Lawn-Boy 20 walk behind self propelled lawn mower lawnmower. Cleaned the carb and replaced the air filter, spark plug. This has the blade brake system also. For sale locally also so can end early.The item "Lawn Boy 20 walk behind self propelled lawn mower lawnmower with blade brake" is in sale since Sunday, May 5, 2019. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Lawn Mowers\Walk-Behind Lawn Mowers". The seller is "kratebob" and is located in Chicago, Illinois. This item can't be shipped, the buyer must pick up the item.