Finally managed to get the 12 HP installed in my 106. Had real issues with the eBay replacement carb. First off the fuel bowl overfilled & gasoline just poured out. Pulled bowl to adjust float, then again & again. The tab on the float is horrible thin & the slightest effort bends it. Finally got float level adjusted & engine started but then couldn’t “tune” the carb to get satisfactory result. I installed the original carb off the 10 HP only cleaning it with brake cleaner. Runs & adjusts ok but needs throttle shaft reworked. Idles well & transition to high speed is good. At governed, no load speed it’s not as stable as I’d like. I’m sure it’s pulling air around throttle shaft.