O.S. Engine OS27981710 Carburettor Retainer 60B Mounting and Alignment Part  [OS27981710]

How the Retainer Supports Tuning

The O.S. Engine OS27981710 carburettor retainer 60B is a small but important accessory that secures the carburettor inside the engine assembly. It provides a mounting point and positioning control so the carburettor remains aligned with the intake tract and throttle linkage while making adjustments or running the engine.

Please fit this retainer when renewing worn mounting hardware or after reassembly. Installation is typically simple: position the retainer to seat the carburettor against the intake flange, align any throttle linkage and attachment points, then tighten the fasteners evenly to keep alignment. Fasteners should be snug; avoid over-tightening to protect threads and housing.

Keeping the retainer in good condition helps ensure needle settings and throttle response stay consistent across runs. Include the retainer in routine inspections and replace it if it shows distortion, cracks, or a degraded fit that could change carburettor seating.