My Brother Just Bought A Mercury 9.8hp Mod.#6264441 Outboard. I Think It Is A 1983. I Put The Engine On My 14 Foot Aluminum Boat Yesterday For A Test Drive. Engine Did Very Well At First. Brought Boat Up On Plane Fast. But, After About A 1/4 Mile Or So The Engine Rpms Went Threw The Roof And The Boat Came To A Crawl. I Cranked Back The Throttle And Came To A Stop. Nothing Wrapped Aroung Prop Tryed Again. No Luck. Engine Will Only Power Boat At Very Low Speed Before Rpms Reaise And I Suspect Prop Starts To Slip. I Also Found The Engine Will Not Power Boat In Revese At All. Put Engine On Motor Stand And Checked Prop. Prop Spins Freely In Neutral, Spins With Little Effort In Forward With A Clicking Sound And Will Not Spin Counter Clockwise, Spins With Some Effort In Reverse Clockwise And Counter Clockwise. I Would Greatly Appreciate Some Help In Order To Resolve This Problem. Thanks
