I have a jc pump, seemed like there was a lot of water shooting up. thought is was the reverse bucket at first. ch'd it out tonight and its the nylon o-ring on the steering nozel. not the one on diverter (UO/DWN) the next one in (left/right) The top third was blown out of the groove and not sealing. bottom 2/3 was still in place. Think I am loosing thrust? 20' Hawaiin 468 bbc. new motor and pump rebuild (A)w/loader grate and diverter. 5100 rpm at 60.2 GPS. Is this slow or about norm. closed deck, full stringers, no hook. sub floor starting to rot with soggy foam under. thanks