Sounds like you have the same problem I had when I got mine. I had to really force them and I weigh 220 lbs. Boat had been neglected after in salt water and the plastic spacers in the nozzle and reverse bucket expanded, and were too tight and I could barely move by throttle/gear levers. Pull them off from back of jet and get dremel tool or file and sand down the plastic pieces until the bolts move freely in them. Don't take the boat out until you do this, as levers don't move freely and it's dangerous! Enjoy the boat, you'll love the merc reliability!