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AQ-275 AQ-275A
Please Check with your parts diagram or ask me for ultimate compatibility
540-7238A2 Crankshaft Main Bearing Assembly Valve Type 34-56007A1 Reed Set found on this item
Various Retainers as pictured
Generally found on some 1994-2006 Mercury & Mariner 80hp Jet / 100hp (4cyl) / 115hp (4cyl) / Mercury 125 (4cyl) Outboards
Volvo Penta 3850935 3855695 Cobra SX Lower Unit Gearcase 1.66 1.97 4.3L V6 SX-M Piston Sets AQ-275 AQ-275APart Number(s) Included Volvo Penta OMC Joint Venture 3850935 3855695 Cobra SX Sterndrive Upper Gearcase Unit From a 4. 3L GL 1994 Model 17 27 Teeth For the Lower Gears (1. 66 & 1. 97 Ratios) General Application Compatibility So 1. 66 was stamped on the plate from the upper unit, but basically the uppers only came in 2 flavors and the lowers came in 5 flavors, 1. 66 reflected the "overall" ratio after combining the upper & lower, hopefully this guide