On the wagendass.com website, you can find a wide range of new starters with a two-year warranty for Mercury/Mariner marine engines.
There is a very common model with two offset mounting brackets, typically found on Mercury Marine 3.0L, 4.3L, 5.0L, and 5.7L engines.
Always check the number of teeth and the center-to-center distances between the mounting holes.
It’s best to have your Mercury or Delco Remy part number—which is a common fitment on this type of boat—to accurately identify the correct model.