Just purchased a Crestliner with this 2004 Nissan 30HP 4-stroke. At WOT the most I can get is about 4500 RPM. The manual states the range should be 5250 to 6250 RPM. It also states that with the long shaft version it would come with a 9.9x11 prop. Mine has a 9.9x10 which as I understand should already be giving me more RPMs. Any suggestions?
