Cool William!
Your engines' fuel consumption is historical. You're quoting 'hull speed', RIGHT?

Because that's right up there with a diesel.Good thing you don't mention the type of engine that you claim can fail during your crap shoot. If you would have specified diesels,,,well, you'd have a LOT of egg on your face.And there is a reason for all those A4 'service and repair' resources.And you're right about simple repairs. I hauled my A4 out of the boat and swapped-out the broken crank right on the pier. Too bad I had to find out how TRULY simple they are built. (four cylinders, TWO main bearings!

) But then too, they weigh twice as much as an equivalent diesel. Remember, they can never produce 30 horse power without exploding. That's why they're called Atomic.William, do this for all of us here in diesel-land; Fill your fuel tank. Contact a buddie and have him follow you with his boat, out of the location that you keep your boat. Start your stopwatch. Advance your throttle to wide-open. Note the elapsed time that your engine explodes. Have your friend tow you back to the fuel dock. Replace the fuel used. Divide the quart of gas into the elapsed run-time that failure occurred. Fuel consumption would equal about a gallon and a half per hour. Next step, replace with a diesel. Let's see, what else, re-reading,,,, Oh! "Fair mechanic" required to work on a diesel?! That's a myth propagated by A4 owners! There's is little to NOTHING to do to maintain a diesel. Let's see,,,change the oil. Do you change oil on your A4? What else? Oh, check valve clearance every few years. Does your A4 need that? What else? Clean fuel. There's a biggy. Does your A4 need clean fuel? Thinking,,,let's see, Oh yeah, replace water-pump impeller on the raw water side. The fresh water side needs an occasional anti freeze change too. Do you change anti freeze, or is your A4 raw water cooled? 37 years old, I doubt it. What else? How about prop-shaft alignment? Do you have a prop shaft? (silly me, of course you do) What else? Hmmm, Bleeding the fuel after a filter change. You change filters don't you? You don't bleed and you installed an electric pump. Well, lots of diesel owners did that too, to simplify bleeding. (hint to all you A4 owners; IT'S REALLY EASY.

) Lordy, I'm fresh out of stuff to do to a diesel. Injector service is too rare to consider as maintenance. Anything left on your A4? What? Tune-ups? Timing? Spark plugs? Cap and rotor? Plug wires? No points though, you got rid of 'em. Hey! How does it run without a battery and the electrical system working perfectly? And speaking of electrical system, DO YOU HAVE ONE IN YOUR BOAT? I doubt you have much of one. An A4 drives the alternator too slow for decent output. Must have a gas powered generator huh? I hear those are pretty good.

Of course, using one fuel aboard is a good thing. Too bad that fuel can EXPLODE!