John Deere with a Briggs&Stratton 190cc / 8.75 Engine Series. Product ID:*GXJS45A112988*, Mdl: JS45A, Mfg.031909. 8.75 is torque. I believe it's 6.75 HP. When it gets hot it floods and cuts off. It had to much oil so I drained it. The plug, an RC12YC, is black but not burnt. I could use a manual but this is what iI need for now. 1) What is the correct volume and SAE for the oil? 2) What is the gap for the plug? Thanks, Doug