I was wondering if anyone has experienced this problem. My 2005 vx110 sport has 19.5 hr.'s on it and it has a rough idle and idles a little high. Out of the water it revs all the way up but in the water under load it won't rev all the way up and it will only reach 37 mph. Any ideas, I pulled the plugs out and they all looked ok, I would like to test the coil packs but I am unsure how. Should I just take it to the dealer or can they test the coil packs if I take them there.