I've just converted a 26cc stihl out of a FS-86 weedwaker. My first run on it with gas/glow and a 16x8 APC-W was 7500 and it was jumping to 7800 at times (the tank got loose and the fuel line had some airbubbles). Just wondering if anybody else has converted this engine or something similar to compare numbers.
also its got the original carb which is a 9.5mm walbro I have a 13.5mm that could go on it. Will the 13.5mm carb be to much for a 26cc?

Thanks