Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 396Get this manual
Backlash and Pinion Depth (Ratcheting and Non-Ratcheting) Pinion Depth All Models 0.025 in(0.635mm) with Tool 91-12349A2 Using Disc and Flat Forward Gear Backlash 1.64:1and 1.75:1 Gear Ratios 1.62: Gear Ratio Service Replacement 0.017 into 0.018 in(0.431 mm to 0.457mm) Pointer on line mark #1 with Backlash Indicator Rod 91-53549 0.040 into 0.060 in(1.01 mm to 1.52mm)
Gear Ratio
Teeth in Pinion Gear 13 17 12 15 Water Pressure
Teeth in Forward and Reverse Gear 21 28 21 28
1.62:1 1.64:1 1.75:1 1.87:1
Idle W.O.T12 Diax 15 Pitch
1-124-12 PSI
8-10 PSI Test Propeller for Static Test 48-78116A40