This is a Flywheel Nut for the OS Max .21XM Out-Board Engine.
This Nut Goes Inside the Flywheel (Starter Cone) On the Crankshaft.
INCLUDES: One stainless steel 1/4-28 Acorn Nut (Flywheel Nut)
COMMENTS: This Nut Will Also fit the .61SF-HS Engine.
Nut has reverse threads.
ir/jl
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