Craftsman 143014500 engine Parts

A “Craftsman 6.75” label usually refers to the engine power class, not the mower’s full model number. For a Craftsman mower commonly described as 6.75, the complete mower model is often 917.377911; for engine parts, we use the engine model 143014500 shown on the engine ID tag.

How to identify the correct model number

Use these quick checks to match the right Craftsman model for parts and diagrams:

• Look for a model tag on the mower deck (often near the rear wheel or under the handle)
• Check the engine shroud or blower housing for the engine model and spec numbers
• Write down the full model number exactly as shown (numbers and dots matter)
• Use the mower model for chassis parts (wheels, handle, deck hardware)
• Use the engine model 143014500 for carburetor, ignition, and internal engine parts

Mower model vs. engine model (what to use for parts)

What you are fixing	Use this model number	Examples of parts
Mower deck and drive components	Mower model (often 917.xxxxxxx)	Wheels, height adjusters, deck hardware
Engine fuel and ignition	Engine model 143014500	Carburetor parts, ignition coil, fuel line

Common engine parts people replace on model 143014500

If your “6.75” mower is running rough, won’t start, or leaks fuel, these are frequent fixes on the Craftsman engine model 143014500:

• Replace a hardened primer bulb: Craftsman lawn & garden equipment engine carburetor primer bulb (red) 640259
• Fix fuel seepage at the bowl or carb mounting: Craftsman lawn and garden equipment engine carburetor gasket 26756
• Address flooding or fuel overflow: needle seat 631021B
• Replace a cracked or soft fuel hose: line 29774

Why it matters

Using the correct model number prevents ordering the wrong part. “6.75” alone is not specific enough because multiple Craftsman mowers and Tecumseh-built engines share that power label but use different carburetors, gaskets, and ignition parts.

Last updated: February 2026

A Craftsman lawn mower engine like model 143014500 is built from a few core systems: fuel delivery (tank, carburetor, fuel line), air intake (filter), ignition (coil and spark plug), and internal moving parts (crankshaft, piston, camshaft) that create power and spin the blade.

Main engine systems (and what they do)

• Fuel system: stores and delivers clean fuel to the carburetor
• Air intake: filters air so dirt does not damage the engine
• Ignition system: creates spark at the right time to ignite the fuel mixture
• Starting system: lets you pull-start the engine
• Governor system: helps control engine speed under load
• Sealing and lubrication: keeps oil in and dirt out

Common parts you will see on Craftsman model 143014500

These are examples of real parts used on this engine family:

• Carburetor parts such as the carburetor 640278A and Craftsman lawn & garden equipment engine carburetor primer bulb (red) 640259
• Fuel delivery parts such as the line 29774 (fuel line) and Craftsman lawn & garden equipment engine carburetor fuel inlet fitting 631807
• Ignition parts such as the lamination 34443D (ignition coil)
• Internal engine parts such as the crankshaft 37527, lawn & garden equipment engine camshaft 37460, and piston assembly 40044
• Gaskets and seals such as the Craftsman lawn & garden equipment engine carburetor gasket 26756 and Craftsman lawn & garden equipment engine oil seal 27897

Quick “system to part” map

Engine system	What it affects	Example part you might replace
Fuel and carburetion	Hard starting, surging, stalling	Carburetor rebuild kit 632760B
Ignition	No-start, misfire	Lamination 34443D
Air intake	Rich running, poor power	(air filter and related gaskets)
Internal rotating parts	Knocking, low compression	Connecting rod 36777A

Why it matters

Knowing which system a symptom belongs to speeds up troubleshooting. For example, a no-start is often fuel delivery (carburetor, primer bulb, fuel line) or ignition (coil, spark plug), while oil leaks point to seals and gaskets.

Last updated: February 2026

For Craftsman model 143014500, the “kind of engine” is best identified by the engine’s model family and specs on the engine shroud and carburetor setup; this model number is commonly associated with a Tecumseh-built small gas, 4-cycle lawn and garden engine. If you are matching parts or troubleshooting, use the exact 143014500 ID and the carburetor/ignition parts list to confirm the configuration.

How to identify the exact engine type on 143014500

Use these quick checks on the engine itself (not the mower deck model):

• Find the engine ID tag/shroud stamping and confirm it reads 143014500.
• Note whether it is a 4-cycle gasoline engine (separate oil fill, no oil mixed in fuel).
• Check the carburetor style: primer-bulb carburetors are common on this platform (see Craftsman lawn & garden equipment engine carburetor primer bulb (red) 640259).
• Confirm ignition type by the coil/armature used (see lamination 34443D).
• If the engine surges or won’t stay running, confirm the fuel system sealing surfaces and gaskets (see Craftsman lawn and garden equipment engine carburetor gasket 26756).

Common “engine type” descriptions you will see

These are the most common ways owners describe this engine when ordering parts:

What you might call it	What it usually means	Why it helps
Tecumseh/Craftsman 143-series engine	Tecumseh-built engine sold under Craftsman numbering	Best for parts lookup by model number
4-cycle gas lawn mower engine	Separate crankcase oil, gasoline in tank	Helps with fuel and oil guidance
Primer-bulb carbureted engine	Uses a primer bulb to enrich fuel for starting	Helps diagnose hard-start issues

Why it matters

The exact engine family determines the correct carburetor parts, ignition coil, fuel line routing, and gaskets. Using the 143014500 engine model number prevents ordering the wrong carburetor or ignition parts for a similar-looking Craftsman mower.

Quick troubleshooting tie-in (if you are asking because it won’t start)

• Replace stale fuel and clean the tank
• Inspect the fuel line for cracks or soft spots (see line 29774)
• Check primer bulb condition and sealing
• Verify spark with the correct ignition components
• Rebuild or replace the carburetor if it floods or runs lean (see carburetor 640278A)

Last updated: February 2026