O.S. Needle Valve Holder Assembly #61B 91HZTower Stock# OSMG7111 • Manufacturer Stock# 29085940
Notes from our tech department:
O.S. Engines 61B Carburetor (OSMG3751) used on the 91HZ.
Threads into carburetor body and holds high-range needle in place
One Needle Valve Holder
Installing in carburetor body and attaching high-range needle