How to inspect a spark plug for issues such as bridged gaps, deposit buildup, oil fouling, carbon fouling, normal burning, pre-ignition, overheating, and fused deposits on 2005 Mercury Mountaineer?

Check the spark plug, look for bridged gaps and deposition of oil or carbon foulings. Clean if necessary. Spots of oil fouling (wet, black deposits) and carbon fouling (black, dry deposits). Check normal burning (light tan deposits), overheating or damage, and change a spark plug as required.

OEM 2005 Mercury Mountaineer Spark Plug

Ignition Spark Plug

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2 Spark Plugs found

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2005 Mercury Mountaineer Spark Plug Part Number: AGSF-32P-MX
$6.04 MSRP: $9.35
You Save: $3.31 (36%)
Ships in 1-3 Business Days
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Product Specifications
- Replaces: AGSF-32P-M, AGSF-32P-MF4, SP-493
- Condition: New
- Fitment Type: Direct Replacement
- SKU: AGSF-32P-MX
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following 2005 Mercury Mountaineer Submodels:
- Base, Convenience, Luxury, Premier | 8 Cyl 4.6 L GAS
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2005 Mercury Mountaineer Spark Plug Part Number: AGSF-22F-MX
$5.52 MSRP: $8.76
You Save: $3.24 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaces: SP-500, AGSF-22F-M
- Condition: New
- Fitment Type: Direct Replacement
- SKU: AGSF-22F-MX
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following 2005 Mercury Mountaineer Submodels:
- Base, Convenience, Luxury, Premier | 6 Cyl 4.0 L FLEX, 6 Cyl 4.0 L GAS

2005 Mercury Mountaineer Spark Plug

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2005 Mercury Mountaineer Spark Plug Parts Q&A

Q: How to inspect a spark plug for issues such as bridged gaps, deposit buildup, oil fouling, carbon fouling, normal burning, pre-ignition, overheating, and fused deposits on 2005 Mercury Mountaineer?
A: Check the spark plug, look for bridged gaps and deposition of oil or carbon foulings. Clean if necessary. Spots of oil fouling (wet, black deposits) and carbon fouling (black, dry deposits). Check normal burning (light tan deposits), overheating or damage, and change a spark plug as required.