60R/61VR/65VR Disc Valve Pin Replacement - OS26816108 by O.S. Engine  [OS26816108]

Disc valve pin for O.S. Engine 60R, 61VR and 65VR

This disc valve pin is a carburettor replacement part made to restore correct disc valve alignment on O.S. Engine models 60R, 61VR and 65VR. It locates the disc valve inside the carburettor so the valve opens and closes consistently during throttle transitions, helping to keep fuel flow and throttle response stable in model engines.

Compatibility is restricted to the engine codes listed above, so check your engine casting or service manual before ordering to ensure the part suits your carburettor layout. The pin is supplied as a service replacement for routine engine maintenance and tuning; it is not intended as a standalone performance upgrade but as a functional item that keeps valve action stable.

Fitting advice and practical tips:

• Remove the carb top and diaphragm plate following the engine service instructions, and keep all parts free of dirt and grit.
• Extract the old pin, move any small seals or bushings across if they are reusable, then fit the new pin making sure the disc valve moves freely without binding.
• Once reassembled, test idle and throttle transitions on a stand or bench before running at full throttle to confirm correct valve seating and timing.