I have a 91 Parker 17' - Bought it new, it's always been a great boat for the kind of fishing and boating I do. When I purchased the boat in 91 it had an 85 Yamaha on it. I never liked the motor as it never would idle just right plus you had to mix the gas & oil. After about a year I purchased a 90 Yamaha 2 stroke which had the fuel injection, this was a very good motor and the boat ran great with it. I ended up not using the boat for a couple of years and it sat in the garage, the carbs got messed up and it would not run right. A couple of years ago I traded in the 90 2 stroke and got a new 90 4 stroke. I love this motor, the boat will "fly" and has great "out of the hole" power. The only thing with the 4 stroke is the motor is about 100 lbs. heavier and sits the stern of the boat a few inches lower in the water. The engine has very good power is very quiet and you don't have the 2 stoke fumes. I'm very happy with this little boat and motor.