REO Engine Chronology

REO Engine Chronology

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REO data used by permission and belong to their respective owner.
Courtesy of Doug Bauman.

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1946	Engine Models	Briggs NPR6, Clinton 722ABR6
1946	Lawnmower Models	Trimalawn

1947-48	Engine Models	Briggs NPR6, Clinton 722ABR6
1947-48	Lawnmower Models	Royale, Trimalawn, Townhouse, Runabout

1949	Engine Models	552, 556
	Lawnmower Models	Royale, Trimalawn
REO engine design introduced

1950	Engine Models	552, 556
	Lawnmower Models	Royale, Trimalawn, Townhouse (Electric)
Electric mower introduced (Townhouse)

1951	Engine Models	211E, 338E, 404E
	Lawnmower Models	Royale, Trimalawn, Townhouse, Runabout
REO self lift carburetor introduced on engine model 404 (Runabout) Runabout introduced Cast iron parts substituted - valve cover, stator plate, cylinder head, oil pan REO lawn mower service school started

1952	Engine Models	211F, 338F, 404F
	Lawnmower Models	Royale, Trimalawn, Townhouse, Runabout
REO Mechanics Manual published First woman graduates from REO service school

1953	Engine Models	211G, 338G, 404G, 660G, Power Products Type 270
	Lawnmower Models	Royale, Trimalawn, Townhouse, Runabout, Revo-Jet, Flying Cloud, Electra-Lawn
Revo-Jet (rotary) introduced with Power Products Type 27 engine Flying Cloud (rotary) introduced Electra-Lawn (rotary electric) introduced rubber grommet first used in gas tank outlet New silent muffler introduced MW parts prefix started

1954	Engine Models	211H, 660H, 2230H, 2340H, 2840H, 3200H, 2980H (Holiday engine), Power Products Type 270
	Lawnmower Models	Royale, Trimalawn, Townhouse, Runabout, Revo-Lawn, Flying Cloud, Electra-Lawn, Sabre-Jet, Holiday, Snow Throw
Motor Wheel Corp. buys REO Motors, Inc. in Sept 1954 Sabre-Jet (rotary) introduced - self propelled Revo-Lawn (rotary) introduced Snow Blower introduced Holiday model introduced (red mower and black engine) - four models

1955	Engine Models	3300J, 3310J, 3320J, 3810J, 3330J, 3350J, 3600J, 4000J, Lauson SLV20, SLV22
	Lawnmower Models	Royale, Trimalawn, Townhouse, Runabout, Revo-Jet, Flying Cloud, Electra-Trim, Spin-Trim, Sabre-Trim, Scotty, Ride-A-Lawn, Snow Throw
Ride-A-Lawn introduced Scotty introduced Spin-Trim (REO rotary 3330J engine) introduced Sabre-Trim (rotary) introduced Revo-Trim (rotary) introduced uses REO 3330J as well as Lauson engine Electra-Trim (rotary) introduced REO 3330J vertical shaft engine introduced (adapted previous horizontal) New fuel tank cap baffle introduced Gas tank mounted in rubber grommets (to reduce cracking of tank welds) Rider attachment made available for Royale and Runabout Spark plug wire changed to use split type terminal Horsepower increased - Bore now 2-1/8" was 2" New copper head gasket

1956	Engine Models	5200K, 5210K, 5220K, 5230K, 5240K, 5250K, 5260K, Clinton VS200
	Lawnmower Models	Royale, Trimalawn, Power Trim, Spin-Trim, Scotty, Revo Trim, Ride-A-Lawn, Snow Throw
Power Trim introduced (rotary) New colors shades of cream and green introduced Revo Trim uses Clinton VS200 and VS400

1957	Engine Models	5200-7, 5210-7, 5230-7, 5240-7, 5250-7, 5260-7, Clinton VS2100, Power Products V47
	Lawnmower Models	Royale, Trimalawn, Power Trim, Spin-Trim, Scotty, Revo Trim, Ride-A-Lawn
Electric start kit introduced fits 1955 and later REO engines Revo Trim uses Power Products V47 and Clinton VS2100

1958	Engine Models	5210-8, 5220-8, 5260-8, M21, M22, M41, M42, M43 (Not REO engine design)
	Lawnmower Models	Royale, Trimalawn, Economy 21,Deluxe 21, Special, Budject Special, Power Trim, Ride-A-Lawn, Snow Throw
Motor Wheel phases out original REO engine design and uses Lauson (Power Products) engines identified with M prefix.

1959	Engine Models	M23, M44, M45, M46, M47, M48, M50, M51, M52, M53 (Not REO engine designs)
	Lawnmower Models	Royale, Economy (2 cycle), Economy (4 cycle), Pivotrim, Turfman, Power Trim, Riding Rotary, Snow Throw
REO engine design is no longer produced Last Royale is made

1960	Engine Models	M45, M46, M48, M51, M53, M54, M57, M58 (Not REO engine designs)
1960	Lawnmower Models	Economy (4 cycle), Power Trim, Riding Rotary, Snow Throw

1961

REO name continues to be used by Motor Wheel Corp. In September 1963 Wheel Horse buys the REO line and uses it for several years, selling a riding mower, snow blower and some rotary mowers with the REO name.

COLOR CODE - After comparing the most unweathered painted region on over 20 Reo engines, I came to the conclusion that no two are exactly the same, however, unless you have two side by side you will likely never know. The following is the closest paint code that I have found.

Dupont Centari N7946A
1979 Volkswagen-Audi Mountain Green

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Last modified: 06 / 20 / 2009