This factory service manual PDF download provides detailed service information, step-by-step repair instruction and maintenance specifications for your MerCruiser R·MR·Alpha One· Alpha One SS Sterndrive Units. This comprehensive overhaul and repair manual is designed as a "Service Guide" for MerCruiser models listed. It provides specific information including procedures for disassembly, assembly, inspection and adjustment, to enable dealers and service mechanics to keep the MerCruiser in top operating condition. The procedures are supplemented with photos and Illustrations. All Official Mercury Marine Manuals for MerCruiser Sterndrives and Inboards include easy to follow, step-by-step illustrated procedures based on the complete dismantling, repair, and assembling of boat motors, from the simplest repair to complex procedures, this manuals give you everything you need to do the job with confidence. Models Covered in This Manual : Transom Assemblies Model - Serial Number MC 120R/140B/185R/488R/898R/228R/260R - 6216687 - 6849289 MC 120MR/140MR/170MR/185MR/190MR/200MR/230MR/260MR/300 Tempest MR - 6849290 - 0A471374 MC Alpha One/Alpha One SS - 0A471375 and Above Sterndrive Units MC 120R-260R Original Ratio - Ratio If Serviced With 13:21 - Gears Serial Number 1.98:1 - 1.94:1 - 6237861-6854392 1.84:1 - 1.81:1 - 6225577-6862701 1.65:1 - 1.62:1 - 6268065-6810537 1.50:1 - 1.47:1 - 6229158-6847029 1.32:1 - 1.29:1 - 6231571-6663947 MC 120 MR - 300 TEMPEST MR Original - Ratio Ratio - If Serviced With 13:28 - Gears Serial Number 1.98:1 - 1.94:1 - 6854393-0A476746 1.84:1 - 1.81:1 - 6862702-0A470164 1.65:1 - 1.62:1 - 6810538-0A475786 1.50:1 - 1.47:1 - 6847030-0A479506 MC ALPHA ONE / ALPHA ONE SS Original Ratio - Ratio If Serviced With 13:28 - Gears R.H. Serial Number - L.H. Serial Number 1.98:1 - 1.98:1 - 0A476747 and Above - 0C881740 and Above 1.84:1 - 1.84:1 - 0A470165 and Above - 0C884040 and Above 1.65:1 - 1.65:1 - 0A475787 and Above - 0C881790 and Above 1.50:1 - 1.50:1 - 0A479507 and Above - 0C852908 and Above 1.32:1 - 1.32:1 - 0A613927 and Above Alpha One SS - 1.50/1.32:1 - 0A545004 and Above 1.50:1/1.32:1 Sea Ray Sterndrive Units and Transom Assembly (Oyster White) Original Ratio - Ratio If Serviced With 13:21 - Gears Serial Number 1.98:1 - 0B803866-0C348031 1.84:1 - 0B800854-0C343526 1.50:1 - 0B796473-0C340666 1.32:1 - 0B804807-0C340030 Transom Assembly - 0B815811-0C340333 When making repairs to Sea Ray (Oyster White) sterndrives, follow procedures as outlined for corresponding MerCruiser models as shown in the cross-reference chart below. Sea Ray - MerCruiser 3.0L - 3.0L Alpha One 4.3L2 - 4.3L Alpha One 4.3L4 - 4.3LX Alpha One 5.7L - 5.7L Alpha One SRX 5.7L - 350 Magnum Alpha One SRX 7.4L - 454 Magnum Alpha One Service Manual Outline : 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 Language : English File Format : PDF Delivery method : Download This manual pdf download will come in PDF format, so it's EXTREMELY easy to move around with you from computer to computer. Many mechanics purchase electronics manuals like this and use a laptop near them while doing maintenance! If you don't have a laptop, no problem! Just print out the pages of the manual that you need and you've got a hard copy in front of you while doing your work! Simply throw it away when your finished! It's much easier and quicker than having to deal with a book!. Related Keywords : index of / pdf, download, boat, info, library, boatinfo, service, repair, workshop, book, shop, manual, brochure, bulletin, marine, engine, sterndrive, stern, drive, maintenance, fix, motor, outdrive, outboard, inboard, service manual, repair manuals, maintenance.