A professional who assists motorboat mechanic in repairing gasoline- or diesel-powered motorboats. Respnsibilities include:

• Removes pumps, generators, and other engine accessories, using handtools.
• Removes engine head and oil pan to dismantle engine.
• Removes covers of gear and clutch units or removes entire assemblies as instructed.
• Washes and cleans disassembled parts.
• Assists in reassembly of repaired engines.
• Performs other duties as described under helper master title.