Fairbanks Morse T Vertical Hit Miss. Mounts to head with 4 bolts 3 3/4 apart on center. 2 15/16 center to center igniter mounting holes. Mounts to base with 4 holes spaced 4 5/16 apart on center. 4″ diameter bore and 1 1/2″ diameter for crankshaft. 1/2 water inlet threads. There is a chip in the rim around the threads for the water inlet. No breaks, cracks or welds to the cylinder. Be sure to add me to your favorites list. Be sure to check out my website for other engines and engine related items / gasenginetom. Please feel free to call me with questions. My parts inventory has grown out of control, so set a reminder to check back frequently for new listings! If you decide you don’t want it or find another one cheaper, I won’t take it back. For example, if my measurements are wrong, I would take it back. Most of my parts are listed “AS IS” and are in unknown working condition, unless otherwise stated. I do my best to point out any flaws in the description so be sure to read it and review the pictures.