🏷️ Basic Information Identification Make: Mercury Mercruiser Product Type: Workshop Service Repair Manual Product Name: Mercury Mercruiser Marine Engines Number 6 Stern Drive Units R, MR, Alpha One, Alpha One SS Workshop Service Repair Manual Download PDF Product Description: This manual provides detailed instructions for servicing and repairing Mercury Mercruiser Marine Engines Number 6 Stern Drive Units R, MR, Alpha One, Alpha One SS. It is aimed at DIY enthusiasts to save on service and maintenance costs. Coverage Models Covered Transom Assemblies: • {'model': 'MC 120R/140B/185R/488R/898R/228R/260R', 'serial_number_range': '6216687 - 6849289'} • {'model': 'MC 120MR/140MR/170MR/185MR/190MR/200MR/230MR/260MR/300 Tempest MR', 'serial_number_range': '6849290 - 0A471374'} • {'model': 'MC Alpha One/Alpha One SS', 'serial_number_range': '0A471375 and Above'} Models Covered Sterndrive Units: • {'engine_series': 'MC 120R-260R', 'gear_ratios': [{'original': '1.98:1', 'if_serviced_with_13:21': '1.94:1', 'serial_number_range': '6237861-6854392'}, {'original': '1.84:1', 'if_serviced_with_13:21': '1.81:1', 'serial_number_range': '6225577-6862701'}, {'original': '1.65:1', 'if_serviced_with_13:21': '1.62:1', 'serial_number_range': '6268065-6810537'}, {'original': '1.50:1', 'if_serviced_with_13:21': '1.47:1', 'serial_number_range': '6229158-6847029'}, {'original': '1.32:1', 'if_serviced_with_13:21': '1.29:1', 'serial_number_range': '6231571-6663947'}]} • {'engine_series': 'MC 120 MR - 300 TEMPEST MR', 'gear_ratios': [{'original': '1.98:1', 'if_serviced_with_13:28': '1.94:1', 'serial_number_range': '6854393-0A476746'}, {'original': '1.84:1', 'if_serviced_with_13:28': '1.81:1', 'serial_number_range': '6862702-0A470164'}, {'original': '1.65:1', 'if_serviced_with_13:28': '1.62:1', 'serial_number_range': '6810538-0A475786'}, {'original': '1.50:1', 'if_serviced_with_13:28': '1.47:1', 'serial_number_range': '6847030-0A479506'}]} • {'engine_series': 'MC ALPHA ONE / ALPHA ONE SS', 'gear_ratios': [{'original': '1.98:1', 'if_serviced_with_13:28': '1.98:1', 'serial_number_range_rh': '0A476747 and Above', 'serial_number_range_lh': '0C881740 and Above'}, {'original': '1.84:1', 'if_serviced_with_13:28': '1.84:1', 'serial_number_range_rh': '0A470165 and Above', 'serial_number_range_lh': '0C884040 and Above'}, {'original': '1.65:1', 'if_serviced_with_13:28': '1.65:1', 'serial_number_range_rh': '0A475787 and Above', 'serial_number_range_lh': '0C881790 and Above'}, {'original': '1.50:1', 'if_serviced_with_13:28': '1.50:1', 'serial_number_range_rh': '0A479507 and Above', 'serial_number_range_lh': '0C852908 and Above'}, {'original': '1.32:1', 'if_serviced_with_13:28': '1.32:1', 'serial_number_range_rh': '0A613927 and Above'}, {'model_variant': 'Alpha One SS', 'gear_ratios': ['1.50/1.32:1'], 'serial_number_range': '0A545004 and Above'}]} • {'application': 'Sea Ray Sterndrive Units and Transom Assembly (Oyster White)', 'gear_ratios': [{'original': '1.98:1', 'if_serviced_with_13:21': None, 'serial_number_range': '0B803866-0C348031'}, {'original': '1.84:1', 'if_serviced_with_13:21': None, 'serial_number_range': '0B800854-0C343526'}, {'original': '1.50:1', 'if_serviced_with_13:21': None, 'serial_number_range': '0B796473-0C340666'}, {'original': '1.32:1', 'if_serviced_with_13:21': None, 'serial_number_range': '0B804807-0C340030'}], 'transom_assembly_serial_range': '0B815811-0C340333'} Sea Ray Cross Reference: • {'sea_ray_engine': '3.0L', 'mercruiser_equivalent': '3.0L Alpha One'} • {'sea_ray_engine': '4.3L2', 'mercruiser_equivalent': '4.3L Alpha One'} • {'sea_ray_engine': '4.3L4', 'mercruiser_equivalent': '4.3LX Alpha One'} • {'sea_ray_engine': '5.7L', 'mercruiser_equivalent': '5.7L Alpha One'} • {'sea_ray_engine': 'SRX 5.7L', 'mercruiser_equivalent': '350 Magnum Alpha One'} • {'sea_ray_engine': 'SRX 7.4L', 'mercruiser_equivalent': '454 Magnum Alpha One'} Target Audience Ideal User: Do-It-Yourselfer (DIY) 📋 Manual Details Format File Format: PDF Delivery Method: Instant Download Printable: True Language Language: English Compatibility Os Compatibility: All Versions of Windows & Mac Device Compatibility: APP ISO, iPhone, iPod, Android etc. Requirements Software Requirements: Adobe PDF Reader Content Manual Structure: • Section 1: Important Information (A - Important Information, B - Maintenance, C - Troubleshooting) • Section 2: Removal, Installation and Adjustments (A - All Models) • Section 3: Sterndrive Unit (A - Drive Shaft Housing, B - Gear Housing - MR/Alpha One/Alpha One SS, C - Gear Housing - I-R, D - Gear Housing - Alpha One Counter Rotation) • Section 4: Transom Assembly (A - Service Procedures Requiring Minor Disassembly, B - Service Procedures Requiring Major Disassembly) • Section 5: Power Trim (A - Oildyne Power Trim Pump (Plastic Reservoir), B - Oildyne Power Trim Pump (Aluminum Reservoir), C - Prestolite Power Trim Pump, D - Trim Cylinders, E - Dual Power Trim Control, F - Auto Trim II) • Section 6: Steering Systems (A - Power Steering, B - Manual Steering) • Section 7: Corrosion Protection (A - All Models) Covered Topics: • General Information • Removal-Installation Alignment • Electrical System • Fuel System • Engine • Drive systems • Accessories • Specifications • Tools Purpose Primary Purpose: Service and repair of Mercury Mercruiser stern drive units and transom assemblies. Features Diagrams Quality: High quality diagrams Cost Saving Benefit: Saving $$$$$$ in service repair and maintenance costs Payment Options Accepted Payment Methods: • All major credit/debit cards • PayPal ⚙️ Engine Specifications General Engine Type: Marine Stern Drive Engines Engine Series: Number 6 (R, MR, Alpha One, Alpha One SS) Power Power Output Range: Varies by specific engine model (e.g., 120R, 140B, 185R, 488R, 898R, 228R, 260R, 120MR, 140MR, 170MR, 185MR, 190MR, 200MR, 230MR, 260MR, 300 Tempest MR) Displacement Displacement Examples: 3.0L, 4.3L, 5.7L, 7.4L (from Sea Ray cross-reference) 🔧 Transmission Sterndrive Gear Ratios Available Ratios: • 1.98:1 • 1.94:1 • 1.84:1 • 1.81:1 • 1.65:1 • 1.62:1 • 1.50:1 • 1.47:1 • 1.32:1 • 1.29:1 Drive Type Drive System: Stern Drive (Number 6, R, MR, Alpha One, Alpha One SS) 📐 Dimensions General Dimensions: Not specified in the product description, but the manual covers detailed component dimensions and assemblies. Weight Weight: Not specified in the product description, but the manual covers weight specifications for components. 🔧 Maintenance General Maintenance Procedures: The manual covers maintenance procedures within Section 1B. Troubleshooting Troubleshooting Guide: Included in Section 1C. Corrosion Protection Corrosion Protection Procedures: Covered in Section 7A. Service Interval Service Intervals: Not explicitly stated in the product description, but typical for this type of manual. Oil Capacity Oil Capacity: Not explicitly stated in...