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TRACTOR - - MODEL NUMBER 917.273170
KOHLER ENGINE-MODEL NUMBER CV490 TYPE NUMBER 27532
CYLINDER HEAD/VALVE/BREATHER
CRANKCASE
KEY PART KEY PART
NO. NO. DESCRIPTION NO. NO.
DESCRIPTION
1 25-351_01-S Lifter, valve (2) 1 12_032_03_S
2 12_755_97_S Kit, cylinder head 2 N/A
(includes 3_16, Gaskets
12 041 01_S (Qty. 2), 3 12_445_02_S
12 041 02_S, & 12 041 03_S) 4 M839025_S
3 12-411-05_S Rod, push (2) 5 24_380_13-S
4 12-041-10-S Gasket, cylinder head 6 12_010_31_S
5 12-017_01-S Valve, intake (Std.) 7 12_422_08_S
6 12-016-01-S Valve, exhaust (Std.) 12_422_09_S
7 12_318_36-S Cylinder Head 12_422_10-S
8 25-186_01-S Arm, rocker (2) 12_422_11_S
9 12_599_03_S Pivot, rocker arm (2) 12_422_12_S
10 M_640034_S Screw, hex. flange M6xl.0x34 12_422_13-S
(2) 12-422_07-S
11 12-089-34-S Spring, valve (2) 8 12-144_28_S
12 12-173-01_S Cap, valve spring (2) 9 12-874_07-S
13 12W55_03_S Kit, retainer (2)
14 12-468_05_S Washer, plain 13/32" 12-874_11_S
15 12_112-13_S Spacer, head bolt exhaust port 12-874_08_S
16 20_086-02_S Screw, hex. flange 12-874-09_S
M!0x1.5x81 (5) 10 12 018 02-S
17 25-237-14-S Clamp, hose (2) 11 12-108-07-S
18 12_326-18-S Hose, breather 12-108-08_S
19 M_645016_S Screw, hex. flange 12-108-09_S
M6xl.0x20 (5) 12 12-067_11_S
20 12_096-47_S Cover, valve w/nipple 12-067_12_S
21 M_545010-S Screw, hex. flange M5x0.axl0 13 12-380_01-S
22 66-018_04-S Retainer, breather reed 14 12-043_05-S
23 12_402-02_S Reed, breather 15 M631005_S
16 12-144-02-S
NOT ILLUSTRATED 17 52_139_09_S
12-017-02-S Valve, intake (,25) 18 12-755_64-S
12_016-02_S Valve, exhaust (,25)
19 X25102_S
20 12-032_01-S
21 M631015-S
22 12-154_05-S
Seal, crankshaft
Crankcase (Use Short
Block 12 522 51)
Strap, lifting
Screw, hex. flange Max1.25x25
Pin, locating (4)
Camshaft assembly
Shim, camshaft-blue(A.R.)
Shim, camshaft * red(A.R.)
Shim, camshaft * yellow (A.R.)
Shim, camshaft * green (A.R.)
Shim, camshaft * gray (A.R.)
Shim, camshaft _black (A.R.)
Shim, camshaft _white (A.R.)
Shaft, balance
Piston wiRing Set (Std.)
(Includes 11,12)
Piston wiRing Set (.08)
Piston wiRing Set (.25)
Piston wiRing Set (.50)
Retainer, piston pin (2)
Ring Set (Std.)
Ring Set (.25)
Ring Set (.50)
Connecting Rod (Std.)
Connecting Rod (.25)
Pin, governor regulating
Gear, governor
Washer, plain 6 mm
Shaft, governor gear
Plug, cup
Kit, governor cross shaft
w/clip (includes 22)
Washer, plain 114"
Seal, governor cross shaft
Washer, plain 6 mm
Clip, hitch pin
NOTE: All component dimensions given in U.S.
inches 1 inch = 25.4 mm
49