I just purchased a boat with a 1993 2-cyl Johnson 50 HP motor. Model VJ50TLETB. PO diclosed that the motor was bad. Looks like it has one bad cylinder, Cyl 1 tested at 155 psi, Cyl 2 tested at 120 psi. I guess the motor will start and run OK initially, then bogs down as it gets warm, makes...