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10
BEFORE STARTING ENGINE
ADD OIL
Your lawnmower is shipped without oil in
the engine. For type and grade of oil to
use, see “EN GINE” in the Maintenance
section of this manual.
CAUTION: DO NOT overfi ll engine with
oil, or it will smoke heavily from the muffl er
on startup.
1. Be sure lawnmower is level.
2. Remove oil dipstick from oil fi ll spout.
3. You receive a container of oil with the
unit. Slowly pour the entire container
down the oil fi ll spout into the engine.
NOTE: Initial oil fi ll requires only 18 oz.
due to residual oil in engine from the
manufacturers 100% quality testing. When
changing oil you may need 20 oz.
4. Insert and tighten dipstick.
IMPORTANT:
• Check oil level before each use. Add oil
if needed. Fill to full line on dipstick.
• Change the oil after every 25 hours of
operation or each season. You may
need to change the oil more often
under dusty, dirty conditions. See “TO
CHANGE ENGINE OIL” in the Mainte-
nance section of this manual.
ADD GASOLINE
• Fill fuel tank to bottom of tank fi ller neck.
Do not overfi ll. Use fresh, clean, regular
unleaded gasoline with a minimum of
87 octane. Do not mix oil with gasoline.
Purchase fuel in quan ti ties that can be
used within 30 days to assure fuel fresh-
ness.
CAUTION: Wipe off any spilled oil or
fuel. Do not store, spill or use gasoline
near an open fl ame.
CAUTION: Alcohol blended fuels
(called gasohol or using ethanol or metha-
nol) can attract moisture which leads to
separation and for ma tion of acids during
storage. Acidic gas can damage the fuel
system of an engine while in storage. To
avoid engine problems, the fuel system
should be emptied before stor age of 30
days or longer. Empty the gas tank, start
the engine and let it run until the fuel lines
and carburetor are empty. Use fresh fuel
next season. See Storage In struc tions for
additional information. Never use engine
or carburetor cleaner products in the fuel
tank or permanent damage may occur.
TO STOP ENGINE
• To stop engine, release operator pres-
ence con trol bar.
TO START ENGINE
NOTE: Due to protective coatings on the
engine, a small amount of smoke may be
present during the initial use of the product
and should be considered normal.
1. To start a cold engine, push primer
three (3) times before trying to start.
Use a fi rm push. This step is not
usually necessary when starting an
engine which has already run for a few
minutes.
2. Hold operator presence control bar
down to the han dle and pull starter
handle quickly. Do not allow starter
rope to snap back.
NOTE: In cooler weather it may be
necessary to repeat priming steps. In
warmer weather over priming may cause
fl ooding and engine will not start. If you do
fl ood engine, wait a few minutes before
attempting to start and do not repeat
priming steps.
Engine
oil cap
Gasoline
fi ller cap
Primer
39
CRAFTSMAN ROTARY LAWN MOWER - - MODEL NUMBER 917.370721
NOTE: All component dimensions given in U.S. inches. 1 inch = 25.4 mm.
IMPORTANT: Use only Original Equipment Manufacturer (O.E.M.) replacement parts. Failure to do so could be hazardous, damage your lawn mower and void your warranty.
KEY PART
NO. NO. DESCRIPTION
25 161333 Baffl e, Side
26 163409 Screw #12 x 5/8
27 192876 Skirt, Rear
28 88652 Screw, Hinge 1/4-20 x 1.25
29 191221 Cable, Operator Presence
30 189179 Blade Adapter / Pulley
31 189028 Blade, 21"
32 851074 Washer
33 850263 Washer, Lock
34 851084 Bolt, Hex Head
35 188786 Debris Shield
36 192325 Bolt
37 150406 Bolt, Engine
38 - - - Engine, Briggs & Stratton,
Model Number 125K02-
0658-E1 (See Breakdown)
39 403270 Grassbag
40 194644 Frame, Grassbag
41 404763 Danger Decal
42 54583 Screw
45 183058X428 Mulcher Door Assembly
46 169699X428 Discharge Guard
47 88349 Nut, Hex
1 194577X479 Handle, Upper
2 193664X479 Handle, Lower
3 186053 Spring, Rear Door, RH
4 194788 Rope Guide
5 132004 Nut, Hex, with
Lockwasher Insert 1/4-20
6 66426 Wire, Tie
7 191574 Bolt, Handle 5/16-18 x 2-5/8
8 189713X428 Knob, Handle
9 194580X428 Control Bar
12 51793 Cotter, Hairpin
13 186052 Spring, Rear Door, LH
14 750634 Screw
15 850733X004 Bracket, Upstop
16 185855X428 Rear Door Assembly
17 184193 Bolt, Rear Door
18 198170 Plug, Mulcher
19 403269 Kit, Housing
20 192980X479 Handle Bracket Asembly, LH
21 192979X479 Handle Bracket Assembly, RH
22 150078 Screw, Hex Washer Head
23 163183 Bolt, Hex Head 5/16-18 x 5/8
24 73800500 Nut, Hex, with
Lockwasher Insert 5/16-18
KEY PART
NO. NO. DESCRIPTION
48 188839X004 Mounting Bracket,
Debris Shield
50 57808 Screw
51 193791 Pulley, Idler
52 145212 Flanged Nut
53 155552 Locknut
54 193792X004 Idler Arm
55 166043 Idler Pulley
56 160829 Shoulder Bolt
57 193315 Bracket Assembly
60 182226 Spring, Return
96 197991 Clip, Cable
- - 404764 Warning Decal
(not shown)
- - 405502 Owner’s Manual,
English / Spanish
Available accessories
(not included with lawn mower):
- - 71 33623 Gas Can
(2.5 Gallon Container)
- - 71 33500 Fuel Stabilizer
- - 71 33000 SAE 30W Oil
(20 Ounce Bottle)
KEY PART
NO. NO. DESCRIPTION