IHC-TYPE 'M'
(Page 3 of 3)
Wayne Grenning
November/December 1982
To help collectors of International and McCormick Deering type
'M' engines, included is a procedure on ingition and valve
timing.
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Figure 24 shows a diagram and specific timing marks for valves
and ignition. The following procedure is recommended to adjust
these engines: 1) Turn the flywheels clockwise so that lines
'A' on the flywheel align with 'B' on the
crankcase. 2) The ignitor should be at the immediate point of
tripping as shown with push finger 'E' and ignitor
'F'. 3) At the same time align factory scribe mark
'J' on the magneto bearing with scribe 'I' on the
end of the magneto armature shaft. They can align either way. 4)
Without turning the flywheels, marks 'C' on the
eccentric-plate should be in line with mark 'D' on the side
of the magneto bracket and also with the center of the magneto
shaft. Scribe marks 'I' and 'J' must align
perfectly to allow for the peak electrical current to be in
synchronization with the tripper of the ignitor. (If 'I'
and 'J' do not line up when 'A' on the flywheel is
in line with 'B' on the crankcase, the magneto gear should
be shifted forward or back so that the scribes come in line.)
5)Rotate the flywheels slowly by hand until push finger 'E'
is between 5/32' and 3/16' from the ignitor lever
'F'. (see figure 25) At this time the push finger should be
in the farthest position from 'F'. 6) If an adjustment is
necessary, the trip finger and rod 'E' may be turned one or
more turns after loosening the nut and screw 'C'. If the
above adjustment was necessary then 'A' and 'B'
should be checked again to make sure the spark still occurs at the
proper point. 8) The tripping of the ignitor is adjusted by either
adding or removing shims at 'H'.
In reference to figure 24, the exhaust valve should close when
'B' on the crankcase is in line with 'N' on the
flywheel. Adjustment for this is made by turning pushrod
'L' one or more times either way, after loosening lock nut
'M'. Lengthening the rod allows the exhaust valve to open
earlier.
To further help International 'M' owners with the
identification as to the date of manufacture of engine, a serial
number list of all 'M' engines is supplied.
Research for this writing has been taken from original
International Harvester manuals, catalogs, documents, books, sales
literature, and engine collectors. The possibility for mistakes in
my history of the 'M' engines exists, although I have done
my best to write an accurate article. Correspondence concerning
this article, corrections and the International model 'M'
farm engines will be graciously received. All letters containing
self-addressed, stamped envelopes will be answered.
SERIAL NUMBERS FOR IHC TYPE 'M' ENGINES
1? HP with type 'L' rotary magneto 650 RPM
kerosene | 3 HP with Wico high tension impulse magneto,
kerosene |
1917 | A101 to A1969 |
1918 | A1970 to A19491 |
1919 | A19492 to A42764 | 1924 | BW101 to BW585 |
1920 | A42765 to A70744 | 1925 | BW586 to BW8484 |
1921 | A70745 to A82429 | 1926 | BW8485 to BW16472 |
1922 | A82430 to A85630 | 1927 | BW16473 to BW23229 |
1923 | A85631 to A99317 | 1928 | BW23230 to BW28066 |
1? hp with American Bosch type 'S ' rotary
high tension magneto , 500 RPM gasoline | 1929 | BW28067toBW33204 |
1930 | BW33205 to BW37466 |
1931 | BW37467 to BW38250 |
1932 | BW38251 to BW38433 |
