The No.15 universal nipple made by O.S. Engine acts as the connection point between a carburettor outlet and the fuel hose used on glow engines. Designed for routine replacement, it helps maintain a sealed fuel pathway on model engines.
Replacement usually requires removing the old fitting, checking the carburettor outlet for contamination, and seating the new nipple according to the carburettor's retention method. Some outlets accept a press fit while others need a clip or clamp for secure retention.
Keeping the nipple and associated tubing in good condition reduces the chance of fuel leaks and supports reliable idle and throttle performance. Inspect the assembly periodically as part of standard engine care.
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