Great looking engine Doug. I really like the looks of that block! Those engines are great in the dune buggy style karts. I've seen some in mini bikes as well but no idea how they fit them in that small space. Must have used a shoe horn!
How does this compare to the Predator 459? Which is better? The Duromax makes more power with less CC's. How are they achieving that? I'm putting one in a golf cart.
I have not played with the Predator so I can not offer a comparison but I suspect the higher power from lower ccs would likely be due to slightly higher compression ratio.
I suspect that 18hp 440 would be a bit of overkill for a tablesaw, even big professional cabinet table saws are only in the 2-3 hp range. Of course it would likely depend on the ratio of the belt pulleys you use. Perhaps a 212cc class machine would be better. You would have to look around but they are available with electric start too if that is an important feature.