HPJunkie

I just makesure I use 92-93 octane if in doubt I occasionally add octane booster. Some pumps have only 91 octane. I run the motor 110 -120 degrees. Also you have to remember that this boat is not run at full throttle for more that 10-20 seconds Then back down to 2-3500 rpm (cruising speed). After a top speed blast the temp only rises to 140 or so. I think that if my boat were a big heavy offshore machine, and or if i really loaded the motor and lugged it down to say 5000 rpm @ top speed and held it there for say 30sec-2 minutes and let some serious heat build up I would have more troubles. Does that make sense? I dont know for sure. The plugs look like new with no signs of detonation compression is good 160-170 per cylinder ( which is High) According to the guys on this forum I have too much compression and too many rpms and too much boost. I am probably on the edge. Greg