Just a side point here, you say you find Yamahas better than Mariners you've owned. But I own a Mariner 8 and a 25 two stroke, and both are Yamahas under the decals. Mariner parts are now either extinct or overpriced. But the same parts are current and widely available for Yamahas -- all I've had to do is translate the part numbers (the only difference) by looking at exploded views of Yamahas of the same vintage and type. Well, I shouldn't say "Yamahas" like it's something different. What I have is a Yamaha with a orange and red striped paint scheme, and the word "Mariner" stuck on it. And frankly, I'm grateful for that. My 25, pushed a ten thousand pound houseboat 2700 miles down the east coast, across Florida through Okeechobie to the west coast of FL, and I lived aboard that boat, off and on for ten years. That same motor is still in great running condition. My 8hp is now 35 years old and powering my 1958 Crestliner chasing crappies, large and smallmouth, and transporting my family to island campsites.
Well apologies for being slightly OT. But the value of a Yamaha 2 cy of that vintage? I wouldn't sell either of mine, so, priceless.