For Discount Tecumseh Engine Parts Call 606-678-9623 or 606-561-4983
LAV40-50399J Page 1 of 8
Engine Parts List #1
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LAV40-50399J Page 2 of 8
Engine Parts List #1
Ref # Part Number Qty Description
1 33027B Cylinder (Incl. 2, 8, 9 & 20) (2-5/8" Bore)
2 26727 Pin, Dowel
6 33734 Element, Breather
7 34214A Breather Assy. (Incl. 6, 8, 9 & 12)
8 33735 * Gasket, Breather
9 30200 Screw, 10-24 x 9/16"
12 33886 Tube, Breather
14 28277 Washer, Flat
15 30589 Rod, Governor (Incl. 14)
16 32651 Lever, Governor
17 31335 Clamp, Governor lever (Clamp is positioned towardsspark
plug end on 1977-78 and latermodels. It is positioned
opposite spark plugend on earlier models.)
18 650548 Screw, 8-32 x 5/16"
19 31386 Spring, Governor
20 32600 Seal, Oil
30 34477B Crankshaft
32 32323 Washer, Thrust
40 34851 Piston, Pin & Ring Set (Std.) (2-5/8" Bore)
40 34852 Piston, Pin & Ring Set (.010" OS)
40 34853 Piston, Pin & Ring Set (.020" OS)
41 32603B Piston & Pin Ass'y.(Std.)(Incl. 43)(2 -5/8")
41 32604B Piston & Pin Ass'y. (.010" OS) (Incl. 43)
41 32605B Piston & Pin Ass'y. (.020" OS) (Incl. 43)
42 34854 Ring Set (Std.) (2-5/8" Bore)
42 34855 Ring Set (.010" OS)
42 34856 Ring Set (.020" OS)
43 20381 Ring, Piston pin retaining
45 32875 Rod Assy., Connecting (Incl. 18)
46 32610 Connecting Rod Bolt (Early Production )
46 32610A Bolt, Connecting rod
46A 32609 Plate, Lock (Do not use with 32610A locking type screw)
48A 27241 Lifter, Intake valve
48 27241 Lifter, Exhaust valve
50 33154 Camshaft
52 29914 Pump Assy., Oil
60 29745 Extension, Blower housing
64 30063 Screw, Torx T-30, 1/4-20 x 1/2"
64A 8345 Flatwasher, 1/4"
66 30063 Screw, Torx T-30, 1/4-20 x 1/2"
69 35261 * Gasket, Mounting flange
70 32696B Flange Ass'y. (Incl. 72, 75, 80, 306 & 311)
72 30572 Plug, Oil drain (Incl. 73)
72A 9556 Oil Drain Plug (Use as required)
73 28833 * Drain Plug Gasket (Do not use w/plast ic plug)
75 27897 Seal, Oil
80 30574 Shaft, Mechanical governor
81 30590A Washer, Flat
82 30591 Gear Assy., Governor (Incl. 81)
83 30588A Spool, Governor
84 29193 Ring, Retaining
86 650488 Screw, 1/4-20 x 1-1/4"
89 610961 Key, Flywheel
92 650815 Washer, Belleville
93 650816 Nut, Flywheel
101 610118 Cover, Spark plug
103 650489 Screw, 1/4-20 x 5/8"
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LAV40-50399J Page 3 of 8
Engine Parts List #1
Ref # Part Number Qty Description
110 34231 Ground Wire
119 33015A * Gasket, Cylinder head
120 33016A Head, Cylinder (Incl. 131)
125 32644A Intake Valve (STD)(Incl.151) (Inverte d Ports)
125 32645A Intake Valve (1/32" OS)(Incl.151) (Inverted Ports)
126 29313C Exhaust Valve (STD)(Incl. 151) (Inverted Ports)
126 29315C Exhaust Valve (1/32" OS)(Incl. 151) (Inverted Ports)
127 26073 Washer (Not used in late production)
127 650691 Washer (Used on late production)
130 6021A Screw, 5/16-18 x 1-1/2" (Use as requi red)
130 650818 Screw, 5/16-18 x 1-1/2" (Use as requi red)
131 650694A Screw, 5/16-18 x 2" (Use as required)
131 650697A Screw, 5/16-18 x 2-1/2" (Use as requi red)
135 34251 Resistor Spark Plug (RJ17LM)
149 31671 Valve Spring Cap) (Used in early prod uction)
150 31672 Spring, Valve
151 31673 Cap, Lower valve spring
169 27234A * Gasket, Valve spring cover
174 650128 Screw, 10-24 x 1/2"
178 29752 Nut & Lockwasher, 1/4-28
179 30593 Clip, Magneto wire
181 6201 Screw, 1/4-28 x 7/8"
182 6201 Screw, 1/4-28 x 7/8"
184 26756 * Gasket, Carburetor
185 32650 Pipe, Intake
186 34337 Link, Governor spring
200 32181A Control Bracket (Incl. 203, 204 & 206 )
203 31342 Spring, Compression
204 650549 Screw, 5-40 x 7/16"
206 610973 Terminal Assy.
207 34336 Link, Governor-to-throttle
209 30200 Screw, 10-24 x 9/16"
210 27793 Clip, Conduit
211 28942 Screw, 10-32 x 3/8"
223 650664 Screw, 1/4-20 x 1-19/32"
224 32649A * Gasket, Intake
239 34338 * Gasket, Air cleaner
240B 33005 Body, Air cleaner
246B 33006 Element, Air cleaner
248 33008 Tube, Air cleaner
250A 33007 Cover, Air cleaner
260 33738D Blower Housing NOTE: Replacement hardware may differ
when servicing starter assy. or blower housing. Refer to
Service Bulletin 508.
