THE PURPOSE AND USE OF A FUEL RESERVE TANK
Riding a PWC can be a ton of fun, so it is easy to lose track of time when you are darting about the waterways. But a PWC does not have room for oars to row ashore. Most PWCs have a built-in reserve fuel tank that holds a gallon of fuel. Keep a close eye on fuel levels, and head for shore if you have had to switch to the reserve fuel tank.
THE 1/3 RULE: When operating a PWC always abide by the 1/3 rule; use 1/3 of your fuel to operate, keep 1/3 of your fuel to get back to shore, and keep the other 1/3 as a reserve in case of emergency.