A generator set is disclosed. The generator set includes an engine and a flywheel coupled to the engine. The generator set further includes a generator having a housing and a hub portion configured to receive power from the engine. The generator set further includes a coupling member coupled to the flywheel and the hub portion within the housing of the generator. The coupling member includes an outer ring member disposed adjacent to the flywheel. The coupling member further includes an inner ring member disposed within the outer ring member. The coupling member further includes a plurality of blocks disposed within each of plurality of slots. The coupling member is disposed at an axial distance from an inner face of the housing. The housing of the generator includes one or more access openings to access the coupling member from outside the housing.