60
12.3
0.2
18
76
030 is 30, which is a number in the decimal system.
18 divided 20 = 0.9
18 divided to 4266 = 0.004219409282700422
18 divided 27 = 0.6666666666666666
18
The 1957 model, 18 hp Johnson outboard, requires an Champion J4C, or NGK B8S, gapped to .030 in.
18
0.5625