I have 2-'04 XLT waverunners. One is 50hrs & one is 156hrs. Both were sold from a man from SC & he had them stored in a barn for 8 yrs. Both have been garaged kept & look almost brand new. Both have had the oil injections replaced with upgrades. I want to do two things to these. Replace the impeller w/a more aggressive one & raise the RPM limit by replacing the 100 ohm resistor w/a 50 ohm resister.