Probably not. There is a little white-beige ceramic block a little bigger than a small box of stick matches typically mounted on the fire-wall-bulkhead of the engine compartment called a "balance resistor". The entire engine ignition electrical system runs through it to control electrical surges to the harness. Cabin Cruisers, being self contained off the community electrical grid are still predictable, easy, but considerably more complex than your car.
Due to weather-humidity extremes, typical on the water, this ceramic block may develop a hairline crack through it. The surge of the battery and coil is enough to jump the crack and start the engine. But the post start switch-over to the alternator is just enough of a break in the ignition circuit to kill the engine. Part? $40.00 , labor? $150.00 (1 hr.) You might think of adding a dedicated battery for starting one engine...then charging both.
Have a great season !