Made by Continental. Graymarine Service Manual. Covers engines from 1939 thru 1958. My 1968 Bristol 32 has a Graymarine Sea Scout 91, 25 ph, gas engine. Runs like a top! If anyone needs help finding parts, just ask. https://drive.google.com/open?id=1MrI3tCg1uWM5Ynfby0yWiHVRbiEUjZOw