MTD YM300 User manual

Issued 8/02
ENGINE PARTS - MODEL YM300
2-CYCLE GAS TRIMMER
PPN 41ADY30G401
Item Part No. Description
1791-182059 Air Cleaner/Muffler Cover Assembly
(includes 2 & 36)
2791-180350 Air Cleaner Filter
3791-180351 Carburetor Mounting Screw Assembly
4791-180226 Wavey Washer
5753-1182 Choke Lever Assembly (includes 6)
6753-1183 Choke Knob and Screw
7753-1184 Choke Lever and Plate (includes 5 & 6)
8753-04144 Carburetor Assembly (includes 9 & 20)
9791-610675 Carburetor Gasket
10 791-181860 Carb Mount Screw
11 753-1185 Primer and Hose Assembly
12 753-1196 Carb Mount Assembly (includes 10, 13 & 14)
13 791-684451 Reed Assembly
14 753-1208 Carburetor Mount Gasket
15 791-181865 Crank Case Service Assembly
(includes 10 & 23)
16 791-612134 Rear Mounting Pad
17 791-181152 Fuel Tank Assembly (includes 18-20)
18 753-1187 Fuel Cap Assembly
19 791-181168 Fuel Return Line
20 791-682039 Fuel Line Assembly
21 791-145308 Front Mounting Pad
22 791-153520 Shroud Assembly (includes 23)
23 791-181861 Shroud Screw
24 791-182064 Shroud Extension & Stand (includes 36)
25 791-182736 Flywheel Assembly
26 791-610303 Square Nut Drive
27 753-04232 Recoil Pulley Assembly
28 791-613102 Recoil Spring
29 791-611061 Rope Guide
Item Part No. Description
30 791-181441 Pulley Retainer Assembly
31 753-04241 Switch Assembly (includes 38)
32 791-181079 Pull Handle
33 791-613103 Rope
34 753-04244 Starter Housing Assembly
(includes 27-33, 35, 36 & 38)
35 791-181862 Housing Screw
36 791-181345 Cover Screw
37 791-153597 Upper Clamp Assembly
38 753-04242 Wire Lead
39 753-04245 Module Assembly (includes 49)
40 791-610311 Spark Plug
41 753-04159 Exhaust Gasket
42 791-182066 Muffler Assembly (includes 41, 43 & 48)
43 791-147575 Muffler Mounting Bolt Assembly
44 753-1206 Cylinder Assembly (includes 46 & 47)
45 753-1207 Piston and Rod Assembly
46 753-1197 Cylinder Gasket
47 791-182723 Cylinder Bolt
48 791-182747 Spark Arrestor
49 791-611063 Ground Tab
*753-04134 Engine Gasket Kit
*791-180602 O.E.M. Carburetor Repair Kit (Walbro)
*791-181069 Gasket Diaphragm Repair Kit (Walbro)
*753-1209 Piston Ring
*753-04173 Short Block Assembly
(includes 10, 15, 23, 40, 44-47)
*Items Not Shown
36
12
38
10
12
34
5
7
6
11
13
14
15 45
46
21
47
19
16 17 18
20
25 26 27 30 31
29
32
33
35
36 37
34
24
38
39
44
40
41
42
43
23
28
22
9
49
48

Issued 8/02
BOOM AND TRIMMER PARTS - MODEL YM300
2-CYCLE GAS TRIMMER
PPN 41ADY30G401
Item Part No. Description
1791-182093 Throttle Housing and Trigger Assembly
(includes 2 & 3)
2791-610314 Throttle Trigger Spring
3791-181556 Throttle Trigger
4791-182068 Throttle Cable Assembly
5791-153064 D-Handle Assembly (includes 6)
6791-153317 D-Handle Hardware
7791-181893 Drive Shaft Housing Assembly
8791-153597 Lower Clamp Assembly (includes 12)
9753-04280 Flexible Drive Shaft
10 791-180531 Shield Mounting Screw
11 791-181784 Bushing Housing Assembly w/Spool Shaft
(includes 16)
12 791-145569 Anti-Rotation Screw
13 791-181659 Shield and Blade Assembly (includes 14)
14 791-181823 Blade Assembly
15 791-153619 Outer Spool and Eyelet Assembly
(includes 16)
16 791-610660 Retainer
17 791-610317B Spring
18 791-610318 Inner Reel
19 791-153066B Bump Head Knob Assembly
Optional Accessories
*791-610375B Replacement Line, 0.80 Diameter
*791-153577B Reel and Line Assembly
*791-180897B Bump Head Assembly (includes 15-19)
*791-682075B Shoulder Strap Assembly
*Items Not Shown
10
8
13
9
17
16
18
19
15
11
12
14
1
1
5
6
7
4
3
2