Check the rating plate of your unit for the orifice size requirement or match the S1-9951-0981 part number against your model's technical service manual

In high-performance boiler environments

It is standard practice to inspect existing bolts for thread fatigue and replace them with high-grade fasteners if necessary during the install

Perform a continuity test with a multimeter across the terminals

ensuring perfect alignment with the nozzle centerline

Browning SK 2 1/8 Bushing 321894-708 Check the rating plate ofThe Browning SK 2 1 8 is a high performance Quick Detachable (Q D) bushing engineered for heavy duty power transmission applications. Built from high grade malleable iron, this split taper bushing features a precision machined 2 1 8" bore and a standard 1 2" x 1 4" keyseat to ensure a secure, slip free interface between the shaft and the drive component. The fully split design allows for a true interference fit on undersized shafts, effectively