Popping, tapping, and clunking are three unhealthy noises you do not want to hear from your model airplane's RC motor while flying your favorite hobby toy around the back yard. Solve your motor woes by replacing your current unit with a fresh four-stroke RC engine available within the large inventory on eBay. Opt for a replacement Magnum four-stroke to bring the life back to your biplane or use a Thunder Tiger unit equipped with a muffler for your RC helicopter. View a selection of high-quality Saito four-stroke RC engines to give your model aircraft a powerful kick. Go for a vintage Vega model to stay true to your classic plane's original design. Select a range of spare parts for your repair kit, including rocker arms, bolts, and tools to ensure your project goes as planned. Install your engine in an existing plane or use it to construct a replica of your favorite aircraft from scratch — the possibilities are endless. So, replace your sputtering motor with a shiny replacement four-stroke RC engine and take to the air.