i think advances in and lightning up piston engines is what killed off the rotary. i read that article on s and F and its a really good one. i dont know if you know this, they have a couple of mud boat builders that use mazda rotaries in the mudboats. in mud boats its not the weight that really matters as much as the amount of space the engine takes up, so that make the rotary a prime candidate. my good friend actually has one in his mud boat. i think its a 170 hp i would have to check. but it definitely out performs the other popular engines to install in that size boat i.e. subaru's and 4.3 chevy's, toyota 22r's. the rotary;s are just a tad more expensive but they run.
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