Depends upon fuel tank size, how much throttle you give the boat etc. I would imagine you can get and hour or two on a typical built in tank if you are not at full throttle.
Not sure if this model has the option. but some motors with built in tanks can also draw from an auxiliary tank as well.
Marty
Not sure if this model has the option. but some motors with built in tanks can also draw from an auxiliary tank as well.
Marty