1976-1983 JOHNSON SEAHORSE 90 HP MOTOR.

I SPUN THE ORIGINAL PROP AND HAVE SEVERAL OLDER SPARES.

I HAVE LOST SPEED AND CAN NOT PLANE ANYMORE.

WHAT SIZE PROP SHOULD I USE.

I USED TO DO 22MPH AT 4K RPM.

NOW I CAN ONLY DO 15MPH AND AT 3K AND THE BOAT WILL NOT PLANE.

MY THREE SPARE PROPS ARE ALL SMALLER THAN THE STOCK PROP.

IT WOULD BE GREAT TO DO MORE THAN 22MPH................