This is the COMPLETE Service Repair Manual for the Mercury Mercruiser #6 Sterndrive Units R, MR, Alpha One, Alpha One SS. Production model years 1983 1984 1985 1986 1987 1988 1989 1990. It contains service, repair procedures, assembling, disassembling, wiring diagrams and everything you need to know.
The Service Manual contains detailed information, has specs, diagrams, and actual real photo illustrations, and schemes, which give you complete step-by-step operations on repair, Diagnosing, servicing, technical maintenance & troubleshooting procedures for your Mercury Mercruiser #6 Sterndrive Units R, MR, Alpha One, Alpha One SS. this manual offers full information you need for repair your Mercury Mercruiser #6 Sterndrive Units R, MR, Alpha One, Alpha One SS. the information in this manual will enable you to find trouble and to understand how to repair and maintain your machine without going into service. YOU CAN DO THE REPAIRS YOURSELF AND SAVE MONEY $$$
Models Covered:
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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 / 1.32:1 – 1.50 / 1.32:1 – 0A545004 and Above
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 REPAIR MANUAL CONTAINS:
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1 – IMPORTANT INFORMATION
A – Important Information
B – Maintenance
C – Troubleshooting
2 – REMOVAL, INSTALLATION AND ADJUSTMENTS
A – All Models
3 – STERN DRIVE 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
4 – TRANSOM ASSEMBLY
A – Service Procedures Requiring Minor Disassembly
B – Service Procedures Requiring Major Disassembly
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
6 – STEERING SYSTEMS
A – Power Steering
B – Manual Steering
7 – CORROSION PROTECTION
A – All Models
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** Model Specification: Mercury Mercruiser #6 Sterndrive Units R, MR, Alpha One, Alpha One SS
** Model Year: 1983-1990
** Language: English
** Total Pages: 566
** File Format: PDF
** Requirements: Adobe PDF Reader
** Compatible: All Versions of Windows & Mac, Linux OS, Iphone, Ipad, Android etc…
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