Johnson 20 HP 1973 Model 20R73, 20RL73

Clymer - Evinrude Johnson Outboard Shop Manual 1.5 to 125 Hp 1956-1972  B734

• Covers 1.5 - 125 HP 2-Stroke
• 1956-1992
• Outboard 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

18-3002 Impeller

Impeller / Water Pump should be replaced every year or two.  Does not include impeller plate which does not need to be replaced every time.

18-3203 Marine Impeller Repair Kit

Contains 18-3002 Impeller and 18-3103 Plate.

18-3377 Water Pump Repair Kit without Housing 

• The Sierra 18-3377 Water Pump Kit without Housing is interchangeable with the following: Evinrude/Johnson 0382468. Contains one each: 18-3002 Impeller, 18-3103 Impeller Plate, 18-3326 Impeller Key, 18-3329 Grommet. Each Sierra product meets or exceeds the original equipment part it replaces.
• Sierra Water Pump Kit without Housing
• Contains one each: 18-3002 Impeller, 18-3103 Impeller Plate, 18-3326 Impeller Key, 18-3329 Grommet
• Sierra part number: 18-3377
• Interchangeable with the following: Evinrude/Johnson 0382468

10-28 HP Aluminum Propellers for Johnson Evinrude (Pin Drive) Split Gearcase

• For Evinrude Johnson OMC
• 10 HP  1951-1957
• 15 HP  1953-1956
• 18 HP  1957-1973
• 20 HP  1969-1973
• 25 HP  1969-1977
• 28 HP  1964
• Pin Drive, Split Gearcase

Hard to find on Amazon, but they have them on eBay.

10-28 HP Aluminum Pin Drive, Split Gearcase

Return to Propellers:  

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

18-5002 Ignition Tune-Up Kit

Kit Contains:

• 18-5205 Condenser 581419 qty 2
• 18-5156 Contact Set 580148 qty 2

Sierra International 18-5156 Contact Set

18-5163 Sierra Ignition Coil

18-5205 Condenser

Champion Spark Plug - Cj8 J8C 841

Evinrude / Johnson Gap .030

Mercury Outboards

• 15 HP 1966-1960  150    0.025
• 10 HP 1966-1960  100    0.025
• 10 HP 1966-1960  110    0.025
• 6 HP 1966-1960  60   0.025
• 3.9 HP 1966-1960  39    0.025

18-2684 Marine Lower Unit Seal Kit

Seal Kit Contents:

• Part #      Desc.              O.E.#    Qty.
• 18-0882  Shift Rod Gasket 304764  1
• 18-2032  Oil Seal 321788 1
• 18-4248  Washer 311598 2
• 18-7100  O-Ring 301877 1
• 18-7120  O-Ring 307853 1
• 18-2031  Oil Seal 321787 1
• 18-2534  Spaghetti Seal 309044 1

18-7100 O-Ring

ID: 0.245, Width: 0.155

18-7111 O-Ring

ID: 0.197, Width 0.113

18-7120 O-Ring

ID: 0.215, Width: 0.065

18-4904 Starter Handle and Rope for Johnson/Evinrude

• Sierra Starter Handle and Rope Kit
• Rope size: #4.5
• Sierra part number: 18-4904

18-6501 Rewind Spring for Johnson/Evinrude

• Sierra Rewind Spring
• Meets or exceeds the original equipment quality
• Sierra part number: 18-6501
• Interchangeable with the following: Evinrude/Johnson 395460, 307573
• Fit specific, check part numbers to ensure proper fit