Briggs & Stratton 191707
Blake,
JD made a change on the 108 a couple of times. The first year, 1979, it had a mechanical pto clutch, then in 1980 till it's final year in 1985, it had an electrical pto clutch. In 1982, Deere moved the fuel tank from under the hood to underneath the fender deck. You can repower this with other engines, but if yours had the fuel tank under the hood, it may limit to what engines you can use. We had a member here years ago who repowered an under the hood fuel tank 111 with a bigger engine and shimmed up the fuel tank with wooden blocks.