it looks like many have this problem i hope someone can answer mine when im below 3ooo rpm the engine temp sits at 160-170 when i run at full trottle it goes up to 200-210 until i slow down the temp goes back to 160-170 the motor i have is 1992 aq 131 fresh water and closed cooled also it looks like there is alot of air bubbles coming out the out drive also is there a pump in the out drive to suck up the water or is it just the impeller thats curculating water what would cause air bubbles would this have anything to do with the temp changes and would a higher octane lower motor temp..??? 