50 HP Mercury, is that the four cylinder engine? I had a four cylinder Mercury and it would idle and run very smoothly. I liked that engine. Owners manuals and service manuals are still easy to find in print and especially in PDF form.
On a carburetor engine, I would stick to premium non-ethanol gas. Ethanol blended fuels need richer fuel to air mixture to be burn efficiently and you don't want to run 2 cycle engines too lean. If you are comfortable adjusting the carburetor or pay a mechanic to adjust it, that might work. Myself, I would stick with premium non-ethanol gas in an carbureted outboad.
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Today's Featured Article - The River Tractor - by Charlie English Jr.. This is a 4010 John Deere that was used to farm on the Diamond Island which is in the Ohio River about 15 miles southwest of Evansville, Indiana. About ten years ago, this tractor was parked close to the bank as the river was washing the bank of the island away.
... [Read Article]
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