I am a researcher at a museum and I have been asked to help identify an unknown marine engine. I would appreciate any readers help with regards to this engine. Some specifications are: Base 271⁄4” x 191⁄4”; Flywheel 163/8” [make fractions] diameter x 4”, Face 11/2” and 15/8” Recesses; Piston 77/8” long; Big End diameter 49mm; Crankshaft 27” long x 13⁄4” diameter; Bore 5” x Stroke 5”; and a 2-stroke engine. I am contactable via email at anne.doran@sea.museum. I look forward to hearing from you.