O.S. Engine OS27981850 O-Ring Set 60B — Engine Seal Kit for RC Glow and Gas Engines  [OS27981850]

Engine sealing O-ring kit

This O.S. Engine O-Ring Set 60B provides replacement sealing rings designed for model engine upkeep and on-track service. The pack covers common sealing points around fuel and pressure joints, making it a useful spare set to carry for routine maintenance of hobby glow and small gas engines.

Fitting is simple: clean the mating surfaces, seat each o-ring without twisting, and align parts before final assembly. A light coating of suitable lubricant on the o-ring or bore can ease installation and reduce the risk of pinching, but avoid solvents or aggressive chemicals that could damage the seal.

From a maintenance and tuning viewpoint, installing fresh o-rings helps retain consistent compression and reduces small leaks that can upset idle stability and throttle response. Keep a set in your field kit for quick swaps to limit downtime and maintain predictable engine behavior.