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Craftsman 917.279910

Front Engine Lawn Tractor — service parts and specifications. Also written 917279910.

Read this before you order anything. These figures are transcribed automatically from manufacturer manuals and can be wrong. Nothing here is a fitment guarantee or professional advice.

Provided free, as is, with no warranty and no liability accepted — you use it at your own risk and on your own responsibility. Check every number against the plate on your own machine before you buy or fit a part.

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Reference data — no warranty, no fitment guarantee, used at your own risk. Disclaimer

Spark plug
RC12YC p.4
Spark plug gap
.030 p.4
Engine oil
SAE 30 (above) · 10W30 (cold) · SAE 5W-30 (above) p.4, 14
Belt
17060516 (drive) p.33
Blade
71161010 (mulching) · 19061216 (mulching) p.41
Tire pressure
14 · 10 p.4

Transcribed from the manufacturer manual — not a fitment guarantee. Manufacturers supersede part numbers during a production run: check these against the plate on your own machine before ordering.

Note: some values below appear more than once in the manual without a clear label. This usually means the model changed across production years. Check your serial number plate before ordering.

What these parts do

Spark plug — Replace annually or every 100 operating hours. Cross-reference equivalents from other brands usually fit.

Spark plug gap — Set with a feeler gauge before installing. A wrong gap causes hard starting and rough running.

Engine oil — Grade depends on operating temperature, not on the machine. Several grades listed below are all correct — pick by season.

Belt — Belts are consumables. Length and width must match exactly — a belt that is half an inch off will throw or burn.

Blade — Sharpen or replace at the start of each season. Always balance a sharpened blade before refitting.

All values found, with sources

ItemValueContextPage
Spark plugRC12YCGULAR OILTYPE (API-SF/SG/SH): SAE 30 (above32°F) SAE 5W-30 (below32°F) 3.75 PINTS CHAMPION RC12YC OIL CAPACITY: SPARK PLUG: GAP: .030") VALVE …4
Spark plug gap.030SG/SH): SAE 30 (above32°F) SAE 5W-30 (below32°F) 3.75 PINTS CHAMPION RC12YC OIL CAPACITY: SPARK PLUG: GAP: .030") VALVE CLEARANCE: INTAKE: .004 …4
Engine oilSAE 30FICATIONS GASOLINECAPACITY 2.00 GALLONS AND TYPE: UNLEADED REGULAR OILTYPE (API-SF/SG/SH): SAE 30 (above32°F) SAE 5W-30 (below32°F) 3.75 PINTS …4
Engine oil10W30ZERK (_FRONT '_) FRONT WHEEL BEARING ZERK SEARING ZERK 14 I I t T - _ PIVOTS (_) SAE 30 OR 10W30 MOTOR OIL _GENERAL PURPOSE GREASE _) REFER TO …14
Engine oilSAE 5W-30APACITY 2.00 GALLONS AND TYPE: UNLEADED REGULAR OILTYPE (API-SF/SG/SH): SAE 30 (above32°F) SAE 5W-30 (below32°F) 3.75 PINTS CHAMPION RC12YC OIL …4
Belt17060516… Clutch 198 169593 Spring Return Clutch 6 75 202 72110612 Bolt Fin Hx 3/8-16 X 1/4 204 17060516 V-Belt Ground Drive 95 25 Keeper Belt Span Ctr Screw …33
Blade71161010Bolt 3/8-24 x 25 Grade 8 patched 95 1322.73 Washer, Lock 101 136420 Washer, Hardened 102 71161010 Blade, Mulching42" 103 19061216 Blade Mower 42" …41
Blade19061216… 95 1322.73 Washer, Lock 101 136420 Washer, Hardened 102 71161010 Blade, Mulching42" 103 19061216 Blade Mower 42" Hi-Lift 104 10071000 Bearing, Ball …41
Tire pressure14… 4th 3.5 5th 4.8 6th 5.4 REVERSE: 1.5 TIRE PRESSURE: CHARGING SYSTEM: BA'I-I'ERY: FRONT: 14 PSI REAR: 10 PSI 16 @ 3600 RPMS AMP/HR: 30 MIN. CCA: 240 …4
Tire pressure10… 6th 5.4 REVERSE: 1.5 TIRE PRESSURE: CHARGING SYSTEM: BA'I-I'ERY: FRONT: 14 PSI REAR: 10 PSI 16 @ 3600 RPMS AMP/HR: 30 MIN. CCA: 240 CASE SIZE: U 1R …4

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