Parts Diagram | ## | Part # | Description | Qty | Notes |
| 0437341 | 0437341 | Cylinder & crankcase assembly. not shown 40 models | 1 | |
0437342 | 0437342 | Cylinder & crankcase assembly. not shown 50 models | 1 | |
1 | 0304178 | Dowel pin, bearing | 2 | |
2 | 0314616 | Stud, cylinder to adapter | 1 | |
3 | 0305070 | Taper pin | 1 | |
4 | 0308747 | Screw, crankcase to cylinder | 2 | |
5 | 0308752 | Screw, main bearing, upper & lower | 4 | |
6 | 0308742 | Screw, crankcase to cylinder | 8 | |
7 | 0331894 | Elbow, indicator | 1 | |
8 | 0303492 | Nipple, pulse | 1 | |
9 | 0336178 | Housing, thermostat | 1 | |
10 | 0435957 | Diaphragm & cup assembly | 1 | |
11 | 0436195 | Thermostat assembly | 1 | |
12 | 0329830 | Gasket, cover, thermostat | 1 | |
13 | 0306049 | Screw, cover, thermostat | 4 | |
14 | 0314515 | Screw, lift bracket | 1 | |
15 | 0325211 | Gasket, water passage | 1 | |
16 | 0437506 | Cover & plug assembly, water passage | 1 | |
17 | 0321164 | Plug, cover | 2 | |
18 | 0437929 | Spark plug, Champion, QL78YC | 2 | |
18 | 0432981 | Spark plug, Champion, QL78C. optional | 2 | |
18 | 0772342 | Spark plug, Champion, QL78C-SS. stainless steel | 2 | |
19 | 0316355 | Nut, stud | 1 | |
20 | 0335359 | Gasket, cylinder head | 1 | |
21 | 0332406 | Pin, roll, mount | 4 | |
22 | 0339540 | Cylinder head, all 40 models | 1 | |
22 | 0340100 | Cylinder head, all 50 models | 1 | |
23 | 0585184 | Temperature switch. electric models | 1 | |
24 | 0511469 | Terminal, pin | 1 | |
25 | 0329562 | Cover, temperature switch | 1 | |
26 | 0513357 | Connector | 1 | |
27 | 0330143 | Stud, double ended | 1 | |
28 | 0328701 | Washer, stud | 2 | |
29 | 0328740 | Nut | 2 | |
31 | 0 | Hose, indicator, 18 3/4 in. 480MM. cut to length from p/n 310828 -- 25 ft. 76M roll | 1 | |
33 | 0326023 | Lift ring | 1 | |
34 | 0303630 | Washer, plug | 1 | |
35 | 0330057 | Screw, plug | 1 | |
36 | 0336179 | Spring, thermostat | 1 | |
37 | 0343115 | Spring, pressure relief | 1 | |
38 | 0336185 | Washer, cover | 1 | |
39 | 0343141 | Cover, thermostat | 1 | |
40 | 0322323 | Screw, cylinder head | 10 | |
41 | 0302288 | Screw, cover | 12 | |
42 | 0584589 | Temperature switch. rope models | 1 | |
43 | 0512947 | Terminal | 1 | |
44 | 0513185 | Sleeve | 1 | |
45 | 0329562 | Cover, temperature switch. rope models | 1 | |
46 | 0439083 | Powerhead gasket set | 1 | |