Craftsman 917273391 lawn tractor Parts

For Craftsman lawn tractor model 917273391, the owner’s manual lists a Briggs single-cylinder engine: Briggs & Stratton model 31H777, type 0297-E1. This is the engine family used for the engine parts breakdown and service information for this tractor.

How to confirm the engine on your exact tractor

We recommend matching the manual listing to the ID labels on your machine so you order the right tune-up and engine parts.

• Check the engine ID tag on the blower housing or valve cover area
• Match Model, Type, and Code on the engine tag (not just horsepower)
• Compare what you find to the engine listing in the owner's manual
• Use the engine model and type when looking up carburetor, starter, and gasket parts
• If the tractor has had an engine swap, rely on the engine tag, not the tractor model number

What the manual shows for model 917273391

The manual’s engine breakdown for tractor model 917.273391 identifies the engine as Briggs model 31H777-0297-E1.

Item	What to use	Where it’s used
Tractor model	917273391	Deck, steering, chassis, electrical layout
Engine model	31H777	Engine parts breakdown
Engine type	0297-E1	Correct carburetor and internal engine parts

Why it matters

Briggs engines often share similar horsepower ratings across multiple models, but parts like the carburetor, starter solenoid wiring, muffler, and gasket sets are selected by engine model and type. Using the exact 31H777-0297-E1 identification prevents wrong-part returns and no-start issues after repairs.

Last updated: February 2026

Craftsman model 917273391 was made across multiple production runs; the exact year for your specific tractor is determined by the serial number on the tractor, not the model number alone. Use the date-code guidance in the owner's manual and the serial tag on your machine to pinpoint the build date.

How to find the build year on your tractor

On Craftsman riding mowers and lawn tractors, the model number identifies the design family, while the serial number identifies when your unit was built.

• Locate the model/serial tag (commonly under the seat area, on the frame, or near the rear fender pan).
• Write down the full serial number exactly as shown.
• Use the date-code format described in the owner's manual to translate the serial number into a manufacture date.
• If the tag is dirty or faded, clean it gently and take a clear photo before the characters wear further.
• Keep the serial number with your maintenance records; it helps match the correct parts list and diagrams.

What you can confirm from the manual

The documentation confirms the product identity and configuration for this model.

Item	What we can confirm for 917273391
Brand	Craftsman
Equipment type	Front-engine lawn tractor
Deck size	42-inch mower deck
Starting system	Electric start

Why it matters

The build year affects parts compatibility for items that change over time (wiring harnesses, switches, decals, and some deck and steering components). Using the serial number date code helps ensure you order the right replacement parts the first time.

Last updated: February 2026

For Craftsman lawn tractor model 917273391, use high-quality detergent 4-cycle engine oil and choose the SAE viscosity based on outdoor temperature (5W-30 and 10W-30 are common multi-viscosity choices). For the exact viscosity chart and capacity, follow the owner's manual.

Oil type and quality to use

Use engine oil that matches these requirements:

• 4-cycle (4-stroke) engine oil (not 2-cycle mix)
• Detergent oil intended for small engines
• API service category: use a current category such as SL, SM, SN, or SP
• Pick the SAE viscosity grade for your expected operating temperature

Viscosity guidance (typical)

Most riding mower engines run well on these viscosities:

• 5W-30: best for easier cold-weather starting
• 10W-30: common for moderate temperatures
• Straight SAE 30: common for consistently warm weather

Temperature range	Typical choice	What you’ll notice
Cold weather	5W-30	Easier starting, faster lubrication
Mild to warm	10W-30	Good all-around protection
Hot weather	SAE 30	Stable viscosity in heat

Oil level checks and change interval

Keeping the crankcase full matters as much as oil selection.

• Check oil before starting the engine
• Recheck after each 8 hours of operation
• Change oil every 50 hours of operation or once a year
• Check oil with the tractor on level ground
• Fill to the FULL mark; do not overfill

Why it matters

Correct oil viscosity protects the engine during starts and under load; using a modern API-rated detergent oil helps control wear and deposits. Regular level checks prevent low-oil operation, which quickly damages small engines.

Last updated: February 2026

For Craftsman lawn tractors like model 917273391, the engine is commonly supplied by major small-engine manufacturers; for this specific tractor, the owner’s manual identifies a Briggs engine (Briggs & Stratton) in the engine breakdown. Use the engine ID tag on your tractor to confirm the exact engine model and type.

What we know for model 917273391

The engine section of the manual for Craftsman 917273391 lists the engine as a Briggs unit and points to an engine breakdown for service parts and specifications.

• Look for “Briggs” branding on the engine shroud
• Find the engine ID label (model, type, and code numbers)
• Match those numbers to the engine breakdown referenced in the owner's manual
• If the engine was replaced, use the current engine label as the correct identifier

Common engine suppliers you may see on Craftsman tractors

Craftsman has used different engine suppliers across model years and tractor series.

Engine brand	Where you’ll see it	What to use for parts
Briggs & Stratton	Many Craftsman lawn tractors	Engine model/type/code from engine label
Kohler	Some Craftsman tractors	Engine spec and serial from engine label
Kawasaki	Some higher-output models	Engine model and serial from engine label

Why the engine label matters (and the tractor model still matters)

Using the right identifier prevents ordering the wrong parts.

• Engine parts (carburetor, starter, ignition, filters): use the engine model/type
• Tractor parts (deck, steering, chassis): use tractor model 917273391
• Cutting system parts: match the deck size and blade style

If you are refreshing cut quality on the 42-inch deck, common wear items include the lawn tractor 42-in deck high-lift blade 532138971 and the husqvarna lawn tractor mandrel assembly 532130794.

Why it matters

Craftsman is the tractor brand, but the engine maker determines the correct tune-up and engine repair parts. Confirming the engine ID first saves time and avoids fit issues.

Last updated: February 2026