yard-man YM90 owners Manual
Issued 11/02
Item
Part No. Description
31 753-04335 Starter Housing Assembly
(includes 23-30 & 32)
32 791-181862 Housing Screw
33 791-182368 Clutch Washer
34 791-182369 Clutch Rotor Assembly
35 791-153592 Clutch Drum Assembly
36 753-1204 Clutch Cover Assembly
(includes 41-44)
37 791-181345 Cover Screw
38 791-182519 Anti-Rotation Screw
39 753-04003 Clamping Screw
40 791-180217 Clamping Nut
41 791-182798 Wire Leads and Sleeve
42 791-611063 Ground Tab
43 753-04337 Module Assembly
44 791-610311B Spark Plug
45 791-182066 Muffler Assembly (includes 47-49)
46 791-182747 Spark Arrestor Screen
47 753-04159 Exhaust Gasket
48 791-147575 Muffler Mounting Bolt Assembly
49 753-04323 Cylinder Assembly (includes 52)
50 753-1207 Piston and Rod Assembly
51 753-1197 Cylinder Gasket
52 791-182723 Cylinder Bolt
* 791-180090 O.E.M. Carburetor Repair Kit (Zama)
* 791-180091 Gasket Diaphragm Repair Kit (Zama)
* 753-1209 Piston Ring Set
* 753-04334 Short Block Assembly
(includes 8, 12, 14, 22, 48, 51-56)
* 791-181599 Clutch Springs (Qty. 2)
* 753-04134 Eng Gasket Kit
* Items Not Shown
37
1
2
3
6
8
10
3
4
5
9
11
13
50
51
12
19
52
17
14
15
16
18
33
34
35
21
22
29
23
24
27
25
32
40
31
20
42
43
49
44
47
45
48
7
ENGINE PARTS - MODEL YM90
2-CYCLE GAS TRIMMER/BRUSHCUTTER
PPN 41ADY90C401
41
38
37
36
46
Item Part No. Description
1 753-1192 Air Cleaner/Muffler Cover Assembly
(includes 2 & 41)
2 791-180350B Air Cleaner Filter
3 791-180351 Carburetor Mounting Screw Assembly
4 753-04227 Choke Extension
5 753-1194 Choke Plate
6 753-04338 Carburetor Assembly (includes 7 & 18)
7 791-610675 Carburetor Gasket
8 791-181860 Carb Mount Screw
9 791-181558 Primer and Hose Assembly
10 791-182063 Carb Mount Assembly (includes 8 & 11)
11 791-684451 Reed Assembly
12 753-1208 Carburetor Mount Gasket
13 753-04332 Crank Case Service Assembly
(includes 10)
14 791-612134 Rear Mounting Pad
15 753-04307 Fuel Tank Assembly (includes 16-18)
16 791-182612 Fuel Cap Assembly
17 791-181168 Fuel Return Line
18 753-04233 Fuel Line Assembly
19 791-145308 Front Mounting Pad
20 791-182064 Shroud Extension and Stand
21 791-182736 Flywheel Assembly
22 791-181065 Spacer
23 753-1199 Recoil Pulley Assembly
24 753-04286 Recoil Spring
25 753-1200 Rope Guide
26 753-04288 Pulley Retainer
27 791-181079 Pull Handle
28 791-613103 Rope
29 753-1201 Pressure Plate Assembly
30 7531202 Plate Screw
30
26
28
37
39
25
26
26
30
27
27
28
32
33
38
36
37
42
35
31
34
34
40
39
35
41
43
1
1
6
15
16
17
18
14
13
11
10
9
12
8
7
2
3
4
5
29
21
20
19
22
23
24
Issued 11/02
BOOM AND TRIMMER PARTS - MODEL YM90
2-CYCLE GAS TRIMMER/BRUSHCUTTER
PPN 41ADY90C401
Item
Part No. Description
1 753-04339 Throttle Housing and Trigger
Assembly (includes 2-4)
2 753-04340 Throttle Trigger Lock-Out
3 791-00058 Throttle Trigger
4 791-182690 Throttle Trigger Spring
5 791-182405 Switch Assembly
6 753-04278 Throttle Cable Assembly
7 791-610327 Harness Clip
8 753-04236 Upper Drive Shaft Housing Assembly
9 791-181099 J-Handle Assembly (includes 10 & 11)
10 791-612831 Grip
11 791-612021 Tube Closure
12 791-683295 Handle Bracket Assembly (includes 13-18)
13 791-181811 Screw
14 791-181812 Upper Handle Clamp
15 791-181813 Middle Handle Clamp
16 791-181814 Lower Handle Clamp
17 791-181815 Nut
18 791-145569 Anti-Rotation Screw
19 791-182928 Click-Link Coupler (includes 20-23)
20 791-182057 Screw
21 791-181617 Bolt
22 791-181618 Adjustment Knob
23 791-181886 Knob Retaining Nut
24 791-180804 Lower Drive Shaft Housing Assembly
25 791-613300 Lower Flexible Drive Shaft
26 791-182200 Shield Mount Screw Assembly
27 791-182193 2 piece Gearbox Assembly (includes 28-30)
28 791-182195 Gearbox Mounting Hardware
29 791-145569 Anti-Rotation Screw
30 791-182196 Blade Driver
31 791-147492 Blade Shield/Shield Mount
32 791-683304 Shield Mounting Screw
33 753-1191 Shield and Blade Assembly (includes 34)
34 791-682061 Blade Assembly
35 791-147490 Retaining Washer
36 791-612483 Spool Shaft
37 791-683301 Outer Spool and Eyelet Assembly
38 791-612026 Retainer
39 791-610636B Spring
40 791-147495 Inner Reel
41 791-180814B Bump Head Knob Assembly
42 791-145873B 4-Tooth Blade
43 791-181699 Nut
* 791-180014B Blade Retaining Kit (includes 35 & 43)
* 791-613226 Locking Rod Tool
* 791-682075B Shoulder Harness
2 Piece Gearbox Assembly Parts – Item 27
44 791-182191 Left Housing
45 791-182192 Right Housing
46 791-182194 Pinion Gear Assembly
47 791-182199 Output Shaft Bushing
48 791-182198 Output Shaft Gear
49 791-182197 Output Shaft Assembly
(includes 46 & 47)
50 753-04348 Palnut
Optional Accessories
* 753-1160 Reel and Line Assembly
* 753-1161 Bump Head Assembly
(includes 36-41)
* 791-682075B Shoulder Harness
* Items Not Shown
47
48
44
28
45
30
29
28
46
49
50
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