Anodized or stainless steel components. Any type of alcohol is hard on a fuel system and rubber components. Plus you have to flow a good bit more fuel then gas. The carbs can be made to accommodate all this, even with a shorter service life. As far as I'm aware, walbro doesn't Anodized their carbs. The obr 1242 is a jerked off 1107 from what I understand. Not a bad carb by any means, but you could do the same with a standard carb if you want. I know they tweaked the pop pressure, comes std with an ethonal resistant primer and a spiral diaphragm. It should flow enough to handle the needs of methanol. I would still expect to have to advance timing and run it on gas to help flush the system when your done with it. It's a high maintenance kinda thing. 30% more power is optimistic imo as well. While back there was a guy dynoing these little engines and obr was good but not the 9hp good. They make outstanding engines and I won't knock them, just take the rating with a grain of salt. If your any good at porting you can easily achieve the same results. Another thing to consider is a lot of two stroke oils Don't mix with alcohol. I favor klotz oils, but there are many other out there that blend well. Caster (bean oil) is a crowd favorite. Nothing wrong with it. Very old school. I would also look into fogging oil before storage. I can't say enough how much alcohol attracts water and water will destroy everything in the engine.
But it's fun to play with other fuels.
