Model Mark 20

General Information:

• This model was painted "Mercury Green" and "Dull Aluminum."
• Model & serial numbers were on the instruction plate riveted to the swivel bracket above and between the clamp screws.
• Serial numbers 700000 thru 753906 were 1953 models.
• 753907 thru 817412 were 1954 models.
• 817413 thru 860976 were 1955 models.
• This model used a special pressurized 2-line fuel system.  Some of these engines have had fuel pumps added by owners because of scarcity of original 2-line components.

Some items we have available for this model:

• Parts list 90-26117
• Owners manual 90-39419
• Service manual 90-25500
• Starter Rope 50-12066T9
• New! Recoil Starter Spring 24-20775A2
• Starter Handle 20662
• Starter Handle Insert 20172
• Cowl to cowl rubber bumpers 20721
• New! Cowl Screws 10-25918
• Powerhead Gasket Set 27-24146-1
• Standard Piston Rings 39-20058 (6 per engine)
• Top Crankshaft Seal 26-16977
• Bottom Crankshaft Seal 26-20948
• Spark Plug J6C (2 per engine)
• Spark Plug Wire 23564A10 (2 per engine)
• Coil 399-125 (2 per engine)
• Condenser 399-123 (2 per engine)
• Flywheel Nut Tool Casting 91-24710
• Carburetor Gasket & Packing Kit 1395-9258A1
• Carburetor Float 1395-8673
• Custom Fuel Connector 20396A2 (for engines converted to fuel pump)
• Upper Steering Swivel Bushing 23-46938
• Lower Steering Swivel Bushing 23-20638
• Tilt Adjusting Pin 17-56373A2
• Steering Bar 20892A1
• Lower Unit Driveshaft Seal 26-20070
• Lower Unit Prop Shaft Seal 26-20070
• New! Lower Unit Seal Kit 26-20236K
• Water Pump Cover 20816A1
• Water Pump Impeller 47-20813
• Gear Lube 92-24734-1
• Drain Plug with Gasket 10-79953T2
• Vent Screw with Gasket 10-28653K
• New! Gearcase Cover 20827
• Mercury Green Paint 92-25098
• Dull Aluminum Paint 92-25099
• Many additional parts, please inquire!