Description:
Autolite Xtreme SportTM spark plugs are designed with an iridium-enhanced fine-wire center electrode to provide better ignitability*, faster fuel combustion, and a more focused ignition. Upgrading to iridium will equip your small engine equipment with greater ignitability and 21% less hydrocarbon emissions than standard plugs, resulting in better fuel efficiency and horsepower.
Features and Benefits:
- Engineered with an iridium-enhanced fine-wire center electrode that delivers greater ignitability over standard non-fine-wire spark plug.
- Its high alumina multi-rib ceramic insulator provides thermal conductivity and superior insulation for increased strength.
- The tapered ground electrode provides improved ignitability for more efficient and smoother starts.
Specifications:
Center Electrode Core Material:
Copper
Center Electrode Design:
Fine Wire
Center Electrode Insulator Tip Projection:
0.024 in.
Center Electrode Insulator Tip Projection:
0.61 mm
Center Electrode Projection:
Short Projection
Center Electrode Tip Material:
Iridium
Core Nose Length:
0.206 in.
Core Nose Length:
5.23 mm
Electrical Terminal Type:
Removable Nut
Ground Electrode Quantity:
1
Ground Electrode Tip Design:
Taper Cut
Ground Electrode Tip Material:
Platinum
Insulator Height:
1.98 in.
Insulator Height:
50.29 mm
Insulator Material:
Ceramic
Manufacturer Heat Range:
15
Briggs & Stratton #:
557039
Champion Spark Plug #:
653
Champion Spark Plug #:
661
DENSO Auto Parts #:
IU27A
DENSO Auto Parts #:
IU27D
Manufacturer Warranty:
84 Months
