Mercury 75 Service Manual

90-830234R3 DECEMBER 1997 LOWER UNIT - 6A-1
Specifications
MODEL 75/90
Gear Ratio
Gearcase Capacity
Lubricant Type
Forward Gear
Number of Teeth
Pinion Gear
Number of Teeth
Pinion Height
Forward Gear Backlash
Water Pressure
@ 750 RPM (Idle)
@ 6000 RPM (WOT)
2.3:1
22.5 fl. oz. (655ml)
Quicksilver Gear Lube-Premium Blend
30 Spiral/Bevel
13 Spiral/Bevel
0.025 in. (0.64mm)
Pinion Gear Locating Tool
(91-12349A2)
Flat #8
Disc #3
0.012-0.019 in. (0.30-0.48mm)
Backlash Indicator Tool (91-78473)
Mark #4
2.0-4.0 psi (14-28 kPa)
10.0-15.0 psi (69-103 kPa)
MODEL 100/115/125
Gear Ratio
Gearcase Capacity
Lubricant Type
Forward Gear
Number of Teeth
Pinion Gear
Number of Teeth
Pinion Height
Forward Gear Backlash
Water Pressure
@ 750 RPM (Idle)
@ 6000 RPM (WOT)
2.07:1
22.5 fl. oz. (655ml)
Quicksilver Gear Lube-Premium Blend
29 Spiral/Bevel
14 Spiral/Bevel
0.025 in. (0.64mm)
Pinion Gear Locating Tool
(91-12349A2)
Flat #8
Disc #3
0.015-0.022 in. (0.38-0.55mm)
Backlash Indicator Tool (91-19660--1)
Mark #1
2.0-4.0 psi (14-28 kPa)
10.0-15.0 psi (69-103 kPa)
75/90/100/115/125 Prop Shaft Runout (Maximum) 0.009 in. (0.23mm)

Mercury 75 Specifications

General

Horsepower	75 hp
Starting	Electric
Cylinders	3
Warranty	3 years
Shaft Length	20 in. or 25 in.