Mercury Mercruiser Marine Engines Number 6 Stern Drive Units R, MR, Alpha One, Alpha One SS Workshop Service Repair Manual Download This is the Most Practical Service Repair Manual for the Mercury Mercruiser Marine Engines Number 6 Stern Drive Units R, MR, Alpha One, Alpha One SS Workshop Service Repair Manual Download ever compiled by mankind. This DOWNLOAD contains of high quality diagrams and instructions on how to service and repair your Mercury Mercruiser. This is a must for the Do-It-Yourselfer! Saving Yourself $$$$$$ In Service Repair And Maintenance Costs !!!! Instant Download and Bring good luck for you !!! Models Covers: 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 This Service Manual: 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 This Manual Covers: General Information Removal-Installation Alignment Electrical System Fuel System Engine Drive systems Accessories Specifications Tools Service repair manual are INSTANT DOWNLOAD Its means no shipping cost or waiting for a CD to arrive in the mail...you will receive this manual today via instant download on completion of payment via our secure payment processor. We accept all major credit/debit cards/paypal. It is great to have, will save you a lot and know more about your Mercury Mercruiser.All pages are printable. File Format: PDF Compatible: All Versions of Windows & Mac , APP ISO, Iphone, Ipod, Android etc Language: English Requirements: Adobe PDF Reader Looking for some other Service Repair Manual, please check: Thanks for visiting! Happy Shopping!