I do have some experience with Methanol(Alcohol) on Mercury Racing Engines, but was wondering what needed to be done to the gas 26cc engine to tun Methanol. It has a walbro carb. I know rulle of thumb on alcohol is double the fuel as regular gas and the motor needs to be run on regular gas when ur done for the day to keep motor from absorbing moisture and rusting the crank etc.......Can u adjust the air/fuel on the carb enough or will it require more mods, or a different carb? Thanks in advance. and im sure u have to run a castor based oil, as I already have several bottles of Klotz R-50 and Klotz Benol.

Others may be more experienced in the carby aspect but I'm just wondering why you would want to change to methanol. Cost is so much more for everything in the fuel and unless the engine is modified for alcohol burning I don't see the point. It is not necessarily an instant power boost if that is the reason.

You need to double the area, (not drill size) of the orifices in the carb. You will also need to enlarge the hole in the fuel entry where the needle valve is located. Be careful with that one as if you get it too big the needle valve will not seal and/or be too low.

Or, you could use a WT-499 Walbro carb. It is designed for a Zenoah 23/26cc running on alcohol.

Power does increase....

AV8TOR

Thanks av8er.. and it is modified bluejets.. Ports have been worked and its fingerported on the intake side. And i don't see how it wouldn't make a big difference in power.. It's been proven many times.

Methanol increases power due to the fact that even though it has a lower BTU than gasoline, the engine consumes twice as much of it. Additional factors are that it helps cool the intake mixture, etc. If the engine is purpose built for methanol, the gains are even higher, as the engine can be built with a much higher compression ratio when using methanol.

A higher compression ratio, given that the engine is going to be using a fuel that has enough octane, is all good. It is one of those few things when designing or modifying an engine that has no drawbacks. It increases torque and power all throughout the power range, and makes the engine more efficient.

AV8TOR

Like I said, I have experience with alcohol in Merc Drag Motors..That's why u have double the size injectors. U also can run more timing with alcohol... So I understand how it works, jus needed some guidance on it with the small motors..

In the top post, it appeared that the engine was an off the shelf item.
I am aware of the changes methanol can give.
If you're into methanol and you don't mind the cost, and you want some power with broader (less touchy) needle settings,
then lower the compression, add 50% nitro and really blow the cobwebs out of the top of the bore.