Mercury 200 OptiMax Jet Drive, Service Manual, Page: 11 / 391

Specifications
Page 1A-6 90-8M0050731 MAY 2011
Powerhead Specifications
Powerhead Specifications
Number of cylinders 6
Displacement 2.5 liter (153 in³)
Stroke 67.3 mm (2.65 in.)
Standard cylinder bore diameter 88.925 mm (3.501 in.)
Cylinder bore maximum taper (service) 0.076 mm (0.003 in.)
Cylinder bore maximum out of round (service) 0.076 mm (0.003 in.)
Oversize cylinder bore diameter ‑ 0.038 mm (0.015 in.) 88.963 mm (3.516 in.)
Cylinder liner type Cast iron
Compression
620–758 kPa (90–110 psi)
1.
Crankshaft
Maximum runout
0.152 mm (0.006 in.)
Piston type Aluminum
Piston skirt standard diameter 88.6968–88.7222 mm (3.492–3.493 in.)
Piston skirt oversize diameter ‑ 0.038 mm (0.015 in.) 88.0778–89.1032 mm (3.507–3.508 in.)
Reed stand open (maximum) 0.51 mm (0.020 in.)
Water pressure
At 900–1000 RPM
1.4–41 kPa (0.2–0.6 psi)
At 5500 RPM (boat on plane) 69–103 kPa (10–15 psi)
Cooling System Specifications
Cooling System Specifications
Water pressure
At 900–1000 RPM
1.4–41 kPa (0.2–0.6 psi)
Temperature sensor
Between black and each tan/black wire
Refer to
Temperature Sensors
Between each lead and ground Refer to
Temperature Sensors
Wear Ring/Impeller Specifications
Wear Ring/Impeller Specifications
Wear ring bore diameter 184.73–184.98 mm (7.273–7.283 in.)
Impeller outside diameter 183.52–183.77 mm (7.225–7.235 in.)
Clearance between wear ring and impeller 0.96–1.47 mm (0.038–0.058 in.)
1. When performing cylinder compression test, place lanyard switch in the "OFF" position to prevent operation of direct injectors or remove fuse
controlling fuel and direct injectors.