Craftsman 917376690 rotary lawn mower Parts

No. Craftsman mower blades are not all the same; they must match your mower’s deck size, mounting style, and cutting system. For Craftsman model 917376690 (21-inch Multi-Cut), use the blade type and part listing specified in the 917376690 owner's manual.

Even when two blades are both “21-inch,” they can differ in ways that prevent a safe fit or good cut.

• Deck size and blade length (must match the 21-inch deck on model 917376690)
• Center hole and adapter pattern (star, round, “bow-tie,” etc.)
• Blade thickness and lift (low, medium, high lift affects bagging and airflow)
• Cutting style (standard, mulching, 3-in-1)
• Rotation and curvature (blade sail shape impacts discharge and mulching)

We recommend matching the blade to how you mow and to the exact mounting hardware used on your mower.

1. Confirm the mower model is 917376690.
2. Check the parts list and blade illustration in the manual.
3. Decide your goal: bagging, side discharge, or mulching.
4. Replace worn mounting hardware if it is damaged or rounded.

Using the wrong blade can cause vibration, poor cut quality, and premature wear on the blade adapter, crankshaft area, and drive components. The correct blade also improves airflow for bagging and consistent mulching.

Last updated: January 2026

On the Craftsman 917376690 rotary lawn mower, the most common problems we see are no-start conditions, loss of power, poor or uneven cutting, excessive vibration, and drive issues (hard to push or loss of self-propel). These symptoms usually trace back to basic maintenance, blade condition, or drive components listed in the troubleshooting chart in the 917376690 owner's manual.

• Won’t start: spark plug/wire issue, control bar not held, fuel shutoff OFF (if equipped)
• Loss of power: dirty air filter, grass buildup under deck, cutting too much at once
• Poor cut or uneven cut: worn/bent/loose blade, uneven wheel height settings, deck packed with clippings
• Excessive vibration: loose blade, damaged blade adapter, bent crankshaft
• Hard to push or loss of drive: worn or stretched ground drive belt, pulley or drive linkage wear

1. Disconnect the spark plug wire before inspecting the blade or underside.
2. Verify the control bar is held firmly against the handle during starting.
3. Check for grass and debris buildup under the mower deck.
4. Inspect the blade for bends, heavy nicks, or looseness.
5. If self-propelled performance drops, inspect the belt and pulley area.

Catching these issues early prevents bigger damage (especially vibration-related problems) and keeps the mower cutting cleanly. A sharp, secure blade and a properly tensioned drive belt make the biggest day-to-day difference in performance.

Last updated: January 2026

A “Craftsman 6.75” mower does not map to one single model number because 6.75 is an engine power rating used across multiple Craftsman walk-behind mowers. For an exact match, use the model number from the ID tag on your mower; for this page, the model is 917.376690 (often written as 917376690). See the 917376690 owner's manual for where the model tag is shown and how the mower is identified.

Check these common locations on Craftsman rotary lawn mowers:

• Rear of the deck near the discharge opening
• Top of the deck near the engine mounting area
• Under the rear door (bagging opening)
• On the handle bracket area
• On a sticker or metal plate with “Model No.” and “Serial No.”

Write the model number exactly as printed (including dots). Many Craftsman walk-behind mowers start with 917.

“6.75” typically refers to the engine’s advertised horsepower class, not the mower’s chassis model. Different models can share the same engine rating but use different parts such as wheels, belts, and blades.

The manual for Craftsman 917.376690 describes a 21-inch multi-cut, power-propelled rotary mower. If your mower matches those basics, you are likely on the right model page.

Using the exact model number prevents ordering the wrong wear items (like a blade, drive belt, or wheel adjuster) that can look similar but fit differently.

Last updated: January 2026