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Craftsman 917.279942

Front Engine Lawn Tractor — service parts and specifications. Also written 917279942.

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
.040 p.4
Engine oil
SAE 30 (above) · SAE 5W-30 (above) · 5W-30 (above) p.4
Belt
140294 (drive) p.35
Blade
71081010 (mulching) · 19061216 (mulching) p.43
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 plugRC12YC… (below 32°F) OIL CAPACITY: W/FILTER 4.0 PINTS W/OFILTER 3.75 PINTS SPARK PLUG: CHAMPION RC12YC GAP: .040") GROUND SPEED (MPH): Forward: 0-5.5 …4
Spark plug gap.040… 32°F) SAE 5W-30 (below 32°F) OIL CAPACITY: W/FILTER 4.0 PINTS W/OFILTER 3.75 PINTS SPARK PLUG: CHAMPION RC12YC GAP: .040") GROUND SPEED (MPH) …4
Engine oilSAE 30CIFICATIONS GASOLINE CAPACITY 2.0 GALLONS AND TYPE: UNLEADED REGULAR OILTYPE (API-SF-SJ): SAE 30 (above 32°F) SAE 5W-30 (below 32°F) OIL CAPACITY …4
Engine oilSAE 5W-30CAPACITY 2.0 GALLONS AND TYPE: UNLEADED REGULAR OILTYPE (API-SF-SJ): SAE 30 (above 32°F) SAE 5W-30 (below 32°F) OIL CAPACITY: W/FILTER 4.0 PINTS …4
Engine oil5W-30ACITY 2.0 GALLONS AND TYPE: UNLEADED REGULAR OILTYPE (API-SF-SJ): SAE 30 (above 32°F) SAE 5W-30 (below 32°F) OIL CAPACITY: W/FILTER 4.0 PINTS …4
Belt140294… Return, Clutch 198 169593 56 17060616 Bolt Fin Hex 3/8-16 UNC x 1-1/4 199 169612 57 140294 V-Belt, Ground Drive 200 72140508 59 169691 Keeper …35
Blade71081010… Bolt 3/8-24 x 25 Gr. 8 patched 95 175747 Washer, Lock 101 136420 Washer, Hardened 102 71081010 Blade, Mulching 42" Std 103 19061216 Blade Mower 42" …43
Blade19061216… Washer, Lock 101 136420 Washer, Hardened 102 71081010 Blade, Mulching 42" Std 103 19061216 Blade Mower 42" Hi-Lift Std 104 10071000 Shaft Assembly …43
Tire pressure14RC12YC GAP: .040") GROUND SPEED (MPH): Forward: 0-5.5 Reverse 0-2.4 TIRE PRESSURE: FRONT: 14PSI REAR: 10PSI CHARGING SYSTEM: 16 AMPS @ 3600 RPM …4
Tire pressure10… GROUND SPEED (MPH): Forward: 0-5.5 Reverse 0-2.4 TIRE PRESSURE: FRONT: 14PSI REAR: 10PSI CHARGING SYSTEM: 16 AMPS @ 3600 RPM BATTERY: AMP/HR: 30 …4

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