I'm not a particular advocate of gasoline engines on sailboats, but is that really true? Sailboat manufacturers used the Atomic 4 for decades and never tried again. The A4 was developed in the 1940s and was already pretty technologically long in the tooth by the time it hit its heyday in the 70s. Still, it was one of the most successful sailboat engines of all time and still has a cult following among some. And even as gasoline was declared unfit for inboard sailboat use, powerboats under 40 feet have continued to predominantly use gasoline engines. I'm not convinced that the 75 years of gasoline engine advancement since the A4 couldn't be brought to bear in creating a safe, reliable, economical modern gasoline sailboat engine. However, no boat or engine manufacturer has any incentive in the current market to try.They are far better suited to sailboats than gasoline engines are, hence you never see gas inboards any more.