My Honda met its match with a piece of flagstone and has a bent shaft. I am going to put a new engine on it since the frame/chassis is in great shape. It looks to be pretty sraight forward; are there any tricks or tips? Anything I should replace (preventative maintenance) while I am doing it? I can get the engine online with free shipping for $425 to my door. Definitely cheaper than a new machine. $425 vs $1300. Also, do I have the option to go to a larger commercial grade Honda engine with more power? Suggestions? I haven't looked to see what might fit e.g. shaft sies and mount bolt patterns. I live in Seattle and th grass here is wet 90% of he time and I mulch 99% of the time; so more power would be nice. Actually, a lot more power. Before the bent shaft I put around 400 hours on it with the engine at 4200rpms with no problems; that helped a lot. I figured if it blew up I would put on a new engine or do what I should have done and bought a Toro. They mulch much better IMO. The other option is to sell it with full disclosure, cut my losses and get a new Toro. I am also an aircraft mechanic so I am pretty handy with tools.