Model Chronology 1948-1984

ENGINES WITH NUMBERS — ALPHA MODELS

Below are the Motors and Engines listed according to Model or Serial Number, along with the approximate dates that they were manufactured for commercial
use:
DATE MODEL MODEL DATA
1948 August to 1962 December 9 Cast Iron
1948 March to 1963 September 14 Cast Iron
1949 August to 1956 August 6H Cast Iron
1949 August to 1953 April 6HF Cast Iron
1949 August to 1952 May 6HS Cast Iron
1949 June to 1957 June 5S Cast Iron
1949 September to 1957 July 6HSF Cast Iron
1949 August to 1957 June 8 Cast Iron
1949 January to 1957 February 23 Cast Iron
1950 March to 1957 January 5 Cast Iron
1950 March to 1957 August 8HF Cast Iron
1952 June to 1957 June 6 Cast Iron
1952 October to 1953 June 6AHS Cast Iron
1952 August to 1953 July 6AH Cast Iron
1953 January to 1957 July 8AHF Cast Iron
1953 May to Ju1y 1958 July 6BH Aluminum Casting
1953 May to 1958 July 6BHS Aluminum Casting
1955 June to 1958 July 6B Aluminum Casting
1955 June to 1958 July 6B Aluminum Casting
1955 June to 1958 July B Aluminum Casting
1955 June to 1958 July BH Aluminum Casting
1957 January to 1965 August 23A Cast Iron
1958 June 60100 Kool Bore
1958 July 80300 Kool Bore
1958 July 80400 Kool Bore
1958 June to 1960 January 81700 Sleeve Bore
1958 June to 1963 August 60700 Kool Bore
1958 July to 1963 August 61700 Sleeve Bore
1958 June to 1964 May 60500 Kool Bore
1958 July to May 1964 61500 Sleeve Bore
958 June to 1964 July 80500 Kool Bore
1958 June to 1964 July 80700 Kool Bore
1958 December to 1964 80600 Kool Bore
1958 August to 1969 December 81400 Sleeve Bore
1958 August to 1969 December 81100 Sleeve Bore
1960 June 80200 Sleeve Bore
1960 May to 1960 November 81600 Sleeve Bore
1958 July to 1965 July 140000 Kool Bore
1958 July to 1970 January 61100 Sleeve Bore
1958 July to 1970 January 61300 Sleeve Bore
1958 July to 1970 January & 1977
August
81300 Sleeve Bore
1958 July to 1971 August 60400 Kool Bore
1958 July to 1977 August 80100 Kool Bore
958 July to 1977 August to August 41000 Sleeve Bore
1959 July to June 1964 81900 Sleeve Bore
1958 September to 1965 July 343000 Sleeve Bore
1959 September to 1960 September 80800 Kool Bore
1959 September to 1970 January 61400 Sleeve Bore
1959 July to 1964 November 80900 Kool Bore
1960 February to 1962 January 85500 Sleeve Bore
1960 May to 1960 August 81800 Sleeve Bore
1960 August to 1963 June 23C Cast Iron
1960 August to 1963 March 60900 Kool Bore
1960 August to 1963 March 61900 Sleeve Bore
1960 March to 1969 December 81200 Sleeve Bore
1960 July to 1970 January 61200 Sleeve Bore
1960 August to 1971 August 60200 Kool Bore
1960 October to 1961 January 85900 Sleeve Bore
1960 October to 1961 September 84500 Kool Bore
960 December to 1960 September 84700 Kool Bore
961 November to 1987 August 100200 Kool Bore
1962 January to 1977 August 100900 Kool Bore
1962 May to 1965 July 142000 Kool Bore
1963 January to 1965 August l9D Cast Iron
1963 April to 1965 August 23D Cast Iron
1964 July to June 1965 June 82500 Kool Bore
1964 July to 1965 August 82900 Kool Bore
1965 July to 1971 August 146400 Kool Bore
1965 July to 1966 August 91400 Cast Iron
