7/8" x 1-7/8" Keyed, Shaft is not threaded for a bolt this was designed for a pressure washer so you would have to tap it out if you need it threaded. Pressure Washers & Log Splitters. Various engines with the same shaft size. This engine does not have a blade brake like most push mowers require, It was designed to be used on pressure washers but can be used for other things if you tap the bolt hole out.These were removed from new pressure washers that had a pump defect, Engine may have 1-10 hours runtime on it. Bolt pattern measurements shown in second listing photo. You will receive an engine with a black or red shroud, No choice of color. However both engines are identical other than the color. The item "GCV 160 Honda 5.5hp Over Head Cam Motor 7/8 x 1-7/8 Vertical Shaft Engine" is in sale since Tuesday, July 2, 2019. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Outdoor Power Equipment\Multi Purpose Engines". The seller is "smallenginesforless" and is located in Albany, Indiana. This item can be shipped to United States.