It features our unique Overhead Valve (OHV) technology along with a simple-to-maintain design, creating a more durable, longer lasting engine. This engine is designed to meet basic riding mower needs. Try our 344cc 10.5 Gross HP Power Built engine 1-inch diameter by 3-5/32-inch length crankshaft, keyway, tapped 7/16-20. One new Briggs complete replacement engine for many Briggs & Stratton engine applications. I'LL DO ALL I CAN TO FIND YOU WHAT YOU'D LIKE TO SEE LISTED!! 'I pride myself with the Customer Service we Provide!'ĪNY QUESTIONS? CHECK OUT MY STORE OR CALL RANDY OR KRISTAL DUNCAN AT 93.