🏷️ Basic Information Identification Manufacturer: MerCruiser Product Category: Stern Drive Units and Transom Assemblies 📋 Manual Details Document Properties Manual Type: Service Repair Manual Language: English Page Count: 566 Format: PDF Features: • Bookmarks • Searchable Text • Improved Quality • Indexed • Table of Contents Compatibility Compatible Os: • Windows • Mac Content Sections Sections Included: • Important Information (Information, Maintenance, Troubleshooting) • Removal, Installation and Adjustments (All Models) • Stern Drive Unit (Drive Shaft Housing, Gear Housing - MR / Alpha One / Alpha One SS, Gear Housing - I-R, Gear Housing - Alpha One Counter Rotation) • Transom Assembly (Service Procedures Requiring Minor Disassembly, Service Procedures Requiring Major Disassembly) • Power Trim (Oildyne Power Trim Pump (Plastic Reservoir), Oildyne Power Trim Pump (Aluminum Reservoir), Prestolite Power Trim Pump, Trim Cylinders, Dual Power Trim Control, Auto Trim II) • Steering Systems (Power Steering, Manual Steering) • Corrosion Protection (All Models) 🔧 Maintenance Maintenance Tasks Covered Maintenance Areas: • Tune-ups • Regular Maintenance • Repairs 📄 Specifications Device Type Device Type: Marine Stern Drive and Transom Assembly Intended Use Intended Use: Maintenance and Service Coverage Models Covered: • MerCruiser R • MerCruiser MR • MerCruiser Alpha One • MerCruiser Alpha One SS • MerCruiser #6 (06) Transom Assembly Models: • MC 120R / 140B / 185R / 488R / 898R / 228R / 260R (Serial Numbers 6216687 - 6849289) • MC 120MR / 140MR / 170MR / 185MR / 190MR / 200MR / 230MR / 260MR / 300 Tempest MR (Serial Numbers 6849290 - 0A471374) • MC Alpha One / Alpha One SS (Serial Number 0A471375 and Above) Sterndrive Ratios Mc 120R 260R Sterndrive Ratios: • {'model': 'MC 120R-260R', 'original_ratio': '1.98:1', 'ratio_if_serviced_with_13:21': '1.94:1', 'gears_serial_number_range': '6237861-6854392'} • {'model': 'MC 120R-260R', 'original_ratio': '1.84:1', 'ratio_if_serviced_with_13:21': '1.81:1', 'gears_serial_number_range': '6225577-6862701'} • {'model': 'MC 120R-260R', 'original_ratio': '1.65:1', 'ratio_if_serviced_with_13:21': '1.62:1', 'gears_serial_number_range': '6268065-6810537'} • {'model': 'MC 120R-260R', 'original_ratio': '1.50:1', 'ratio_if_serviced_with_13:21': '1.47:1', 'gears_serial_number_range': '6229158-6847029'} • {'model': 'MC 120R-260R', 'original_ratio': '1.32:1', 'ratio_if_serviced_with_13:21': '1.29:1', 'gears_serial_number_range': '6231571-6663947'} Sterndrive Ratios Mc 120Mr 300 Tempest Mr Sterndrive Ratios: • {'model': 'MC 120 MR - 300 TEMPEST MR', 'original_ratio': '1.98:1', 'ratio_if_serviced_with_13:28': '1.94:1', 'gears_serial_number_range': '6854393-0A476746'} • {'model': 'MC 120 MR - 300 TEMPEST MR', 'original_ratio': '1.84:1', 'ratio_if_serviced_with_13:28': '1.81:1', 'gears_serial_number_range': '6862702-0A470164'} • {'model': 'MC 120 MR - 300 TEMPEST MR', 'original_ratio': '1.65:1', 'ratio_if_serviced_with_13:28': '1.62:1', 