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I own a 1995 Sea Doo Speedster jet boat, With two rotax 657cc engines, I thought I had enough power to do anything I wanted. But when I attempted to pull a good slalom skier out of the water, we came up short. My jet boat will do 57mph. But it it seems to be a little slow coming out of the hole. What can I do to boost the power on the bottom end and still keep what I have on top? Keep in mind I have two engines to deal with for twice the cost.
You can boost the performance of your speedster jet boat with a few basic modifications that won't break the bank. Have the heads milled .030". Replace your stock flame arrestors with aftermarket air filters and the chokes with primer kits. These mods will help give your jet boat the acceleration you are looking for without sacrificing top-end performance.
If you want to go one step further, install aftermarket impellers.
Jet Boat Mechanic,