261 650561 Screw, 1/4 20 x 5/8"
274 26754A * Gasket, Exhaust
275 35771 Muffler (Incl. 274)
277 30063 Screw, Torx T-30, 1/4-20 x 1/2" (Use as req.)
285A 34694 Cup, Starter
286 33668 Screen, Starter cup
287 29716 Screw, 1/4-28 x 7/16" (Use as require d)
287 30513 Screw & Lockwasher, 1/4-28 x 1/2"
287 Pop Rivet (Purchase locally) (3/16" d ia.)
287A 29752 Nut & Lockwasher, 1/4-28 (Use as requ ired)
290 29774 Fuel Line(Braided 8-1/4")(21 cm)(Use as req.)
290 34357 Fuel Line (Epichlorohydrin 6-3/4") (1 7 cm)
290 30705 Fuel Line (Braided 16")(40 cm)(Use as req.)
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LAV40-50399J Page 4 of 8
Engine Parts List #1
Ref # Part Number Qty Description
292 26460 Fuel Line Clamp (Use as required)
300 32671 Fuel Tank (Incl. 292 & 301)
301 410144B Fuel Cap (Std.) (Use as required)
301 33032 Fuel Cap (Use as required)
301 34210 Fuel Cap (use as required)
305 34318 Oil Fill Tube
313 33876 Gasket, Stator
325A 27275 Clip, Hi-tension wire (Use as require d)
341 35016 Bracket, Tank
342 650665 Screw, 1/4-15 x 7/8"
342A 650735 Screw, 10-24 x 3/8"
370 34346 Decal, Instruction
370A 550223 Name & Instruction Decal
375 611025 Magneto NOTE: This magneto is not available as an
assembly. The magneto number is shown for reference
purposes only. Order component parts individually, as
shown in parts breakdown. Refer to Division 5, Section B,
page39 or Fiche 6, Grid G-14 for breakdown)
377 30547A Contact Assy., Breaker
378 30548B Condenser
379 631021 Inlet Needle, Seat & Clip Assy.
380 631597 Carburetor (Incl. 184) Refer to Division 5, SectionA, page 104
or Fiche 6, Grid E-1 for breakdown)
390 590420A Rewind Starter NOTE: Replacement hardware may differ
when servicing starter assy. or blower housing. Refer to
Service Bulletin 508. (Refer to Division 5, Section C, page 25
or Fiche 6, Grid G-3 for breakdown)
400 33238D * Gasket Set (Incl. items marked *)
420 730225 SAE 30 4-Cycle Engine Oil (Quart)
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LAV40-50399J Page 5 of 8
Engine Parts List #2
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LAV40-50399J Page 6 of 8
Engine Parts List #2
Ref # Part Number Qty Description
19 31386 Spring, Governor
32 32323 Washer, Thrust
92 650815 Washer, Belleville
93 650816 Nut, Flywheel
182 6201 Screw, 1/4-28 x 7/8"
261 650561 Screw, 1/4 20 x 5/8"
262 650831 Screw, 1/4-20 x 15/32"
287 29716 Screw, 1/4-28 x 7/16" (Use as require d)
287 30513 Screw & Lockwasher, 1/4-28 x 1/2"
287 Pop Rivet (Purchase locally) (3/16" d ia.)
305 34318 Oil Fill Tube
306 34265 Gasket, Oil fill tube
306 34282 "O" Ring (This "O" ring is required with metal fill tube only
when replacement mounting flange with .777 dia. oil fill hole
has been used.)
307 33590 "O" Ring
309 650562 Screw, 10-32 x 1/2"
310 34319 Dipstick (Incl. 307)
370 34346 Decal, Instruction
370A 550223 Name & Instruction Decal
379 631021 Inlet Needle, Seat & Clip Assy.
1175 590441 Bracket Ass'y. (Use as required)
1176 650639 Open End Rivet (Use as required)
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LAV40-50399J Page 7 of 8
Engine Parts List #3
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LAV40-50399J Page 8 of 8
Engine Parts List #3
Ref # Part Number Qty Description
19 31386 Spring, Governor
32 32323 Washer, Thrust
169 27234A * Gasket, Valve spring cover
172 32755 Cover, Valve spring box
174 650128 Screw, 10-24 x 1/2"
182 6201 Screw, 1/4-28 x 7/8"
243 650806 Screw, 10-32 x 5/8"
262 650831 Screw, 1/4-20 x 15/32"
274 26754A * Gasket, Exhaust
277A 650774 Screw, 1/4-20 x 2-3/8"
277 30063 Screw, Torx T-30, 1/4-20 x 1/2" (Use as req.)
287 29716 Screw, 1/4-28 x 7/16" (Use as require d)
287 30513 Screw & Lockwasher, 1/4-28 x 1/2"
287 Pop Rivet (Purchase locally) (3/16" d ia.)
290 29774 Fuel Line(Braided 8-1/4")(21 cm)(Use as req.)
290 34357 Fuel Line (Epichlorohydrin 6-3/4") (1 7 cm)
290 30705 Fuel Line (Braided 16")(40 cm)(Use as req.)
292 26460 Fuel Line Clamp (Use as required)
305 34318 Oil Fill Tube
415 730162 Muffler Adapter Kit (Incl. 274 & 277A ) (Inverted Ports)
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