1965 June to 1968 August 92500 Kool Bore/Choke-A-Matic
1965 June to 1968 August 92900 Kool Bore Choke-A-Matic
1965 August to May 1966 144000 Kool Bore
1965 August to 1966 August 145000 Sleeve Bore
1965 August to 1966 September 193400 Cast Iron
1965 August 230000 Cast Iron
1965 August 240000 Cast Iron
1966 July 130900 Kool Bore
1966 July 130200 Kool Bore
1966 July 170700 Kool Bore
1966 August 10400 Kool Bore
1966 August to 1975 200000 Cast Iron
1966 November to 1971 August 30000 Cast Iron/Synchro-Balanced
1967 October to 1969 April 171700 Kool Bore/Synchro-Balanced
1968 August 92900 Kool Bore/Automatic Choke
1968 August 92500 Kool Bore/Automatic Choke
1969 April to 1971 August 320000 Cast Iron/Synchro-Balanced
1969 June 190400 Kool Bore
1969 June 190700 Kool Bore
1971 June to 1972 August 301400 Cast Iron/Synchro-Balanced
1971 June to 1972 November 325400 Cast Iron/Synchro-Balanced
1972 September to 1977 August 302400 Cast Iron/Synchro-Balanced
1972 February 326400 Cast Iron/Synchro-Balanced
1973 October 110900 Kool Bore
1973 May to 1977 August 251400 Kool Bore/Synchro-Balanced
1973 May to 1977 August 251700 Kool Bore/Synchro-Balanced
1976 August to 1983 August 111900 Kool Bore
1976 August to Aug 1983 August 111200 Kool Bore
1977 August 252400 Kool Bore/Synchro-Balanced
1977 August 252700 Kool Bore/Synchro-Balanced
1977 November 253400 Kool Bore/Synchro-Balanced
1977 December to 1981 August 4014001 Kool Bore
1977 December to 1981 August 401700 Kool Bore
1978 July 131400111 Sleeve Bore I/C
1978 July 131900 Sleeve Bore I/C
1978 July 131200 Sleeve Bore I/C
1978 July to 1980 July 220400 Kool Bore
1978 July 220700 Kool Bore
1979 January to 1981 August 401430 Kool Bore
1980 April to1981 August 421700 Kool Bore
1980 May 62030 Kool Bore -Two Cycle
1980 August 94500 Automatic Choke Quiet Series
1980 August 94900 Automatic Choke Quiet Series
1980 August 113900 Kool Bore Quiet Series
1980 August to 1982 August 95500 Automatic Choke/Quiet Series
1980 August 221400 Sleeve Bore I/C
1980 August 222400 Kool Bore
1980 August 402400 Sleeve Bore I/C
1980 August 422400 Sleeve Bore I/C
1981 August 93500 Kool Bore/Automatic Choke
1981 August 112200
1981 August 402700 Sleeve Bore I/C
1981 August 422700 SleeveBore I/C
1982 August 82200 SleeveBore I/C Quiet Series
1982 August 114900 SleeveBore I/C Quiet Series
1982 August 132200 Sleeve Bore I/C Quiet Series
1982 August 132400 Sleeve Bore I/C Quiet Series
1982 August 132900 Sleeve Bore I/C Quiet Series
1983 January 171400 Sleeve Bore I/C Quiet Series
1983 August 82300 . Sleeve Bore I/C Quiet Series
1983 August 82400 SleeveBore I/C Quiet Series
1983 August 112900 Sleeve Bore
1983 August to 1984 August 101120 Electric 120 Volt Moto
1983 August 193700 Sleeve Bore I/C Synchro-balanced
1983 August 192700 Sleeve Bore I/C
1984 to October 90700 Kool Bore/Max Series
1984 to October 91700 Kool Bore/Max Series
1984 October 110700 Kool Bore/Max Series
1984 October 111700 Kool Bore/Quiet Max Series
1984 October 112700 Sleeve Bore/Max Series
1982 August 253700 Sleeve Bore I/C Synchro-Balanced
1984 August 254400 Sleeve Bore I/C Synchro-Balanced
1983 August to 1984 August 748000 Electric 120-Volt Motor