Run 89 in that motor as recommended in the manual and keep it stabilized (even during the season unless you are burning through a tank every two weeks). You could siphon off the gas and use it in cars or lawn equipment or you could add some 93 back to whatever is left of the 87.
2 parts 87 to 1 part 93 = 89.
Previous: 1993 Prostar 205
Red 1998 Closed Bow Ski Boat, Ford 351, 310 hp, Acme 4 blade, Perfect Pass SG.
Tyler Ski Club
To me, this forum is about love of inboard boats. It is about the sharing of information and, on a good day, some humor. It is not about post count, brand of boat, or any other superfluous labels that lend themselves to a false sense of superiority. Please, respect one another, try to pass on accurate information, and keep your eye on the ball.