This a small gas model engine, it dose not have hit and miss linkage, it appears that it has run in the past I have not run it. I believe it was built from popular mechanics "midget gas engine plans" , many moons ago. It turns free and has good compression, point plate appears to be from lucas motorcycle magneto as used on a matchless.
The item "Hit and miss gas engine model" is in sale since Sunday, February 19, 2017. This item is in the category "Business & Industrial\Light Equipment & Tools\Stationary Engines\Parts". The seller is "28speedster" and is located in Cottage Grove, Oregon. This item can be shipped to United States, to Canada, to United Kingdom, DK, RO, SK, BG, CZ, FI, HU, LV, LT, MT, EE, to Australia, GR, PT, CY, SI, to Japan, to China, SE, KR, ID, to Taiwan, TH, to Belgium, to France, to Hong Kong, to Ireland, to Netherlands, PL, to Spain, to Italy, to Germany, to Austria, IL, to Mexico, to New Zealand, SG, to Switzerland, NO, SA, UA, AE, QA, KW, BH, HR, MY, CL, CO, CR, DO, PA, TT, GT, SV, HN, JM.