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

Go ahead to take this service manual. Please contact to us if with any problems..
This manual can be used by anyone from a first time owner/amateur to a professional technician. Easy to read type, And give you all the information needed to do the procedure correctly. Keep this shop manual handy and use it often. Performing routine, preventive maintenance will save you time & money by helping to prevent premature failure and unnecessary repairs.

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MODELS COVERED:

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


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

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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Language: English
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