The most important part on any jet boat, yet probably the most neglected part on them as well. ALWAYS...and I mean ALWAYS...check the tightness on your nozzle bolts prior to launching. All it takes is an allen wrench and about 10 - 15 seconds.
The nozzle, aside from the throttle, is your only form of control on a jet boat. Not sure if any of you remember, but several years back there was a jet boat being used as a competition ski boat that ended up in the grand stands. People were injured badly and I think a few were killed. Well, investigation revealed that the tiller pin had fallen out because the maintenance crew had failed to check the bolts on them.
All because of someone else's negligence people were hurt and killed.
Guys, those pins are your life. Those pins are someone else's life. One of those pins ends up missing, you now compromise the controlability of that boat. Once the controlability is compromised, so is the safety of yourself as the driver, as well as your passengers and others around you. No tiller pin, no steering. No reverse pin, no brakes. It's that simple.
So everytime you launch, ALWAYS remember to check your nozzle pin bolts. It could mean your life. It can also mean someone else's life.