SKU: AD-USED-56-SPOOL
HILBORN -KINSLER 61 Spool- Largest Spool for over 550 cu in unblown REPLACES 56

FOUND 3 USED   56 SPOOLS ---  LAST OF THEM    THEN   YOU CAN USE A 61    

BEFORE HILBORN SOLD US THEIR PARTS - THEY HAD ALREADY CHANGED THEIR 56  SPOOL TO A 61      WE HAVE 3 USED 56  AND THEN ALL OF THEM WILL BE A 61  

This fits all Hilborn barrel (metering) valves that accept a 23-54-56-77-58  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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