5. If the fluid is below the full mark, add the specified fluid through the dipstick tube. Do not overfill. Install the dipstick with the
cap seated.
45IV
a - Black dipstick
b - Red dipstick
IMPORTANT: For 45IV models, the red dipstick is to be installed in the reversing unit and the black dipstick is to be
installed in the V‑drive unit.
Tube Ref No.
Description Where Used Part No.
28
Dexron III Automatic ZF/45IV transmissions Obtain Locally
Changing
IMPORTANT: Do not start or crank the engine without fluid in the transmission.
Change the transmission fluid when servicing the transmission.
The transmission fluid change and filter service point is located on the bottom side of the transmission toward the engine
flywheel. The transmission has to be raised high enough that the filter service point is accessible.
1. Remove the breather valve, fluid dipstick, and O‑ring.
2. Clean the breather valve, allow it to dry, and coat it with automatic transmission fluid.
Tube Ref No.
Description Where Used Part No.
28
Dexron® III Automatic Breather valve Obtain Locally
ZF/45C, 45IV, 63A, 65IV Transmissions
Page 9A-8 © 2016 Mercury Marine 90-8M0099748 eng DECEMBER 2015
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