'gears_serial_number_range': '6810538-0A475786'} • {'model': 'MC 120 MR - 300 TEMPEST MR', 'original_ratio': '1.50:1', 'ratio_if_serviced_with_13:28': '1.47:1', 'gears_serial_number_range': '6847030-0A479506'} Sterndrive Ratios Mc Alpha One Alpha One Ss Sterndrive Ratios: • {'model': 'MC ALPHA ONE / ALPHA ONE SS', 'original_ratio': '1.98:1', 'ratio_if_serviced_with_13:28': '1.98:1', 'gears_serial_number_rh': '0A476747 and Above', 'gears_serial_number_lh': '0C881740 and Above'} • {'model': 'MC ALPHA ONE / ALPHA ONE SS', 'original_ratio': '1.84:1', 'ratio_if_serviced_with_13:28': '1.84:1', 'gears_serial_number_rh': '0A470165 and Above', 'gears_serial_number_lh': '0C884040 and Above'} • {'model': 'MC ALPHA ONE / ALPHA ONE SS', 'original_ratio': '1.65:1', 'ratio_if_serviced_with_13:28': '1.65:1', 'gears_serial_number_rh': '0A475787 and Above', 'gears_serial_number_lh': '0C881790 and Above'} • {'model': 'MC ALPHA ONE / ALPHA ONE SS', 'original_ratio': '1.50:1', 'ratio_if_serviced_with_13:28': '1.50:1', 'gears_serial_number_rh': '0A479507 and Above', 'gears_serial_number_lh': '0C852908 and Above'} • {'model': 'MC ALPHA ONE / ALPHA ONE SS', 'original_ratio': '1.32:1', 'ratio_if_serviced_with_13:28': '1.32:1', 'gears_serial_number_rh': '0A613927 and Above', 'gears_serial_number_lh': None} • {'model': 'Alpha One SS', 'original_ratio': '1.50:1', 'ratio_if_serviced_with_13:28': '1.50:1', 'gears_serial_number_rh': '0A545004 and Above', 'gears_serial_number_lh': None} • {'model': 'Alpha One SS', 'original_ratio': '1.32:1', 'ratio_if_serviced_with_13:28': '1.32:1', 'gears_serial_number_rh': '0A545004 and Above', 'gears_serial_number_lh': None} Sea Ray Sterndrive Units Transom Assembly Oyster White Sea Ray Sterndrive Ratios: • {'model': 'Sea Ray (Oyster White) Sterndrive', 'original_ratio': '1.98:1', 'ratio_if_serviced_with_13:21': None, 'gears_serial_number_range': '0B803866-0C348031'} • {'model': 'Sea Ray (Oyster White) Sterndrive', 'original_ratio': '1.84:1', 'ratio_if_serviced_with_13:21': None, 'gears_serial_number_range': '0B800854-0C343526'} • {'model': 'Sea Ray (Oyster White) Sterndrive', 'original_ratio': '1.50:1', 'ratio_if_serviced_with_13:21': None, 'gears_serial_number_range': '0B796473-0C340666'} • {'model': 'Sea Ray (Oyster White) Sterndrive', 'original_ratio': '1.32:1', 'ratio_if_serviced_with_13:21': None, 'gears_serial_number_range': '0B804807-0C340030'} • {'model': 'Sea Ray (Oyster White) Transom Assembly', 'serial_number_range': '0B815811-0C340333'} Sea Ray Mercruiser Cross Reference Sea Ray To Mercruiser Cross Reference: • {'sea_ray_model': '3.0L', 'mercruiser_equivalent': '3.0L Alpha One'} • {'sea_ray_model': '4.3L2', 'mercruiser_equivalent': '4.3L Alpha One'} • {'sea_ray_model': '4.3L4', 'mercruiser_equivalent': '4.3LX Alpha One'} • {'sea_ray_model': '5.7L', 'mercruiser_equivalent': '5.7L Alpha One'} • {'sea_ray_model': 'SRX 5.7L', 'mercruiser_equivalent': '350 Magnum Alpha One'} • {'sea_ray_model': 'SRX 7.4L', 'mercruiser_equivalent': '454 Magnum Alpha One'}