing further to report at this time.