Help with a new Prop. Engine is over reving

[ciccarel]

I am not new to boating, but I am new to inboard Ski Boats. I recently purchased a 1987 Pro Star 190 and love the way that it handles compared to other boats that I have owned. My problem is that It is easy to over rev the motor. If I'm not careful the engine can easily reach 5000 RPM. I understand that the max should be 4600 RPM. From my experience, this is caused by a prop with too low of a pitch. I'm not sure what prop is on the boat. Is there a way to find out what prop I have without removing it from the boat? Does anyone have a recommendation for a prop that will be used for all around use. The manual states that the standard prop is 13" x 13" cupped. Any advice would be appreciated.