Marine Engine (Outboard)

FORCE (U.S. MARINE)

2HP

Model Year Standard Plug Gap (mm)
1996-98 W22FS-U/TR22 0.9

3HP

Model Year Standard Plug Gap (mm)
1990-94 W20FP-U10 1.0

4HP

Model Year Standard Plug Gap (mm)
1984-87 W20FS-U/TR20 0.8

5HP

Model Year Standard Plug Gap (mm)
1988-98 W20FP-U 0.9

7.5HP

Model Year Standard Plug Gap (mm)
1985 W20FS-U/TR20 0.8

9.9HP

Model Year Standard Plug Gap (mm)
1984-98 W20FS-U/TR20 0.8

15HP

Model Year Standard Plug Gap (mm)
1984-98 W20FS-U/TR20 0.8

25HP

Model Year Standard Plug Gap (mm)
1996-98 W20FS-U/TR20 0.8

35HP

Model Year Standard Plug Gap (mm)
1986-91 W20FS-U/TR20 0.8

40HP

Model Year Standard Plug Gap (mm)
1992-98 W20FSR 0.9

50HP

Model Year Standard Plug Gap (mm)
1984-87 W22FS-U/TR22 0.8

50HP Thunderbolt Ign.

Model Year Standard Plug Gap (mm)
1991-98 SF50 0.0

50HP Prestolite

Model Year Standard Plug Gap (mm)
1998-91 SF10 0.0

60HP

Model Year Standard Plug Gap (mm)
1985 SF50 0.0

70HP Thunderbolt Ign.

Model Year Standard Plug Gap (mm)
1991-95 SF50 0.0

75HP

Model Year Standard Plug Gap (mm)
1996-98 SF50 0.0

85HP

Model Year Standard Plug Gap (mm)
1983-89 SF10 0.0

90HP Thunderbolt Ign.

Model Year Standard Plug Gap (mm)
1991-98 SF50 0.0

90HP Prestolite Ign.

Model Year Standard Plug Gap (mm)
1990-91 SF10 0.0

120HP Thunderbolt Ign.

Model Year Standard Plug Gap (mm)
1991-98 SF50 0.0

120HP Prestolite Ign.

Model Year Standard Plug Gap (mm)
1990-91 SF10 0.0

125HP

Model Year Standard Plug Gap (mm)
1983-89 SF10 0.0

150HP Thunderbolt Ign.

Model Year Standard Plug Gap (mm)
1991-94 SF50 0.0

150HP Prestolite

Model Year Standard Plug Gap (mm)
1989-91 SF10 0.0

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