Tecumseh / Lauson Outboard Manuals

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Tecumseh Lauson Outboard Model Identification

Lauson Outboard Model and Year Guide: 1940-1956

On some older models I believe the ID was stamped on the transom bracket somewhere. See Table Below for Yearly Models

Starting in 1948 Lauson single and twin cylinder 4-stroke outboards have a model I.D. tag below the power head attached to the transom clamp right at the top of the transom saddle. Lawson outboard serial numbers break down roughly as shown in the groupings list as shown in the table here

Single Cylinder	Twin Cylinder
S-300 = 1948-9 S-350 = 1950 S-351 = 1951 S-352 = 1952 S-353 = 1954 to 1956	T-600 = 1948-9 T-6 50 = 1950 T-651 = 1951 T-652 = 1952 T-653 = 1954 to 1956

About: Tecumseh / Lauson Outboards

Lauson outboards were manufactured by the Hart Carter Corporation in New Holstein Wisconsin (engines and farm machinery manufacturer) from the 1940's through the mid 1950's. Hart Carter sold to Tecumseh Power Products Company in the mid 1950's.

In 1956 Tecumseh entered the small engine market acquiring Lauson and in 1957, acquired the Power Products Company – maker of 2 cycle engines.

Tecumseh engines were used on many outboard brands over the years including; Lauson, Sears Gamefisher & Ted Williams, Eska which also produced private brands for auto, hardware and department store chains.

Lauson outboards were billed as the "Cadillac" of outboards for fisherman and sported a number of innovative features, the most unique being that all of their outboards utilized 4-cycle engines.

The advantages of 4-cycle engines are high fuel economy and excellent slow speed operation compared to 2-strokes.

Lauson begins producing 4-Stroke Outboard Boat Motors

In the early 1940's and just after WWII Lauson produced the OB-410 a small single cylinder 2.5hp outboard. All Lauson 300 and 600 series motors were 4-stroke, and generally had Wico magneto Ignition and Tillotson Carburetors

These engines are designed to be air cooled by fan blades on the flywheel directing air over the cooling fins on the cylinder. To properly cool, the lower engine covers must be in place for proper air flow or the engine will overheat overheat the coils and cause them to fail, evidence of melted coil insulation is often cited.

The On/Off knob on the front of the engine kills the spark and closes the crankcase breather so the engine can be transported without losing oil.

Tecumseh Outboard Resources

• Tecumseh Outboard Parts - on ebay
• oddjobmotors.net lauson.htm
• everythingaboutboats.org tecumseh/
• discount-marine-parts.com lauson

Lauson Outboard Boat Motor Manual Directory

Manual Selection Guide

Lauson Service and Repair Manuals

Year = Published | HP = Horsepower | Models | Publication # | Price | Manual ID

Lauson Repairs and Maintenance Service Manuals

Lauson 1940-1956 Outboard Service Manuals

• smpl = service manual and parts list
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Lauson Owners Operating Instructions Manuals & Parts Lists

Lauson 1940-1956 Outboard Owners Manuals / Parts Lists

• ompl = owner operating instructions manual and parts list
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