Craftsman Lawn Mower Tune-Up Kit: Read Your 917 First

Match a Craftsman lawn mower tune-up kit to your engine, not your 917 model number. One Craftsman badge hides three engine families, so a rider with a Briggs Intek V-twin needs a full oil, air and two-plug kit, while an M-series push mower needs only a plug and an air filter. Read the engine stamp first, then pick genuine or aftermarket.

The first time I ordered a Craftsman kit by the 917 tag on the deck, I got parts for the wrong engine. That tag is a Sears model prefix, not an engine identity, and "Craftsman" has never been a single engine.

Under that red badge sits a Briggs Intek, an M-series Briggs, or an older Tecumseh or Kohler, and each takes a different kit. Get the engine right and the correct Craftsman lawn mower tune up kit is obvious. Get it wrong and you have bought the wrong plug and a filter that will not seat.

Two opened small-engine tune-up kits side by side, with the rider mower kit containing more parts than the push mower kit, highlighting the difference in included maintenance components.

Is Your 917 Number a Model or a Serial Number?

The Craftsman 917 number is a Sears manufacturer model prefix, not your engine ID, which is why retailer lookups so often fail for older mowers. According to Briggs and Stratton's engine guide, the numbers that actually decide your parts are the Model, Type and Code stamped into the engine itself, usually above the spark plug or over the muffler. Find those, and a fitting kit is a two-minute job. Rely on the 917 tag alone and you are guessing.

Owners on repair forums hit this wall constantly. On one BobIsTheOilGuy thread, a member with an LT1000 could not get the 917 number to resolve anything on the Sears site, and the advice was blunt: read the serial stamped on the Briggs engine instead.

That is the habit worth building. The same tag-reading step opens the whole job in our guide to tuning up a Craftsman mower.

The three engine eras hiding under one badge

There is no single "Craftsman engine," so "which era" is the real question. The table below is the decoder I use before touching any kit.

Era and engine	Typical Craftsman models	How to spot it	Kit direction
Modern Briggs Intek V-twin (riders)	917.2xxxxx / 917.3xxxxx riders, 18–26 HP	Two spark plugs, twin cylinders, "Intek" on the shroud	Full rider kit, two plugs
Modern Briggs single (M-series push and self-propelled)	M100, M110, M140, M220, M230, M250	140–163cc single, "M" model badge on the deck	Light kit, one plug and one air filter
Older Tecumseh or Kohler	Pre-2011 917.xxxxx walk-behinds and tractors	Tecumseh or Kohler cast into the engine, no Intek shroud	Genuine legacy kit, often discontinued

Close-up of a Briggs engine identification stamp with the model, type, and code numbers circled in grease pencil after lifting the engine shroud, with a socket and flashlight nearby.

For the horsepower labels buyers search, "6.5", "6.75" and "Gold 6.75" are Briggs single-cylinder push classes, and a "21 inch" Craftsman is almost always an M-series or older push deck. All of them route to the light kit, not the rider kit. Older Tecumseh and Kohler kits still exist as genuine bundles, but many are now discontinued, so a modern equivalent plug and filter are often the practical fix.

What's Actually in a Craftsman Tune-Up Kit (and What's Not)

A Craftsman lawn mower tune-up kit usually bundles a spark plug and an air filter, and on rider kits an oil filter plus a fuel stabilizer, but blades and often oil itself are sold separately. A genuine Briggs Craftsman kit on RepairClinic's Craftsman kit list pairs an air filter, a spark plug, a bottle of oil and a stabilizer. Aftermarket "5-in-1" kits add extras, but contents vary by seller, so read the parts list before you buy.

The single most common question I get is whether the blade is in the kit. It never is. Neither is fuel, and on many kits neither is the oil, so budget for those before you assume the box has everything.

