ORIGINAL
FACTORY PARTS
Part
Number 11-8921 11-8923 11-8924
Marine Cylinder Heads for K&B 3.5's 3-7-2019
Marine Cylinder Heads for K&B 3.5's 3-7-2019
11-8924 3.5 head button Short
Plug
The outside dia is .120 tall
11-8921 3.5 head button Long
Plug
The outside dia is .220 tall
11-8923 3.5 Air Cooled outboard
Uses long reach glo plug
As for the direction of the notches...
normally 5 toward the intake but customers claim
the 3 toward the intake work too. Experiment for yourself.
Items usually purchased with this
Head Shim Set
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