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Boot-Spark Plug

Part Number: 66538S

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Questions & Answers

Repair Instructions

*This part replaces obsolete part #: 66538.

Product Information

Description:

This replacement spark plug boot is a genuine OEM item that is utilized on Briggs and Stratton engines commonly installed on Toro lawn and garden equipment. The purpose of this rubber item is to insulate the spark plug and the wire terminal. Please note this durable rubber spark plug boot is sold individually.

Warning: California's Proposition 65

Compatibility

This part is compatible with the following machines:

Briggs and Stratton

91400 Series (0120, 0130) Engine
92200 Series (0007-1250) Engine
19K400 Series (0110-0115) Engine
93400 Series (0010-1286) Engine
129H00 Series (0005-0185) Engine
12A600 Series (0100-0112) Engine
12B600 Series (0100-0104) Engine
12C600 Series (0100-0118) Engine
12D600 Series (0015-0119) Engine
19E400 Series (0069-1168) Engine
19F400 Series (0043-1137) Engine
19G400 Series (0068-1196) Engine
60100 Series (1015, 1016, 1111, 1130-1222, 1300-1310, 4001-4010, 4015, 4016) Engine
80200 Series (2201-2413, 2416, 2419, 2421, 2422, 2423, 2424, 2426, 2428, 2429 Engine
12A800 Series (0100, 0413, 0414, 0508, 0511, 0512, 0513, 0514, 0600, 0611, 061 Engine
12B800 Series Engine
12C700 Series Engine
12C800 Series Engine
12D800 Series Engine
19A400 Series Engine
19B400 Series Engine
19C400 Series Engine
231401 Series Engine
90700 Series Engine
91700 Series Engine
82900 Series Engine
143300 Series Engine
325430 Series Engine
320400 Series Engine
141300 Series Engine
142300 Series Engine
140300 Series Engine
9B900 Series Engine
9C900 Series Engine
9D900 Series Engine
9E900 Series Engine

Toro

38580 (5900001-5999999)(1995) Snowthrower
38580 (4900001-4999999)(1994) Snowthrower
38580 (3900001-3999999)(1993) Snowthrower
38580 (2000001-2999999)(1992) Snowthrower
38580 (1000001-1999999)(1991) Snowthrower
38580 (0000001-0999999)(1990) Snowthrower
38580 (9000001-9999999)(1989) Snowthrower
38580 (8000001-8999999)(1988) Snowthrower
38155 (0000001-0999999)(1980) Snowthrower
38160 (7000001-7999999)(1987) Snowthrower
38160 (6000001-6999999)(1986) Snowthrower
38160 (5000001-5999999)(1985) Snowthrower
38160 (4000001-4999999)(1984) Snowthrower
38160 (3000001-3999999)(1983) Snowthrower
38160 (2000001-2999999)(1982) Snowthrower
38160 (1000001-1999999)(1981) Snowthrower
38160 (0000001-0999999)(1980) Snowthrower
38160 (9000001-9999999)(1979) Snowthrower
38095 (0000001-0999999)(1980) Snowthrower
38070 (8000001-8999999)(1978) Snowthrower
38060 (8000001-8999999)(1978) Snowthrower
31727 (1000001-1999999)(1971) Snowthrower
31756 (4000001-4999999)(1974) Snowthrower
31756 (3000001-3999999)(1973) Snowthrower
31760 (200001-299999)(1972) Snowthrower
31763 (7000001-7999999)(1977) Snowthrower
31763 (6000001-6999999)(1976) Snowthrower
31763 (5000001-5999999)(1975) Snowthrower
31763 (4000001-4999999)(1974) Snowthrower
31763 (3000001-3999999)(1973) Snowthrower
31813 (4000001-4999999)(1974) Snowthrower
31820 (200001-299999)(1972) Snowthrower
31823 (7000001-7999999)(1977) Snowthrower
31823 (6000001-6999999)(1976) Snowthrower
31823 (5000001-5999999)(1975) Snowthrower
31823 (4000001-4999999)(1974) Snowthrower
31832 (1000001-1999999)(1971) Snowthrower
31995 (7000001-7999999)(1977) Snowthrower
31995 (6000001-6999999)(1976) Snowthrower

31260 (200001-299999)(1972) Snowthrower
31263 (4000001-4999999)(1974) Snowthrower
31320 (200001-299999)(1972) Snowthrower
31323 (4000001-4999999)(1974) Snowthrower
31995 (5000001-5999999)(1975) Snowthrower
38090 (7000001-7999999)(1987) Snowthrower
38090 (6000001-6999999)(1986) Snowthrower
38090 (5000001-5999999)(1985) Snowthrower
38090 (4000001-4999999)(1984) Snowthrower
38090 (3000001-3999999)(1983) Snowthrower
38090 (2000001-2999999)(1982) Snowthrower
38090 (1000001-1999999)(1981) Snowthrower
38090 (0000001-0999999)(1980) Snowthrower
38090 (9000001-9999999)(1979) Snowthrower
38095 (7000001-7999999)(1987) Snowthrower
38095 (6000001-6999999)(1986) Snowthrower
38095 (5000001-5999999)(1985) Snowthrower
38095 (4000001-4999999)(1984) Snowthrower
38095 (3000001-3999999)(1983) Snowthrower
38095 (2000001-2999999)(1982) Snowthrower
38095 (1000001-1999999)(1981) Snowthrower
38150 (7000001-7999999)(1987) Snowthrower
38150 (6000001-6999999)(1986) Snowthrower
38150 (5000001-5999999)(1985) Snowthrower
38150 (4000001-4999999)(1984) Snowthrower
38150 (3000001-3999999)(1983) Snowthrower
38150 (2000001-2999999)(1982) Snowthrower
38150 (1000001-1999999)(1981) Snowthrower
38150 (0000001-0999999)(1980) Snowthrower
38150 (9000001-9999999)(1979) Snowthrower
38155 (7000001-7999999)(1987) Snowthrower
38155 (6000001-6999999)(1986) Snowthrower
38155 (5000001-5999999)(1985) Snowthrower
38155 (4000001-4999999)(1984) Snowthrower
38155 (3000001-3999999)(1983) Snowthrower
38155 (2000001-2999999)(1982) Snowthrower
38155 (1000001-1999999)(1981) Snowthrower
38565 (9000001-9999999)(1989) Snowthrower
38565 (8000001-8999999)(1988) Snowthrower

Expand the 150+ compatible machines

Questions & Answers

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Repair Instructions: Submitted by Customers Like You

Tool Type:

Lawn Mower

Parts Used:

Boot-Spark Plug - 66538S

Armature-Magneto - 591420

Repair Difficulty:

Easy

Time Spent Repairing:

Less than 15 minutes

Tools Used:

Socket set

Lawnmower would not run - coughed a couple times then stopped

1. Diagnosed "not running" as a "no spark" problem
2. Ordered new armature magneto (AM) and spark plug boot from eReplacementParts.com
3. Read included directions
4. Put mower on workbench, disconnected spark plug cable, removed top cover and cleaned.
5. Removed spark plug. Removed 2 hex bolts and wire, lifted old AMout.
6. Rotated mower flywheel to opposite side per directions, attached wire to new AM, bolted into place per instructions, leaving big space between new AM and flywheel.
7. Again per instructions, rotated mower flywheel so that magnets face AM. Placed 0.010-inch thick card (included with AM) between AM and flywheel.
8. Loosened and re-tightened bolts. Now there is a 0.010-in gap between the AM and flywheel.
9. Reassembled. Put mower on floor and connected spark plug.
10. Gave a mighty pull and mowed my lawn.

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Product Information