A 2 stroke Coleman. It's a truly nasty little piece of gear that I keep around for emergency battery charging. It has a jumper cable plug for 12v @ 80 amps and it will run a 2 or 3 amp, 120v power tool. I've used it fewer than a handful of time in the last dozen years. It weighs less than 25lbs, fits in the helm seat compartment and was a fraction of the cost of a Honda. I have a hard time imagining a scenario where I would inflict that kind of racket and smell on other boaters.