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Neptune Outboard Motors



Neptune   Model Year Guide

1941 - 1971

(All models made by Muncie Gear Works)

Model Serial Description HP Cyl Notes
                              1941                         
11A1   Junior Single 1.5 1  
11B1   Junior Single 1.5 1  
11A3   Neptune Special 3.5 2  
11AA3   Neptune Special 3.5 2  
11B3   Neptune Special 3.5 2  
11A4   Junior Neptune 4 2  
11B4   Junior Neptune 4 2  
11A6   Improved Twin 6 2  
11AA6   Improved Twin 6 2  
11B6   Improved Twin 6 2  
11A9   Neptune 9 9.5 2  
11A10   Neptune 9 9.5 2  
11AA10   Neptune 9 9.5 2  
11B9   Neptune 9 9.5 2  
11A16   Master Twin 16 2  
11B16   Master Twin 16 2  
                              1942                         
13A12   Neptune Master 16 2 Long Shaft
                              1943                         
                              1944                         
                              1945                         
                              1946                         
15A1   Junior Single 1.5 1  
15B1   Junior Single 1.5 1  
15B2   Neptune Single 2.5 1  
15A3   Neptune Special 3.5 2  
15A4   Junior Neptune 4 2  
15A9   Neptune 9 9.5 2  
15AA9   Neptune 9 9.5 2  
15AA10   Neptune 9 9.5 2  
                              1947                         
17A1   Junior Single 1.7 1  
17B1   Junior Single 1.7 1  
17A2   Neptune Single 2.7 1  
17A3   Neptune Special 3.5 2  
15B4   Junior Neptune 4 2  
15A6   Improved Twin 6 2  
15AA6   Improved Twin 6 2  
15A9   Neptune 9 9.5 2  
15AA9   Neptune 9 9.5 2  
                              1948                         
18AA3   Neptune Special 3.5 2  
18AA6   Improved Twin 6 2  
18AA10   Neptune 9 9.5 2  
                              1949                         
A1     1.7 1  
B1     1.7 1  
A2     3.3 1  
AA2     3.3 1  
AA4     5 2  
AA6     7 2  
AA10     10.5 2  
                              1950                         
A1     1.7 1  
AA2   Neptune 3.3 1  
AA4   Neptune 5 2  
AA6   Neptune 7 2  
AA10   Neptune 10.5 2  
                              1951                         
A1   Neptune 1.7 1  
AA2   Neptune 3.3 1  
AA4   Neptune 5 2  
AA6   Neptune 7 2  
AA10     10.5 2  
                              1952                         
                              1953                         
                              1954                         
A1   Neptune 1.7 1  
                              1955                         
A1   Mighty Mite 1.7 1  
                              1956                         
A1   Mighty Mite 1.7 1  
                              1957                         
AA1A   Mighty Mite 1.7 1  
                              1958                         
AA1A   Mighty Mite 1.7 1  
                              1959                         
AA1A   Neptune 1.7 1  
                              1960                         
AA1A   Mighty Mite 1.7 1  
                              1961                         
WC1   A-1-RK 1.7 1  
                              1962                         
Mighty Mite     1.7 1  
                              1963                         
WC1     1.7 1  
                              1964                         
WC1 A-1-RP   1.7 1  
                              1965                         
WC1     1.7 1  
                              1966                         
WC1 A-1-RR   1.7 1  
                              1967                         
WC1     1.7 1  
                              1968                         
WC1     1.7 1  
                              1969                         
WC1     1.7 1  
                              1970                         
Mighty Mite     1.7 1  
                              1971                         
Mighty Mite 500     1.7 1  

Model Number Codes:
 
There was a loose code of letters and numbers used to identify the early "Muncie Gear" outboard models.
 
Prefix OB = Outboard
Suffix First Letter (no letter) = Was labeled Private Brand like Motorgo, Sea King, etc.  example: OB3
Suffix First Letter (A) = Was labeled Neptune  example: OB3A
Suffix First Letter (B or C) = Was labeled Muncie  example: OB3B
Suffix Second Letter (U) = Underwater Exaust  example: OB3AU
In the early 40's:  A = Standard Model   AA = Deluxe Model w/ Rewind and Hood
Through the years the numerical number would identify horsepower and year of manufacture.


Muncie Gear Works Ended Production in 1970    Sales Were Discontinued In 1971

Neptune   Model Year Guide

1930 - 1940       1941 - 1971      1972 - 1987





Discount Marine Parts
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Last Modified: 4/24/04