this design also included the horsepower rating above the gold logo in the white field, its city of location was in the middle as before, only this time the patent numbers were eliminated (if you look at a decal on a production engine) from the bottom portion of the mast. There were some engines produced until 1977 that used the prior logo from 1948. The Red, White, and Black Logo (1976–present) – This is the company's current logo. The logo has the name BRIGGS STRATTON in black letters on the white midsection of the masthead. The words 4 CYCLE ENGINE are on the red top portion of the mast and the city line MILWAUKEE, WISCONSIN, U.S.A. is written on the black bottom portion of the mast. Although the logo hasn't been changed much since then, the wording on the top and bottom sections of the mast were removed in 1985, although the company continued to use these two sections with the respective wordings ORIGINAL (red section) and SERVICE PARTS (black section) until 1989. Models Cast-iron models 5 (cast iron) (1950–1957) 5S (cast iron; suction carburetor) (1949–1957) 6 (cast iron) (1952–1957) 6S (cast iron; suction carburetor) (1949–1957) 8 (cast iron) (1949–1957) 9 (cast iron) (1949–1962) 14 (cast iron) (1948–1963) 19 (cast iron) (1957–1965) 19D (cast iron) (1963–1965) 23 (cast iron) (1949–1957) 23A (cast iron) (1956–1965) 23C (cast iron) (1961–1963) 23D (cast iron) (1963–1965) 191400 and 193400 (cast iron) (1965–1966) 200400 (cast iron) (1966–1974) 231400 (cast iron) (1965–1966) 233400 (cast iron) (1965–1991) 243400 (cast iron) (1965–1991) 300420 (cast iron) (1966–1971) 301430 (cast iron) (1971–1972) 302430 (cast iron) (1972–1977) 320420 (cast iron) (1969–1971) 325430 (cast iron) (1971–1972) 326430 (cast iron) (1972–1991) Letter series Cast iron block, flathead, with gravity-feed float carb unless otherwise noted A 1933–1948 B 1934-1948 F "Full Power" (suction carb overhead valve) 1921-1922 FB "Full Power" (suction carb overhead valve) 1922-1925 FC "Full Power" (suction carb overhead valve) 1924-1925 FE (suction carb overhead valve) 1925 only FG (overhead valve) 1927 only FH (suction carb; overhead valve) 1925–1933 FHI (float carb overhead valve) 1929 only FI (overhead valve) 1927–1933 FJ-1 (aluminum parts) 1929-1937 used exclusively on military generators FJ-2 cast iron non-military version of FJ-1 (1930-1932) H (1933-1940) I (1938–1949) K 1933-1940 L (suction carb) (1930-1933) Used on washing machines M (1930-1933) N (1940–1954) P (F-head) (1920) PB (F-head) (1924-1935) Q (1925-1933) First flathead model R (1929-1933) S (1920?) S (1930-1933)