Replacement SS-10.5 O-Ring OS29701310 for RC Engine Seals by O.S. Engine  [OS29701310]

What this O-ring does

This item from O.S. Engine, model OS29701310 with SS-10.5 GT55 marking, is a service O-ring used to seal engine joints and help prevent the escape of fuel or lubricant in model engines. It is intended for routine maintenance use.

Basic fitting guidance: ensure mating parts are clean and undamaged, seat the O-ring gently without undue stretching, and perform a static leak check before running the engine. Steer clear of solvents that can compromise the elastomer, and store the part protected from direct light and heat.

During tuning or overhaul, consider the O-ring a consumable item: inspect it on disassembly, replace if you detect cracks or loss of elasticity, and keep spares to avoid service interruptions. Always confirm the groove dimensions match when selecting replacements.