MTD 12AGA2MP793 gas lawn mower Parts

For your MTD walk-behind mower model 12AGA2MP793, the most reliable way to get the right part is to match the exact model number from the product ID label to the correct parts diagram, then confirm the part by name and reference location before ordering. If you are replacing a bag or battery item, match it to a known compatible listing such as the lawn mower grass bag 664P05322A.

• Find the product identification label on the mower deck, rear shield, or handle support area.
• Confirm the model number is 12AGA2MP793 (character-for-character).
• Use the parts diagrams for that exact model to locate the part by illustration and callout.
• Match the callout to the part listing (name plus part number/ID).
• Compare your old part to the listing (mounting points, connectors, shape, and finish).

Many walk-behind mowers have two “identities”: the mower model and the engine model. For 12AGA2MP793:

• Verify whether your mower is set up for bagging, mulching, or side discharge.
• Confirm any electrical parts match your mower’s configuration (if equipped).
• If you are ordering a battery item, match the exact listing such as the lawn mower battery pack 725P10305 or lawn mower battery charger 725P10265.

Using the exact 12AGA2MP793 model number prevents ordering look-alike MTD parts that do not fit due to small changes in deck design, handle style, or attachment mounting.

Last updated: January 2026

For your MTD gas lawn mower model 12AGA2MP793, we determine the build year from the mower’s serial number, not the model number. On many MTD 11-character serial numbers, the 5th character indicates the last digit of the year it was manufactured.

Look for a product label or stamped tag in common locations such as:

• The rear of the deck near the discharge opening
• The top of the deck near the engine mounting area
• The back flap area (near the bagging opening)
• The handle bracket area

If you are replacing missing or damaged bagging components while you check labels, the lawn mower grass bag 664P05322A is a model-matched part for 12AGA2MP793.

Once you have the serial number, use this quick method:

• Confirm it is an 11-character MTD serial number
• Identify the 5th character
• That character equals the last digit of the manufacture year
• Use the mower’s overall age and features to decide the correct decade (for example, 2014 vs 2004)

Knowing the manufacture year helps us match the correct MTD parts and diagrams for your 12AGA2MP793, especially when a model has multiple production runs with small changes (deck hardware, controls, or bagging setup).

For general help identifying model and serial tags, use how to find your appliance model number (and what it means for parts).

Last updated: January 2026

For the MTD 12AGA2MP793 gas walk-behind mower, we recommend using 87-octane regular unleaded gasoline; 93-octane premium does not improve performance for typical small mower engines and can contribute to running issues if it sits and degrades.

• Use: Fresh 87 octane unleaded gasoline
• Avoid: Old gas (more than about 30 days without stabilizer)
• Avoid: Gas contaminated with water or debris
• Avoid: Overfilling the tank (leave room for expansion)
• Use caution with ethanol blends: Many small engines run best on 0 to 10% ethanol (E0 to E10); higher blends can cause hard starting and fuel-system problems

Octane is mainly about resistance to knock in high-compression engines. Most walk-behind mower engines are designed to run correctly on regular fuel, so premium fuel typically does not add power, extend engine life, or reduce maintenance.

• Drain old fuel and refill with fresh 87 octane
• Check the air filter and spark plug condition
• Inspect the fuel cap vent and fuel line for blockage
• If the mower still surges or won’t stay running, the carburetor may need cleaning or service

Using the right fuel helps your MTD 12AGA2MP793 start easier, run smoother, and reduces fuel-system problems that lead to no-start or surging complaints.

For model identification and parts matching when you are servicing the mower, use how to find your appliance model number (and what it means for parts).

Last updated: January 2026

For the MTD 12AGA2MP793 gas walk-behind mower, the most common repairs are fuel-related no-start issues, ignition problems (spark plug), airflow problems (dirty air filter), and cutting or bagging problems caused by buildup or worn components. Many fixes start with basic cleaning and inspection.

• Won’t start or starts then dies: drain old fuel, refill with fresh gas, check fuel shutoff (if equipped), and inspect the spark plug.
• Runs rough or surges: clean/replace the air filter, check for stale fuel, and look for debris around the carburetor area.
• Poor cut quality or uneven cutting: check blade condition, deck buildup, and verify the cutting height is set evenly.
• Clippings not bagging well: clear wet clumps from the deck and chute, and inspect the bag for tears or poor fit.
• Hard to pull-start: check for a fouled spark plug, blade obstruction, or heavy deck buildup.

Some repairs involve routine-wear items. For this model, a common bagging-related replacement is the lawn mower grass bag 664P05322A.

Catching these issues early helps prevent hard starting, overheating, and poor cutting performance. Simple maintenance (fresh fuel, clean deck, clean filter) also reduces strain on the engine and drive components.

• Disconnect the spark plug wire before working near the blade.
• Let the engine and muffler cool completely.
• Tip the mower only as recommended for small-engine equipment (avoid spilling fuel/oil).

Last updated: January 2026