Bought my 2007 505 sxf used, but very low time, e-start only good for about two starts, then it bogs like the batt. is dieing. I,ve tried new batt, starter, high-output stater, new larger ignition cables, reg/rectifier checks good, multiple new batteries were no help. Starts fine with batt. charger/booster, idles effortlesly, runs clean take of to top end. Could it be auto compression release malfunction, what HELP! PLEASE