Hey whats going on i am kind of new to boating. I have owned my 2007 Reinell fns 186 with 4 cylinder volvo penta enigine for about a year. I have taken the boat to many lakes and it has always performed perfectly great boat. But this weekend i went to Tahoe and my boat was not performing at all. First off when we launched and got out of the bay everything was good but once i got out to the water the lake just eat me up my boat was not accelerating at all, the rpms would go to 30-35k but i was treading at 10mph's i had 4 people in the boat including my self but i always have four people in the boat. My prop is a 21 pitch prop that came stock with the boat. I realize that altitude would play a part but to only go 10mph's. I am highly confused and worried. could some one give me some pointers on what i should do? thanks guys
