A 21 inch rear wheel drive mower with a 170cc engine and an automatic choke for $339.99. Strong drive, and a smoking problem owners cannot explain away.

A 21 inch rear wheel drive mower with a 170cc engine at $417.27. The most expensive PowerSmart, the worst rating, and a listing with impossible specs.

A 22 inch self-propelled mower with a 170cc engine and an automatic choke. Its 3.9 stars come from one product, not a pool of five.

An 18 inch push mower with a 144cc engine, an automatic choke and the joint highest rating in the category. The safest $199.99 in gas mowing.