02 seadoo don't run

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    2002 seadoo gtx di turns off

    hello i have a 02 seadoo gtx di,just last week while in the water, from doing 50-55 it started to slow down 25-35 mph.and suddenly pick up to 55 again but only for about 2 min, took it out of the water change the spark plugs,check cylinder compression it read 110 psi on both cyls, fuel pump...