Mercury Mercruiser #6 Sterndrive Units R, MR, Alpha One, Alpha One SS Service Repair Manual

Mercury Mercruiser #6 Sterndrive Units R, MR, Alpha One, Alpha One SS Service Repair Manual 1983-1990 Download

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. This invaluable technical manual includes needed instructions to maintain and service your equipment using detailed diagrams and manufacturers specifications.

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
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TABLE OF CONTENTS:
========
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
** ZOOM IN/OUT: YES
** Compatible: All Versions of Windows & Mac, APP ISO, Iphone, Ipad, Android etc...

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This manual provides detailed service information, step-by-step repair instruction and maintenance specifications for your Mercury Mercruiser #6 Sterndrive Units R, MR, Alpha One, Alpha One SS.

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.

Save Money $$$$$$ By doing your own repairs! All pages are printable, so run off what you need & take it with you into the garage or workshop.

INSTANT DOWNLOAD means NO SHIPPING COST or WAITING FOR A CD OR PAPER MANUAL 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.

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