Johnson 50 HP 1978 Model 50R78, 50RL78

Clymer - 1973-1990 CLYMER EVINRUDE/JOHNSON OUTBOARD 48-235 HP SERVICE MANUAL  B736

• Covers 48-235 HP
• 1973-1990
• Shop Manual

SELOC - Johnson/Evinrude Outboards 1973-89 Repair Manual #1302

• Covers all 1.25-60 Hp, 1 and 2-cylinder, 2-stroke models.
• 1973-1989
• Repair Manual

18-3083 Sierra Impeller

18-3325 Water Pump Repair Kit  - Without Housing

• The Sierra 18-3325 Water Pump Kit Contains: (1) 18-2705 Oil Seal, (1) 18-3083 Impeller, (1) 18-3108 Impeller Key, (1) 18-3337 Grommet, (1) 18-3343 Wear Plate, (1) 18-7134 O-Ring

18-3336 Water Pump Housing

18-3343 Impeller Wear Plate

18-3376 Water Pump Repair Kit

• Sierra Water Pump Kit
• Meets or exceeds the original equipment quality
• Sierra part number: 18-3376
• Interchangeable with the following: Evinrude/Johnson 384956
• Contains: 18-2705 Oil Seal, 18-3083 Impeller, (2) 18-3136 Bolt, 18-3337 Grommet, 18-3343 Wear Plate, (2) 18-3369 Bolt, 18-7134 O-Ring, 18-3108 Impeller Key

18-3525 Water Pump Repair Kit - With Housing

18-2355 Marine Prop Shaft

For: 35, 40, 48, 50, 55, 60, 70, 75 HP 2 & 3 cyl outboards (1975-1987)

18-3705 Marine Prop Nut

18-3716 Marine Prop Nut Kit

Prop Kit Contents:

• Part #      O.E.#   Description
• 18-3705  314503   Prop Nut
• 18-3742  314502   Cotter Pin
• 18-4228  315810   Prop Spacer

18-3742 Marine Cotter Pin

• Sierra Cotter Pin
• Meets or exceeds the original equipment quality
• Sierra part number: 18-3742-9
• Interchangeable with the following: GLM 22120, Evinrude/Johnson 314502, OMC 314502
• Size: 1/8 x 1-1/4"

18-4230 Marine Thrust Washer

18-4232 Marine Prop Spacer

40 - 75 HP Aluminum Propellers for Small 3-3/8" Gearcase (Thru-Hub Exhaust), 13 Tooth Spline

For Evinrude Johnson OMC BRP, 13 Tooth Spline

• 40-75 HP (Small Gearcase & Thru-Hub Exhaust)
• 13 Tooth Spline, 3-3/8 inch gearcase
• Be sure to count the number of spline teeth on your prop shaft.
•  
• 40 HP, 2 Cyl, 1984 - 2005
• 48 HP, 1987-1996
• 50 HP, 2 Cyl, 1975 - 2005
• 55 HP, 2 Cyl, 1976-1979
• 60 HP 2 Cyl, 1980-1985
• 65 HP, 2 Cyl, 1980-1985
• 75 HP, 3 Cyl, 1975-1985
• Sprint/Formula E  1986-1992

Sorted by Pitch. 

Pitch is how far, in inches,  the boat would travel with 1 prop rotation (under ideal conditions).  Higher pitch = Faster, Lower Pitch = Slower and more power.

