Briggs & Stratton 331777-2372-G5 engine Parts

For your Briggs 331777-2372-G5 lawn and garden engine, the most reliable way to pull the correct specs is to use the engine’s identification numbers (Model, Type, and Code) from the engine itself; those numbers match you to the exact configuration so you get the right tune-up parts and service details.

Where to find the Model, Type, and Code numbers

On Briggs engines, these IDs are typically stamped or printed directly on the engine (not on the mower or tractor frame). Check these common spots:

• Valve cover area
• Blower housing (recoil starter shroud)
• Muffler heat shield
• Near the spark plug
• On a metal tag or label attached to the engine

Write the numbers down exactly as shown, including dashes.

How to use those numbers to get the right specs

Once you have the Model, Type, and Code:

• Use the Model number to identify the engine family (yours is 331777-2372-G5).
• Use the Type number to match the exact carburetor, governor, and fuel system setup.
• Use the Code number to match the production date and any running changes.

Specs you can confirm after you match the IDs

After you match the engine IDs, you can confidently look up items such as:

• Air filter and pre-filter style
• Fuel filter type and hose size
• Ignition system parts
• Gasket and seal locations
• Carburetor configuration

Common maintenance parts for model 331777-2372-G5

If you are doing a basic tune-up, these are commonly referenced parts available for this engine:

Maintenance item	Example part on this model page	What it affects
Fuel filtration	Briggs & stratton lawn & garden equipment engine fuel filter (white) 394358S	Hard starting, surging, fuel starvation
Air filtration	Briggs & stratton lawn & garden equipment engine air filter 793569	Power loss, black smoke, rich running
Pre-filter	Briggs & stratton lawn and garden equipment engine pre-filter 793685	Extends air filter life in dusty mowing
Ignition	Briggs & statton lawn & garden equipment engine ignition coil 595304	No-spark, misfire under load

Why it matters

Briggs engines often share similar-looking parts across multiple Type and Code variations. Matching the Model, Type, and Code prevents ordering the wrong carburetor, gasket set, or ignition parts and helps your engine start easier, run smoother, and last longer.

Ordering tip

We recommend ordering replacement parts for your Briggs 331777-2372-G5 from the parts list for this model; for broader model searches and ordering options, use Sears PartsDirect.

Last updated: February 2026

A Briggs lawn and garden engine like model 331777-2372-G5 is built around fuel delivery, air intake, ignition, and internal moving parts that create power. Common engine parts include the air filter, carburetor, ignition coil, gaskets and seals, and starter components.

Core engine systems and common parts

• Fuel system: fuel tank, fuel line, fuel filter, carburetor
• Air intake: air filter, pre-filter, intake passages
• Ignition: flywheel magnets, ignition coil, spark plug lead/boot
• Starting system: starter drive, starter motor components, recoil (on some setups)
• Engine internals: crankshaft, camshaft, connecting rod, piston
• Sealing surfaces: head gasket, crankcase gasket, oil seals, O-rings

Parts you will commonly service on 331777-2372-G5

These are frequent maintenance or no-start culprits on lawn and garden engines:

• Briggs & stratton lawn & garden equipment engine air filter 793569
• Briggs & stratton lawn and garden equipment engine pre-filter 793685
• Briggs & stratton lawn & garden equipment engine fuel filter (white) 394358S
• Briggs & statton lawn & garden equipment engine ignition coil 595304
• Briggs & stratton lawn & garden equipment engine cylinder head gasket 794114

Quick “what it does” reference

Part or system	What it does	Common symptom when it fails
Air filter and pre-filter	Keeps dirt out of the engine	Hard starting, black smoke, loss of power
Fuel filter and carburetor	Delivers clean fuel at the right mix	Surging, stalling, won’t start
Ignition coil and plug lead	Creates spark at the right time	No spark, intermittent shutdown
Gaskets and seals	Keep compression and oil where they belong	Oil leaks, low compression, misfire
Starter drive	Engages the flywheel to crank the engine	Starter spins but engine does not turn

Why it matters

Knowing the major parts helps you troubleshoot faster and order the right replacement. For example, a dirty air filter can mimic carburetor problems, and a weak ignition coil can look like a fuel issue.

Ordering the right parts

We recommend matching parts to the exact model number 331777-2372-G5 and using the illustrated parts list for your engine. You can also search by model number on Sears PartsDirect if you are working on a different Briggs engine family.

Last updated: February 2026

Briggs & Stratton does not use one single model number for every 17.5 HP engine; 17.5 HP is a power rating used across multiple engine models. For this Sears PartsDirect page, the specific engine model number is 331777-2372-G5, and parts should be matched to that exact model.

How to identify the correct model number on your engine

We match parts by the engine’s Model, Type, and Code (often stamped into the blower housing, valve cover area, or printed on an engine label). Use these checks:

• Look for a stamped number set that starts with a 6-digit model (example format: 331777-2372-G5)
• Confirm the Type number (it narrows down carburetor, ignition, and governor variations)
• Record the Code (it indicates the production date and can affect part revisions)
• Match what you find to the parts list for 331777-2372-G5 before ordering
• If the label is dirty or faded, clean the area and re-check under good lighting

Common 17.5 HP engine model examples (for reference)

Different equipment brands and years used different Briggs engines at the 17.5 HP rating. Here is a quick comparison of what we see most often:

What you have	What it means for parts	What to do
“17.5 HP” only	Power rating, not a parts identifier	Find the stamped Model/Type/Code
Model like 331777-2372-G5	Exact engine family and configuration	Use the parts list for that model
Different model (example: 31R977-0029-G1)	Similar HP, different design	Order parts by your exact model

Why it matters

Two engines can both be labeled 17.5 HP but use different carburetors, air filters, ignition coils, and gaskets. Matching parts to the exact model number helps prevent hard starting, fuel leaks, poor performance, and no-spark conditions.

Parts we commonly replace on model 331777-2372-G5

If you are doing a tune-up or solving a start/run issue, these are common maintenance parts for this model:

• Briggs & stratton lawn & garden equipment engine air filter 793569
• Briggs & stratton lawn & garden equipment engine fuel filter (white) 394358S
• Briggs & stratton lawn and garden equipment engine pre-filter 793685
• Briggs & statton lawn & garden equipment engine ignition coil 595304

To order parts for your exact engine, use the parts list for 331777-2372-G5 on this page, or search by model number on Sears PartsDirect.

Last updated: February 2026