New Drive Shaft Socket Wrench Adapter Compatible With Mercruiser Bravo I Ii Alpha One Gen Ii Mc-I

MERCRUISER STERNDRIVE APPLICATIONS:

ALPHA SERIES STERNDRIVES:
• MerCruiser MC-I (Original MerCruiser Sterndrive)
• MerCruiser R-MR (R and MR Series Sterndrives)
• MerCruiser Alpha One (Original Alpha Platform)
• MerCruiser Alpha One Gen II (Revised Alpha Platform)

BRAVO SERIES STERNDRIVES:
• MerCruiser Bravo One (Bravo I Sterndrive)
• MerCruiser Bravo II (Bravo II Sterndrive)

TRS DRIVE UNITS:
• MerCruiser TRS (Transom Ratio Stern Drive)

PRIMARY FUNCTION:
• Slides over the driveshaft to provide wrench surface
• Enables removing/torquing of the pinion gear nut
• Critical for sterndrive lower unit rebuild procedures
• Provides mechanical advantage for stuck pinion nuts
• Works with standard socket wrenches and torque wrenches

SECONDARY FUNCTION:
• Turns vertical drive shaft on Bravo I & II outdrives
• Allows rotation for bearing inspection and preload check
• Used on propeller shaft service (Alpha, Bravo, TRS)
• Essential for backlash and preload adjustments

USE CASE SCENARIOS:
• Sterndrive lower unit rebuild
• Pinion gear removal and replacement
• Propeller shaft bearing replacement
• Gear preload and backlash adjustment
• Saltwater corrosion rebuild work

TOOL SPECIFICATIONS:
• Type: Drive Shaft Socket / Adapter Service Tool
• Material: Nickel-Plated Steel (Corrosion Resistant)
• Construction: Professional Grade Service Tool
• Compatible: Alpha, Bravo I/II, MC-I, R-MR, TRS Sterndrives
• Function: Pinion Nut Service AND Driveshaft Rotation
• Condition: New

OEM PART NUMBERS:
• Mercury/Quicksilver: 91-61077
• Mercury/Quicksilver: 91-61077T (tool variant designation)
• MPN: 90230

COMPANION SERVICE TOOLS (not included):
• Alpha 1 Drive Shaft Adapter (OEM 91-56775T) — Alpha One only
• Bearing Retainer Tool Bravo III (OEM 91-805382T) — Bravo III only
• Bravo II Prop Nut Socket (OEM 805457-1)
• Drive Shaft Bearing Retainer Wrench (OEM 91-43506T)

CRITICAL FITMENT WARNINGS:
• STERNDRIVE-ONLY tool — does NOT fit outboard motors
• Does NOT fit Mercury outboard motors (this is for sterndrives only)
• Does NOT fit Bravo III sterndrives (uses different bearing retainer)
• Does NOT fit Volvo Penta, OMC Cobra, or other sterndrive brands
• Does NOT fit Mariner outboard motors (outboard-only brand)
• Professional service tool — knowledge of MerCruiser sterndrive service recommended