Briggs & Stratton Manufacturing Date Listing (Q -- ZZ)

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This page contains information for engine Models Q thru ZZ, if your engine Model lies in this range, move down the page until you see your model series. The serial number shown under the Month and Year is the last serial number built in that month. If your engine Model is A thru PC go to page 1 of this listing. If your engine Model is 5 thru 23 go to page 3 of this listing.

Engines are listed in alphabetical order

 MODEL SERIES Q   L-HEAD, 2.75" BORE, 3.25" STROKE

    YEAR      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP      OCT      NOV      DEC
    1925                                                                                                110      120
    1926      124      146      186      210      222      247      254      280      292      407      421      483
    1927      509      519      599      689      989     1130     1224     1355     1424     1534     1605     1687
    1928     2019     2394     2645     2961     3272     3494     3787     3976     4117     4209     4339     4689
    1929     4961     5226     5508     5986     6326     6655     6935     7021     7174     7399     7532     7625
    1930     7773     7867     8201     8399     8523     8615     8665     8712     8779     8808     8821     8848
    1931                       8868     8924     8943     8961     8973     8990     8998     9010     9013
    1932              9016     9019     9020     9023     9026                                9027
    1933              9028              9030     9038                       9039                       9042

 MODEL SERIES R, RA, R2, & RC   L-HEAD, 2.75" BORE, 3.25" STROKE

    YEAR      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP      OCT      NOV      DEC
    1929                             100                            102      104      114      160      200      239
    1930      514      767      955     1059     1351     1462     1579     1653     1823     1899     2240     2419
    1931     2699     2999     3233     3374     3679     3940     4011     4173     4193     4312     4345     4407
    1932     4629     4716     5031     5149     5220     5412     5468     5530     5584     5656     5702     5714
    1933     5742     5754     5797     5812     5823     5627     5834     5840     5841     5842

 MODEL SERIES R1, & RH   L-HEAD, 2.75" BORE, 3.25" STROKE

    YEAR      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP      OCT      NOV      DEC
    1929      101
    1930                        103      104                        106      110                                 112
    1931      125      127      139      180      182                                         199
    1932      200      201      203      209      216      220

 MODEL SERIES S [ALL VERSIONS]  L-HEAD, 2.25" BORE, 2.25" STROKE

    YEAR      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP      OCT      NOV      DEC
    1930                                                   100      109      183      379      566               767
    1931      924      943     1041     1202     1361     1440     1558     1623              1771     1830     1875
    1932              1892     1935     1947     1952     2001     2074     2104     2147     2159     2169     2182
    1933     2190     2194     2204     2221     2222                       2224                       2225

 MODEL SERIES T [ALL VERSIONS]  L-HEAD, 2.25" BORE, 2.25" STROKE

    YEAR      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP      OCT      NOV      DEC
    1930                                                                     106      108      110      116      152
    1931      851                       1237     1311

 MODEL SERIES U [ALL VERSIONS]  L-HEAD, 2.00" BORE, 2.00" STROKE

    YEAR      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP      OCT      NOV      DEC
    1940                                                                              105               111      115
    1941      368     1208     3135     3552     4203     5080     5270     5437     5844     5962     7100    11386
    1942    12863    12920    12975    13301    13520    13827    13829    13830    13863    13943    13953    13963
    1943    13979    14024    14028    14671             14872                                        15071    15371
    1944             16572             16872    17372    17973    18264    18664    22249    22433    23522    25532
    1945    25882             26121             26359    27672                                        29672    30991

 MODEL SERIES W & WA  L-HEAD, 2.75" BORE, 3.25" STROKE

    YEAR      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP      OCT      NOV      DEC
    1931                                                   108      109      110      368      750     1119     1128
    1932     1131     1138     1145     1156     1157     1158     1218     1221     1231     1236     1238     1239
    1933     1242              1245     1247     1252

 MODEL SERIES WMG  L-HEAD, 2.00" BORE, 1.50" STROKE

    YEAR      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP      OCT      NOV      DEC
    1937                                                  1190     2987     3968     5269     5654     6186     6824
    1938     7284     7508     8195     8447     8468     8553     8727     8809     8843     8861     8930     8962
    1939     9028     9083     9085              9123     9126     9138
    1941     9198     9206     9207              9208     9216     9221              9224     9234
    1942     9238     9242
         
