Description
Specification
Model 45C/45IV Model 63A/63
Temperature switch settings ± 5.6° C
(10° F)
Open 87.8° C (190° F)
Closed 110° C (230° F)
Ratios and Part Numbers
The ratio is shown on the identification plate. The ratio may be rounded off in some cases.
ZF Marine Model Ratio Mercury Marine Part Number
45C 1.0:1 864336A03
45IV 1.46:1 Not available
63A
1.5:1 863744T2
2.1:1 863744T3
2.5:1 863744T4
63IV
1.55:1 863745T2
2.0:1 863745T3
2.5:1 863745T4
Fluid Specifications
Listed capacities are approximate. Always use the dipstick to determine the exact fluid level.
Model
Capacity Fluid Type
45IV Reversing unit 2.4 L (2.5 US qt)
Dexron
®
IV Automatic Transmission Fluid
45IV V‑Drive unit 1.0 L (1.0 US qt)
Dexron
®
III Automatic Transmission Fluid
63A 4.5 L (4.75 US qt)
Dexron
®
III Automatic Transmission Fluid
63IV 4.75 L (5.0 US qt)
ZF/45C, 45IV, 63A, 65IV Transmissions
90-8M0099748 eng DECEMBER 2015 © 2016 Mercury Marine Page 9A-3
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