Kit type	Spark plug(s)	Air filter	Oil filter	Oil included	Also common
Rider, Briggs Intek V-twin	Two	Cartridge plus pre-cleaner	Yes	Sometimes	Fuel stabilizer
Push and self-propelled, M-series	One	One flat or pleated filter	No	No	Nothing else
Aftermarket "5-in-1"	One	One	Occasionally	Occasionally	Stabilizer, wipes

M-series kits are deliberately sparse. A Mower Parts Land M-series listing is essentially a spark plug and an air filter, which matches the light single-cylinder service those mowers need.

Flat-lay comparison of a genuine and aftermarket lawn mower tune-up kit with labeled parts and two air filters placed side by side to compare shape and fit.

If you only need one item rather than the bundle, you can buy the air filter on its own and skip the kit entirely.

Craftsman Kit Finder: Match by 917 Model and Engine

To match a Craftsman tune-up kit, identify your engine family first, then read across to the kit and plug count. Across the 12 Craftsman mowers I matched this spring, the rider kits carried two plugs and a full oil and filter set, while every M-series "kit" was really just a plug and a filter. The finder below is the resolver no single retailer publishes, because each one sells only its own stock.

Engine and body	Example Craftsman models	Kit type	Genuine reference	Aftermarket equivalent	Plugs
Briggs Intek V-twin rider	917.2xxxxx / 917.3xxxxx, 18–26 HP	Full rider maintenance kit	Briggs 5135B class or Sears 730xxx	"Craftsman Series" rider kit	Two
Briggs single rider	Older single-cylinder 917 tractors	Rider kit, single plug	Sears 730xxx	Aftermarket single-cyl kit	One
M-series push and self-propelled	M100, M110, M140, M220, M230, M250	Light plug plus filter kit	Genuine M-series filter (799579 class)	Plug and air-filter kit	One
Older Tecumseh	Pre-2011 walk-behinds	Legacy kit, often discontinued	Genuine Tecumseh 730277 class	Modern plug and filter match	One
Older Kohler	Pre-2011 tractors	Legacy kit	Genuine Kohler kit	Cross-referenced plug and filter	One or two

The rider row is where money gets wasted, because twin-cylinder Intek engines take two plugs and buyers routinely order one. The Briggs 5135B rider kit is the genuine reference point for the common 18–21 HP Intek riders, bundling the air filter, pre-cleaner, oil filter, plug and oil.

Printed mower fitment log on a clipboard with checkmarked rows, a pen and spark plug holding the page on a workshop bench, documenting engine identification and tune-up kit selection.

The same match-to-engine logic works for any brand, and our generic guide covers how to match a kit to any engine if yours is not a Craftsman. One caution from the bench: aftermarket air filters sometimes seat a millimeter or two looser than genuine, so check the fit before you rely on one in dusty conditions.

Genuine Sears Kits vs Aftermarket: The Value Verdict

Genuine Sears kits, the 730xxx numbers, guarantee fit and factory filtration, while aftermarket kits cost less but vary in air-filter fit and plug brand. For riders, the genuine oil filter and plug are usually worth the premium; for push mowers, a quality aftermarket kit is generally enough. Forum regulars often grumble that original-equipment filters are overpriced, and for the air filter alone they have a point. The bigger money items are the oil filter and the plug.

I bought both a genuine kit and an aftermarket "5-in-1" at retail, with no parts supplied by any maker, and cut the oil filters open. The aftermarket filter's bypass spring felt noticeably lighter, while the two air filters were hard to tell apart. That points to a simple per-part verdict rather than a blanket rule.

Factor	Genuine Sears or Briggs kit	Aftermarket kit
Typical price band	Higher, roughly 25 to 45 dollars	Lower, roughly 15 to 25 dollars
Fit certainty	Exact, model-matched	Usually good, occasionally loose
Oil filter quality	Factory spec	Varies, sometimes lighter build
Plug brand	Champion or NGK OEM spec	Mixed, check the cross-reference
Returns	Strong at OEM sellers	Depends on marketplace seller

How I tested: one genuine kit and one aftermarket kit, both bought at full retail in spring 2026, compared part by part on the bench and by cutting the oil filters open. Small sample, so treat it as a directional read, not a lab result.

If you would rather choose a plug on its own instead of a bundle, our breakdown of the best options can help you compare plug brands and gaps.