 MODEL SERIES WI, WR, & WMB   L-HEAD, 2.00" BORE, 1.50" STROKE

    YEAR      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP      OCT      NOV      DEC
    1938                                                                                      6178     8911    11858
    1939    17085    24912    36322    43403    49477    56016    61978    69193    74577    75485    86659    96859
    1940   102241   110866   123474   131834   140045   143721   147580   153157   159297   165240   171683   179017
    1941   190287   201016   213184   225278   237788   252442   261020   272106   280498   293122   304649   316332
    1942   327862   338205   348318   349249   350981   351469   351690   352154   352164   352545   352560   353089
    1943   353230   353240   353262   354646   354983   355416                              355624   355938   355939
    1944                              355942            355947   355962   355963   357299   358048            358152
    1945   360133   360619   363284   366256   369635   371255   372150   373330   374264   380265   387123   393569
    1946   405680   423588   433126   433776   454592   466486   482022   488599   505095   511255   538679
    1947   564403   577613   591177   617639   624217   638739   651466   666943   684882   703879   720237   731859
    1948   752844   773944   795949   831713   839716   855496   875336   891642   921732   945572   968182   990614
    1949  1029803  1058258  1088445  1118300  1140097  1159006  1165312  1167925  1172593  1172610  1173871  1174570
    1950  1174874  1176817  1177144  1178229  1179774  1178774  1181192  1183892  1183994           1185420  1186429
    1951  1186563  1187433  1187434  1190820  1190852  1191482                    1191632  1192813  1193249  1193663
    1952  1194224  1195154           1196127  1196761  1197134  1197901           1198315  1199127  1199834  1200650
    1953  1201527  1202349  1203350  1204668  1205561  1207031  1208064  1208690  1210222  1210815  1212526  1212796
    1954  1214264           1214839  1215335  1215829           1216860  1217286  1217914  1218066  1218938  1219315
    1955  1220357  1220579  1221143  1221571  1222446  1222933  1223606  1224922  1225547  1226674  1227223  1228154
    1956  1229630  1229631  1230287  1231053  1231653  1232793  1233390  1233932  1234732  1236343  1237988  1240316
    1957  1240446

 MODEL SERIES WM, & WMI   L-HEAD, 2.00" BORE, 1.50" STROKE

    YEAR      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP      OCT      NOV      DEC
    1936                                                                     250     3375     9365    16500    24196
    1937    36315    36853    49764    71627    87748   106549   113081   117497   125458   130504   131023   134170
    1938   138129   143965   151808   159320   169349   175561   179337   189123   195742   196211   196535   196554
    1939   196631   196676   196693   196711   196727   196740                              196761   196935   196938
    1940                                                196944            196955   196965   196966   196971   197021
    1941   197081   197103   197135            197145   197190   197255                             197246

 MODEL SERIES Y [ALL VERSIONS]   L-HEAD, 2.25" BORE, 2.25" STROKE

    YEAR      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP      OCT      NOV      DEC
    1931                                                                     101      102      103      294      933
    1932     1671     2542     3150     3530     5579     6179     6853     7900     8970     9550    11230    11515
    1933    12393    14112    16299    17780    20618    23377    27089    31985    39573    45163    47454    48886
    1934    51483    55062    60816    66792    73813    81108    82987    85438    91335    96539   100634   104260
    1935   111016   120400   130914   148843   158185   167003   177664   189162   200355   212350   216270   222867
    1936   234728   246310   252916   263458   271810   280319   293466   310866   321104   326473   329466   330889
    1937   330542   330776   332303   332716   333245   333758   333965   334869   335270   335295   335748   336084
    1938   336621   336629            337672   338184   338195   338211            338232   338241
    1939   338245   338255                                                         338288
    1940                                       338332

 MODEL SERIES Z & ZZ  [ALL VERSIONS]   L-HEAD, 3.00" BORE, 3.25" STROKE

    YEAR      JAN      FEB      MAR      APR      MAY      JUN      JUL      AUG      SEP      OCT      NOV      DEC
    1931                                                                     101      102      109      114      122
    1932      126      154      167      245      277      303      348      356      388      407      424      432
    1933      446      466      530      544      668      699      724      805      908     1000     1053     1128
    1934     1196     1221     1449     1580     1775     1861     1958     2032     2122     2177     2216     2254
    1935     2372     2426     2560     2826     3087     3358     3446     3526     3585     3671     3713     4085
    1936     4332     4603     4863     5333     5896     6233     6436     6564     6686     6795     6870     7196
    1937     7538     7987     8603     9427    10159    10920    11266    11560    11670    11809    11892    11956
    1938    12136    12266    12546    12918    13224    13440    13557    13667    13743    14284    14384    14527
    1939    14631    14765    15283    15678    15979    16223    16469    16739    16932    17057    17271    17602
    1940    18210    18697    19234    19967    20670    21023    21336    21794    22063    22334    22715    23156
    1941    23999    25037    26286    27453    28770    29855    31058    32488    33777    33813    35218    35720
    1942    36445    37416    39350    43743    46548    52853    59614    67563    74168    78039    81827    86844
    1943    90639    95276   100842   107585   113307   118769   123931   130896   137348   142337
    1944   155595   161174   167645   174170   180125   186548   192014   196158   201264   206225   211815   217852
    1945   221621   227409   231869   236408   241782   246962   249924   253900   259989   262829   264544   265819
    1946   267567   269011   270766   271909   273940   275783   277302   278373   280115   282403   284884
    1947   288426   290407   292882   297652   300742   304450   307513   310785   314335   319793   321932   326809
    1948   330682   333044   336646   341034   344435   345927   347870   351598   355426   357560   359412   361074
    1949   361083                     361093                                       361098   361103
            
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