OMC and Michigan Aluminum Propellers

Michigan Vortex Aluminum Props,  XHS Drop-In Hub

• C Series Propellers Using XHS 111 or XHSII 221 Drop-In Hub Kit
• 13 Tooth Spline, 3-3/8 inch Gearcase, Thru-Hub Exhaust

40 - 75 HP Evinrude Johnson BRP Aluminum Propellers for Small 3-3/8" Gearcase (Thru-Hub Exhaust)

40 - 75 HP Evinrude Johnson BRP Stainless Steel Propellers for Small 3-3/8" Gearcase (Thru-Hub Exhaust)

Return to Propellers:

40 - 75 HP Stainless Steel Propellers for Small 3-3/8" Small Gearcase (Thru-Hub Exhaust), 13 Tooth Spline

For Evinrude Johnson OMC BRP, 13 Tooth Spline

• 40-75 HP (Small Gearcase & Thru-Hub Exhaust)
• 13 Tooth Spline, 3-3/8 inch gearcase
• Be sure to count the number of spline teeth on your prop shaft.
•  
• 40 HP, 2 Cyl, 1984 - 2005
• 48 HP, 1987-1996
• 50 HP, 2 Cyl, 1975 - 2005
• 55 HP, 2 Cyl, 1976-1979
• 60 HP 2 Cyl, 1980-1985
• 65 HP, 2 Cyl, 1980-1985
• 75 HP, 3 Cyl, 1975-1985
• Sprint/Formula E  1986-1992

Sorted by Pitch. 

Pitch is how far, in inches,  the boat would travel with 1 prop rotation (under ideal conditions).  Higher pitch = Faster, Lower Pitch = Slower and more power.

OMC and Michigan Stainless Steel

Michigan Ballistic High-Performance Stainless Steel,  XHS Drop-In Hub

• C Series Propellers Using XHS 111 or XHSII 221 Drop-In Hub Kit
• 13 Tooth Spline, 3-3/8 inch Gearcase, Thru-Hub Exhaust

Michigan Rapture Performance Stainless Steel

Rubber Hub

40 - 75 HP Evinrude Johnson BRP Aluminum Propellers for Small 3-3/8" Small Gearcase (Thru-Hub Exhaust)

40 - 75 HP Evinrude Johnson BRP Stainless Steel Propellers for Small 3-3/8" Small Gearcase (Thru-Hub Exhaust)

Return to Propellers:

18-5808 STARTER SOLENOID

18-7042 Siearra Carb Kit

Note: 25, 35 HP 1995-Up Except 3 Cylinder Models

18-7093 Sierra Carburetor Needle and Seat

18-7210 Sierra Carburetor Float

18-7222 Sierra Carb Kit With Float

18-7820 Fuel Pump Kit 

• Sierra Fuel Pump Kit
• Contains 18-0850 Fuel Pump Gasket, 18-2900 Cap to Fuel Pump Gasket
• Sierra part number: 18-7820
• Interchangeable with the following: GLM 40820, Evinrude/Johnson 393103, Mallory 9-37702

18-5157 Contact Set

18-5176 Ignition Coil

18-2659 Lower Unit Seal Kit

Note: 60 HP - 2 Cycle Only

Note:  75 HP - Small Gearcase Only

Seal Kit Contents:

• Part #     Desc.      O.E. #               Qty.
• 18-0969 Impeller Housing Gasket 319586 1
• 18-2059 Oil Seal 321466 1
• 18-2060 Oil Seal 321467 2
• 18-2064 Oil Seal 332205 1
• 18-2532 Foam Seal 305762 1
• 18-2537 Rubber Seal 324937 1
• 18-2855 Shift Housing Cover to Gear Case Gasket 314082 1
• 18-4248 Washer 311598 2
• 18-7115 O-Ring 302588 1
• 18-7120 O-Ring 307853 1
• 18-7137 O-Ring 318372 1
• 18-7140 O-Ring 320303 1
• 18-7145 O-Ring 333572 2
• 18-7475 Quad Ring 332584 3

18-7109 Marine O-Ring

ID: 0.214, Width: 0.048

18-7111 O-Ring

ID: 0.197, Width 0.113

18-7123 O-Ring

ID: 2.235, Width: 0.100

18-7128 O-Ring

ID: 1.835, Width: 0.100

18-7137 Marine O-Ring

ID: 0.320, Width: 0.155

18-0543 Oil Seal

• OD: 1.926", Shaft: 1.540", Width: 0.243"

18-6513 Starter Pawl, Pack of 3