Williams DieselJet 505
The Williams DieselJet 505 is a compact diesel-powered jet tender designed for larger yachts, combining low-profile stowage, guest transport and watersports capability.
The Williams DieselJet 505 measures 5.03 metres overall with a 2.01-metre beam. Williams publishes a dry weight of 905kg and seating for eight plus one person.
Power is provided by a Yanmar 4JH 110hp diesel engine driving the jet system. Fuel capacity is 68 litres.
Machinery and propulsion
Yanmar 4JH 110 hp diesel engine with jet propulsion.
Propulsion: Waterjet
Official manufacturer information
View the manufacturer's current information for this tender model or platform.
Verification
Status: Editorially Verified · Last verified 20 July 2026
Specifications can change between build configurations. Buyers should confirm final dimensions, machinery, capacity, performance and equipment directly with the manufacturer before ordering.