I have a 17.6 Sea chaser RG with a 70 hsp yamaha. I have ballistic stainless prop 13 5/8 x 17 that gets a terrible hole shot n fuel mileage. I had the factory prop 13 1/4 x17 that would get out of the hole but will only turn about 4800 . I am looking for any answers to fix my problem. I am...