This is my first jet boat. Just bought a 94 Cheyenne 19 tunnel. Has a 468 solid roller dart pro 1 heads jesel belt drive 13.5 to 1 comp and a 1050 dominator. Supposedly dynoed at 680 hp. It is a berkly jet with droop. Just tore pump apart. Has Alot of play in it. The impeller is bronze cant find any markings on it. Also has an inducer. Took it to river and top speed only 80 and seems slow take off. Turns 6200 and raps to around 7300 on take off. Previous owner claimed 106 mph. Don't know if I believe but figured in the 90s. Am I wrong or is something wrong with boat and what to improve speed. Thanks for any help.