I have a 2000 Maxum 2400 scr. Bought at 200 ft. elevation. Stock main jets 1.65, power valve jet .90. Gear ratio is 1.62:1. Mercruiser 305 cid 220hp.
Now run at 6200 ft elevation. Changed main jets to 1.45 and power valve jet to .74 per Mercruiser tech. Prop was a 15/16 4 blade, now 15/15 3...