Mercury 15 EFI FourStroke, Service Manual

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c. Push the lower shift shaft down to the reverse stop.
a - Coupler on upper shift shaft
b - Lower shift shaft in reverse (full down)
c - Jam nut all of the way down
d. Press the shift linkage aft to rotate the outboard’s horizontal shift shaft to the full reverse stop.
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e. Maintain alignment of the upper and lower shift shafts while threading the coupler at least five turns onto the lower
shift shaft.
IMPORTANT: Take care to not rotate the lower shift shaft. Doing so will damage the gearcase.
f. Use two wrenches to lock the jam nut against the coupler.
a - Upper vertical shift shaft
b - Wrench on coupler
c - Wrench on jam nut
5. Use a flat‑blade screwdriver or other suitable tool to ensure that the detent springs are fully seated in the reverse detent.
Tighten the shift detent screw to the specified torque.
Description Nm lb‑in. lb‑ft
Shift detent screw 6.0 53.1 –
a
b
c
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a
c
b
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Tiller Handle
90-8M0125265 eng NOVEMBER 2017 © 2018 Mercury Marine Page 7B-19