Models 290400-294400-303400-304400 - Small Engine Suppliers
Models 290400-294400-303400-304400 - Small Engine Suppliers
Models 290400-294400-303400-304400 - Small Engine Suppliers
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HORIZONTAL CRANKSHAFTENGINES<strong>Models</strong> <strong>290400</strong>-<strong>294400</strong>-<strong>303400</strong>-<strong>304400</strong>Fig-1 BASICFig-2Fig-3Fig-4807589 BLO 807588 BLOFig-5Fig-6807590 BLOFig-7807745 BLOFig-8807806 BLOFig-9807849 BLOFig-10807851 BLOFig-11808000 BLOFig-12808056 BLOFig-13Fig-14Fig-15Fig-16Fig-17Crankshaft Identification List77Form MS-4792-01/02
<strong>Models</strong> <strong>290400</strong>-<strong>294400</strong>-<strong>303400</strong>-<strong>304400</strong>HORIZONTAL CRANKSHAFTENGINESFig-1 BASIC.5511.043.8071.6531.174.416THROW 1.2994.7172.9052.362.984.984DIA.Fig-22.5442.843.3341.00.472.511KEYSLOT .2361.18 DIA.1.377 DIA..61021.456DIA.1.377DIA.KEYWAY .250SAE 3/8-24UNF-2B1.00-14UNS-2A R.H.THREADS692161 BLRE 692162 BLREFig-36.083.326.9448.413Fig-43.6033.06KEYWAY .23561.792Fig-56.083.3261.25.999.413SAE 5/16-24UNF-2B.9842M12-1.25 THD.SAE 3/8-24UNF-2B692163 BLRE692165 BL692166 BLFig-6Fig-7Fig-84.5681.0232.3811.25.9991.8121.921.372.883.1881.45.492.59SAE 5/16-24UNF-2B692167 BLRE692168 BLE1.25-12UNF-2AR.H. THREADS692169 BLRFig-9Fig-10Fig-112.361.124DIA.3.92.361.51.814.131.06.511SAE 7/16-20 UNF-2B808740 BLRESAE 7/16-20UNF-2B808975 BLFig-12 BASIC1.043.807.5511.6531.174.416THROW 1.2996.0323.1492.3621.22.984DIA.Fig-13KEYSLOT .2361.18 DIA.1.377 DIA..61021.456DIA.1.377DIA.KEYWAY .250SAE 7/1620UNF-2B692159 PLERFig-14Fig-15Fig-16Form MS-4792-01/02Crankshaft Identification List78
HORIZONTAL CRANKSHAFTENGINES<strong>Models</strong> 300400-301400-302400-320400-325400-326400Fig-1 BASICFig-2Fig-3Fig-4260969 (NLA)261212 (NLA) 260999 BFig-5Fig-6261110 BFig-7261131 (NLA)691797 BFig-8261154 (NLA)261225 BFig-9261160 (NLA)690534 BFig-10261162 (NLA)Fig-11261163 (NLA)690536 BFig-12261169 (NLA)690535 BFig-13261170 (NLA)261221 BFig-14261181 (NLA)261222 B261219 B690537 B261408 (NLA)Fig-15Fig-16Fig-17690543 B 691806 B261944 BCrankshaft Identification List79Form MS-4792-01/02
<strong>Models</strong> 326400HORIZONTAL CRANKSHAFTENGINESFig-1 BASICFig-2Fig-3Fig-4261355 (NLA) 690540 BRFig-5Fig-6 BASIC690541 BR690546 BFig-7Fig-8Fig-9261228 (NLA)Fig-10261255 (NLA)Fig-11Fig-12Fig-13Fig-14Fig-15Fig-16Form MS-4792-01/02Crankshaft Identification List80
To determine the part number of a crankshaft, comparethe crankshaft with the illustrations shown forthe specified engine Model Series. Basic areaswhere dimensions are called-out in the illustrationsare shown at right.CRANKSHAFT IDENTITYMAGNETOSIDETHROWCRANKPIN DIA.POWERTAKE-OFFSIDEHELICAL TEETHSPUR TEETHCrankshaft illustrations are grouped by model seriesand crankshaft orientation. Each group contains oneor more complete illustrations of a standard crankshaftboxed by bold lines, and labeled as BASIC.Any crankshafts which are dimensionally the sameas the BASIC are displayed directly following, withonly the dimensions that are different shown.Fig-6 BASIC.53502.8842.7042.1231.38053.15THROW .9383.76KEYSLOTS.1561.3801.060Fig-74.478.625-18UNF-2A.438.1872 .8746 .8735.8735 KEYWAYDIA. DIA.DIA. .1872262269 (NLA).375-24 UNF-2B 493025 PVO261080 (NLA)261439 (NLA)399485 PBRKSD492457 PBROSDTo order the crankshaft, the service number is located in the lower right hand corner of each box. If there is morethan one service number listed, the part has been superseded. Review the other part number(s) listed. Check theabbreviations behind the number to determine the correct crankshaft.LEGEND OF ABBREVIATIONSThe suffix following the part number indicates:B = Ball bearing, power take-off side.D = Deep cover used with flange mount ball bearing or flange mount plain bearing and gear reductionengines.E = Electric starter engine.F = Ball bearing, magneto side.G = Gear reduction.J = Special crankshaft counterweight.K = With plunger flat - fixed or loose timing gear included.(NOTE: if no plunger flat, Magnetron ® module might be included.)L = Pressure lubrication.M = No plunger flat - timing gear not required (2-cycle) or loose timing gear not included - Magnetron ®module not included.N = Needle bearing, magneto side.(NLA) = Crankshaft is illustrated for identification, but this part number is no longer available from factory.See illustrations for possible replacement.O = No plunger flat - fixed or loose timing gear included - Magnetron ® module not included.P = Plain bearing.R = Rewind starter engine.S = Standard plain bearing cover.V = Vertical pull starter engine.Y = With plunger flat - loose timing gear not included.The dimension from end of crankshaft to dotted line indicates the distance from the end of the crankshaft to:(a) Oil seal on plain bearing horizontal crankshaft engines.DOTTED LINE(b) Mounting face of sump on vertical crankshaft engines.(c) Flange mounting face on horizontal crankshaft engines.NOTE: All crankshaft power take-off tapers are,unless noted, 2-1/4 inches per foot.DIM.
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