SKU: AD-BV61
Hilborn #61 Rotator Spool- Largest Spool that fits in the Barrel valve that a 54 and 56 fits in -

#61 spool  takes the place of a #56 spool 

This fits all Hilborn barrel (metering) valves that accept a 23-54-56-77 spool



Has sharp idle ramp for engines when using a small amount of nitro or a very large 575-700 cu in Alky engine

Provides for more fuel in first 30 degrees of spool rotation.
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