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

Download Complete Service Repair Manual for 1983-1990 Mercury Mercruiser Sterndrive Units R MR Alpha One Alpha One SS

This Factory Service Repair Manual offers all the service and repair information about 1983-1990 Mercury Mercruiser Sterndrive Units R MR Alpha One Alpha One SS

The information on this manual covered everything you need to know when you want to repair or service 1983-1990 Mercury Mercruiser Sterndrive Units R MR Alpha One Alpha One SS

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

98:1 194:1 6237861-6854392
184:1 181:1 6225577-6862701
165:1 162:1 6268065-6810537
150:1 147:1 6229158-6847029
132:1 129:1 6231571-6663947

MC 120 MR 300 TEMPEST MR
Original Ratio Ratio If Serviced With 13:28 Gears Serial Number
1

98:1 194:1 6854393-0A476746
184:1 181:1 6862702-0A470164
165:1 162:1 6810538-0A475786
150:1 147:1 6847030-0A479506

MC ALPHA ONE / ALPHA ONE SS
Original Ratio Ratio If Serviced With 13:28 Gears
R

H Serial Number LH Serial Number
198:1 198:1 0A476747 and Above 0C881740 and Above
184:1 184:1 0A470165 and Above 0C884040 and Above
165:1 165:1 0A475787 and Above 0C881790 and Above
1

50:1 150:1 0A479507 and Above 0C852908 and Above
132:1 132:1 0A613927 and Above
Alpha One SS 150:1 / 132:1 150 / 132:1 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
184:1 0B800854-0C343526
150:1 0B796473-0C340666
132:1 0B804807-0C340030
Transom Assembly 0B815811-0C340333

SEA RAY MERCRUISER
3

0L 30L Alpha One
43L2 43L Alpha One
43L4 43LX Alpha One
57L 57L Alpha One
SRX 57L 350 Magnum Alpha One
SRX 74L 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

This manual can be used by anyone from a first time owner/amateur to a professional technician

Even the most novice mechanic can also easily follow the step-by-step guides which are made simple by the illustrations and drawingsKeep this manual handy and use it often Performing routine preventive maintenance will save you time & money by helping to prevent premature failure and unnecessary repairs

Your will receive a download link immediately after your payment is completedSo please make sure your email address is correct

File Format: PDF
Compatible: All Versions of Windows & Mac
Language: English