Its a long story, but I bought this engine that was supposably locked up, I tore it apart, replaced main bearings, put it back together, and it was still messed up. The carbs were filled with garbage, I cleaned them all out, replaced what need replacing, and now I'm trying to get her to run good. I bought some cheap Amazon vacuum gauges which turned out to be garbage, so I tried to tune it by ear, kinda....