YS Engine YSS7146 Seal Ring Set for 61ST-H Engines  [YSS7146]

Replacement seals matched to 61ST-H

This seal set from YS Engine carries the model code YSS7146 and corresponds to the 61ST-H designation. It is supplied to refurbish sealing faces on compatible 61ST-H engine assemblies used in radio-controlled vehicles.

Use the kit when performing maintenance or engine overhaul to replace perished O-rings. Fresh seals help prevent fuel seepage and maintain correct internal pressures during operation, improving reliability between services. Always confirm your engine shows the 61ST-H reference prior to purchase.

Fitting the rings is a standard maintenance operation for modellers familiar with engine strip-down: thoroughly clean the grooves, lightly lubricate new rings to avoid distortion, and perform staged reassembly checks. This set supports upkeep and tuning routines rather than delivering standalone performance enhancements.