1923 | AA101 to AA5140 | 1933 | BW38434 to BW38440 |
1924 | AA5141 to AA11100 | 1934 | BW38441 to BW39200 |
1? hp with Wico EK high tension impulse magneto
500 RPM gasoline | 1935 | BW39201 to BW39294 |
1936 | BW39295 to BW39326 |
1937 | BW39327 to BW39375 |
1924 | AW101 to AW3227 | 6 HP with low tension type 'R' rotary
magneto kerosene |
1925 | AW3228 to AW23292 | 1918 | C101 to C751 |
1926 | AW23293 to AW43871 | 1919 | C752 to C6872 |
1927 | AW43872 to AW61359 | 1920 | C6873 to C16142 |
1928 | AW61360 to AW73819 | 1921 | C16143 to C20457 |
1929 | AW73820 to AW90719 |
1930 | AW90720 to AW100259 |
1931 | AW100260 to AW106866 | 1922 | C20458 to C25767 |
1932 | AW106867 to AW111502 | 1923 | C25768 to C31468 |
1? HP with American Bosch 'S' rotary 1 high
tension magneto, 500 RPM, kerosene | 1924 | C31469 to C34574 |
6 HP with high tension American Bosch 'S'
rotary magneto, kerosene |
1924 | C34575 to C34729 |
1925 | C34730 to C34823 |
1923 | AB101 to AB152 | 1926 | C34824 to C34970 |
1924 | AB153 to AB1060 | 1927 | C34971 to C34993 |
1925 | AB1061 to AB1785 | 1928 | C34994 to C35025 |
1926 | AB1786 to AB1879 | 1929 | C35026 to C35034 |
1927 | AB1880 to AB1922 | 1930 | C35035 to C35057 |
1928 | AB1923 to AB2005 | 1931 | C35058 to C35067 |
1929 | AB2006 to AB2030 | 1932 | C35068 to C35071 |
1930 | AB2031 to AB2038 |
1931 | AB2039 to AB2045 | 1934 | C35072 to C35074 |
1932 | AB2046 to AB2047 | 6 HP with Wico EK high tension impulse magneto,
kerosene |
1? HP with Wico EK high tension magneto, 500 RPM
kerosene |
1924 | AX101 to AX529 | 1925 | CW101 to CW2296 |
1925 | AX530 to AX3406 | 1926 | CW2297 to CW7101 |
1926 | AX3407 to AX5343 | 1927 | CW7102 to CW11201 |
1927 | AX5344 to AX7451 | 1928 | CW11202 to CW14400 |
1928 | AX7452 to AX10273 | 1929 | CW14401 to CW17971 |
1929 | AX10274 to AX13177 | 1930 | CW17972 to CW19988 |
1930 | AX13178 to AX16091 | 1931 | CW19989 to CW20632 |
1931 | AX16092 to AX16332 | 1932 | CW20633 to CW21202 |
1932 | AX16333 to AX16473 | 1933 | CW21203 to CW21207 |
1933 | AX16474 to AX16539 | 1934 | CW21208 to CW21470 |
3 HP with low tension type 'L' rotary magneto,
kerosene | 1935 | CW21471 to CW21782 |
1918 | B101 to B3037 | 1936 | CW21783 to CW21854 |
1919 | B3038 to B15812 | 1937 | CW21855 to CW21960 |
1920 | B15813 to B37585 | 10 HP with type OL and U low tension oscillating
magnetos, kerosene |
1921 | B37586 to B42782 |
1922 | B43783 to B45950 |
3 HP with high tension American Bosch magneto,
kerosene | 1920 | D101 to D1389 |
1922 | B45951 to B49812 | 1921 | D1390 to D2748 |
1923 | B49813 to B59659 | 1922 | D2749 to D3075 |
1924 | B59660 to B64818 | 1923 | D3076 to D3929 |
1925 | B64819 to B65031 | 1924 | D3930 to D3954 |
1926 | B65032 to B65393 | 1925 | D3955 to D4227 |
1927 | B65394 to B65321 | 1926 | D4228 to D4679 |
1928 | B65322 to B65361 | 1927 | D4680 to D4782 |
1929 | B65362 to B65380 | 10 HP with high tension American Bosch rotary magneto ,
kerosene |
1930 | B65381 to B65385 | 1928 | D4783 to D4861 |
1931 | B65386 to B65391 | 1929 | D4862 to D4980 |
1932 | B65392 | 1930 | D4981 to D5051 |
| | 1931 | D5052 to D5068 |
| | 1932 | D5069 to D5081 |
| | 1933 | D5082 to D5100 |
| | 10 HP with high tension Wico EK impulse magneto,
kerosene |
| | 1927 | DW157 to DW671 |
| | 1928 | DW672 to DW847 |
| | 1929 | DW848 to DW1183 |
| | 1930 | DW1184 to DW1330 |
| | 1931 | DW1331 to DW1401 |
| | 1932 | DW1402 to DW1425 |
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