Engine Specifications Quick Box Model / Series: 15R74M Fuel Mix Ratio: 50:1 Spark Plug: Champion L77JC4 Plug Gap: 0.030 in Ignition Type: Low Tension Magneto Point Gap: 0.020 in Direct Replacement Part Numbers Use these cross-reference numbers to order replacement components: Carburetor Rebuild Kit: Sierra 18-7010 (OEM 398532) Water Pump Impeller: Sierra 18-3059 (OEM 395289)…