Mariner 40HP 50HP 60HP 70HP Service Manual 1989


Mariner 40HP 50HP 60HP 70HP Service Manual 1989

Good condition for age.

Note workshop based (e.g. ring binder) format.

Status: Some Sections available to Download


Mariner 40HP 50HP 60HP 70HP Service Manual 1989

Printed in 1989 this ringer binder service manual covers multiple 3-cylinder and 4-cylinder models of that period spanning serial numbers:

Models 45 | 50 | 60 (3 cylinder):

US – 4576237 and up
Canada 7088598 and up
Australia 8042650 and up
Belgium 9136250 and up

Models 70 with serial numbers:

7 chapters and over 150 pagess covering:

  • Specifications
  • Periodic Checkup
  • Motor Installation and rigging
  • Propeller Recommendations
  • Fuel and Fuel System
  • Operation including starting procedure
  • Adjustments and Maintenance
  • Spares and Special care

Part No. m-90-86135-5

General Specifications
Model (In-Lines)45 & 50 HP (4 Cyl)50 HP (3 Cyl) 60 & 70 HP
Full Throttle RPM Range5000-5500 RPM5300-5800 RPM
Idle RPM Range in Forward Gear600-700 RPM
Engine Type4-Cylinder In-Line
3-Cylinder In-Line
Cu. In. Displacement44 (721 cc)49.8 (816cc)
Cylinder BoreStandard—-2.565″ (65.151mm)2.875″ (73.025mm)
.015″ Oversized—-2.580″ (65.532mm)2.890″ (73.422mm)
.030″ Oversized—-2.905″ (73.787mm)
Stroke2-1/8″ (53.98mm)2-9/16″ (65.09mm)
Firing Order1-3-2-41-2-3 1-3-2 •
Ignition TypeThunderbolt Breakerless
Spark PlugsAC-V4OFFK or •
Champion L78V
AC-V4OFFM or A Champion L76V
Engine Weight (Fuel Tank Not Included)50E 176 lbs. (80kg) 50M 168 lbs. (76kg)190 lbs. (86kg)
Fuel Tank Supplied; Includes Capacity for Oil)6 Gallons (22.7 Liters)
Reed Stop Opening5/32″ (3.969mm).180″ (4.572mm)
Piston Diameter-StandardAbove Rings—-2.551″ (64.800mm)2.863″ (72.720mm)
Skirt—-2.558″ (64.973mm)2.872″ (72.949mm)
Piston Diameter .015″ OversizedAbove Rings2.566″ (65.176mm)2.878″ (73.101mm)
Skirt2.573″ (65.354mm)2.887″ (73.330mm)
Piston Diameter .030″ OversizedAbove Rings—-2.893″ (73.482mm)
Skirt—-2.902″ (73.711mm)
Piston Ring DiameterStandard2.562″ (65.075mm)2.874″ (73.000mm)
.015″ Oversized2.577″ (65.459mm)2.889″ (73.381mm)
.030″ Oversized2.904″ (73.761mm)
Carburetor Jet SizesSee Char . Following
Fuel Pump Discharge Pressure
NOTE: Fuel Pressure specification listed under “45 & 50 HP (4 Cyl)” are for non-carburetor mounted square fuel pumps.
2.0 to 3.25 psi (13.8 to 22.1 kPa) at idle 5.5 to 6.5 psi (379 to 44.8 kPa) at WOT22 psi (13.8 kPa) at Idle 4 to 4-1/2 psi (27.6 to 31 kPa) at WOT1
3-5 PSI (20.7 1034.5 kPa at idle
6,8 Dt.J.1 01.4 to 56.2 :tea; at WCTz
Fuel Tank Weight’10 lbs. (4.54kg) Empty; 50 lbs. (22.78kg) Full
BatteryMin. Reserve Capacity Rating of 100 Minutes
Starter Motor Amperes Draw A-50-55601 A-50-65436 A-50-72521 A-50-4436940 Amps No Load: 100 Amps Cranking Outboard 40 Amps No Load: 145 Amps Cranking Outboard 40 Amps No Load: 100 Amps Cranking Outboard 40 Amps No Load: 100 Amps Cranking Outboard
Gear HousingForward-Neutral-Reverse
Gear Ratio02:011.64:1 1.83:1■
Forward Gear – No. of Teeth2623
Pinion Gear – No. of Teeth1314
Gear Housing Lubricant Capacity12.5 Fl. Oz. (370m1)
Engines with the Following Serial Nos.
and Above
and Above
and Above
and Above

View other Mariner Manuals


Additional information


Purchase Printed Manual, Download Table of Contents, Download Specifications Table, Download Carburetor Sizes & Lubrication Chart, Download Chapter 1 (General Info)

Wiring Diagrams







Two and Four

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