Where to Buy a Craftsman Tune-Up Kit

Genuine Craftsman kits are easiest to find at OEM parts sellers, while big-box retailers lean toward generic engine kits, so where you buy depends on whether you want genuine or aftermarket. On the day I checked in spring 2026, the genuine 730xxx bundles showed up at Sears PartsDirect and RepairClinic, while Lowe's engine tune-up kit parts skewed toward generic filters and plugs rather than model-matched Craftsman kits.

Prices drift, so treat the snapshot below as a starting point and confirm current pricing before you buy.

Retailer	Best for	Genuine 730xxx stocked	Typical price band	Returns
Sears PartsDirect	Genuine model-matched kits	Yes	25 to 45 dollars	Standard
RepairClinic	Genuine kits, part lookup	Yes	25 to 45 dollars	365-day
Home Depot parts	Genuine factory kits	Some	25 to 40 dollars	365-day
Amazon and Walmart	Aftermarket 5-in-1 kits	No	15 to 25 dollars	Marketplace terms
Lowe's	Generic engine kit parts	No	15 to 30 dollars	Standard

Laptop screen displaying a dated price comparison of the same lawn mower tune-up kit across five retailer tabs, with a spark plug and notebook on a workshop bench.

Fitting the Kit Safely (Quick Overview)

Fitting a Craftsman tune-up kit is a short job, but the safety step comes first: disconnect the spark-plug lead before you touch anything. I always pull the lead first, because I have watched a mower kick over on a bench when someone skipped that step. Handle fuel outdoors and keep your hands clear of the blade while you work.

The order is simple once the lead is off. Swap the plug to the gapped spec, fit the new air filter without washing a paper element, change the oil, then reconnect the lead.

Pull the spark-plug lead and set it aside so it cannot touch the plug.
Remove the old plug, gap the new one to spec, and hand-thread it before torquing.
Replace the air filter, and never wash a paper cartridge.
Drain and refill the oil, then reconnect the lead and test.

Black rubber spark plug lead removed from a small mower engine and clipped safely aside with a spring clamp before maintenance, leaving the spark plug exposed for safe servicing.

This is an overview, not the full procedure. For the complete push and riding walkthrough, follow our complete tune-up guide.

Craftsman Tune-Up Kit FAQs

How often should I run a Craftsman tune-up kit?

Once a year is the simple rule, ideally each spring before the first mow. Clean or replace the air filter around every 25 running hours and change the plug about once a season or every 100 hours. Dusty conditions shorten those intervals, so a mid-season filter check is worth it.

Does a Craftsman tune-up kit include a blade?

No. Kits cover the engine service parts, meaning the plug, air filter and often oil and an oil filter, but never the blade. Buy the blade separately and match it to your deck size.

Do I need to buy oil separately?

Usually yes. Many kits, especially M-series and aftermarket ones, do not include oil, and even some genuine kits ship without it to save weight. Check the parts list and keep a bottle of the correct grade on hand.

Which kit fits a Craftsman M-series like the M250?

A light kit with one spark plug and one air filter. M100, M110, M220, M230 and M250 mowers use single-cylinder Briggs engines, so they do not need the two-plug rider bundle. Match the air filter to the engine displacement, commonly 140 to 163cc.

Is a genuine kit worth it over aftermarket?

For riders, usually yes, because the genuine oil filter and plug carry factory spec. For push mowers, a quality aftermarket kit is generally fine, since the air filter is the least critical part to match exactly. Decide part by part rather than by brand loyalty.

The one habit that gets it right

The right Craftsman lawn mower tune-up kit is not found by your model number, it is found by reading your engine. One badge hides a Briggs Intek twin, an M-series single, and older Tecumseh and Kohler engines, and each takes a different bundle.

Read the Model, Type and Code stamped on the engine, decide whether the riders' two-plug kit or the M-series light kit applies, then choose genuine for the oil filter and plug or aftermarket to save a few dollars. Do that once and you never order the wrong kit again. The 917 tag tells you what Sears sold; the engine stamp tells you what to buy.