Mercury MERCRUISER, Service Manual, Page: 555 / 566

59777
45IV
If factory cables are used, no adjustment should be needed. If other cables are used, then the manufacturer's specifications
should be followed.
IMPORTANT: If not installed correctly, the customer will not be able to shift the transmission completely, or the cable will not be
evenly loaded between forward and reverse, and the neutral position on the transmission will not match the location on the
control box.
Pressure Test
1. Remove the pressure service port plug from port A.
2. Connect a suitable pressure gauge to port A.
3. Disconnect both wires and remove the fluid temperature switch from port B.
4. Install a thermocouple in port B.
Typical ZF Marine transmission
a - Pressure service port plug—port A
b - Fluid temperature switch—port B
5. Operate the boat with a normal load onboard.
6. Ensure that the fluid temperature and shifting pressure are as specified.
Description Specification
Operating temperature 54–79° C (130–175° F)
Shifting pressure
Position A
2150–2350 kPa (312–341 psi) at 2000
RPM
Position B
7. Repair or replace the transmission if measurements are not as specified.
8. Remove the pressure gauge and thermocouple.
9. Apply Loctite 567 PST Pipe Sealant to the fluid temperature switch threads.
8660
a
b
ZF/45C, 45IV, 63A, 65IV Transmissions
90-8M0099748 eng DECEMBER 2015 © 2016 Mercury Marine Page 9A-17