17.5 HP Riding Lawn Mower Engine

Added: 2026-05-25

[00:00:00]If you're looking for a new engine for your riding lawn mower, this Briggs & Stratton model might be exactly what you need. The 31R977-0054 has 17 and 1/2 horsepower, 500 cc displacement, and a shaft that measures 1 in in diameter by 3 and 5/32 of an inch in length. There are several other Briggs & Stratton models that this can replace on riding mowers from brands like Craftsman, Cub Cadet, and Husqvarna.

[00:00:22]To purchase this engine for your riding mower, give us a call or check it out on our website.