Never repower a push mower yet except 22156 And did that myself. They go dump if engine blows. Repower various Walks at above prices. Dealers charge $100 to do a hydro fluid change. So imagine repower on a push at least that or more. Going to attempt a 240 Command Kohler on 22290 this Winter. Would seem a waste to put 200 on the 30 w/the 240 avail.