Fire every cylinder with a dependable spark from the Autolite Spark Plug 4194. A spark plug supplies the high-voltage spark that ignites the compressed air-fuel mixture in the combustion chamber, and this one installs as a direct-fit replacement across a broad list of applications — from the 2008 Arctic Cat 50 2X4 and 2002-2004 Arctic Cat 90 2X4 to classic 1950-1953 Aston Martin DB2, 1946-1949 Bristol 400, and 1949-1951 Frazer Nash Fast Roadster models, plus many Honda motorcycles and ATVs and Can-Am and E-Ton machines.
- Core job: ignites the compressed air-fuel mixture to fire the cylinder on each combustion cycle.
- Wide coverage: listed for 153 powersports, motorcycle, and classic-car applications.
- Direct-fit replacement: for the specific years, makes, and models in the "Vehicles it fits" section.
Over time, spark plugs wear and foul. If a worn or fouled plug is the cause, signs it may need replacing include rough idle, misfires, hard starting, hesitation, or reduced fuel economy — diagnose the cause before replacing, since these symptoms can have other sources. This wide-range listing covers dozens of vehicles, so please confirm your exact application in the "Vehicles it fits" section.
Fitment: Fits a large range of applications; see the "Vehicles it fits" section for the full list. Manufacturer part number 4194.
Frequently Asked Questions
What does the Autolite 4194 spark plug do?
It supplies the high-voltage spark that ignites the compressed air-fuel mixture in the combustion chamber, firing the cylinder on each combustion cycle.
Which vehicles does it fit?
It's listed for 153 applications, including Arctic Cat 90 2X4, Aston Martin DB2, Bristol 400, Frazer Nash Fast Roadster, and many Honda, Can-Am, and E-Ton models. See the "Vehicles it fits" section for the full list.
What are signs my spark plug may need replacing?
Rough idle, misfires, hard starting, hesitation, or reduced fuel economy can point to a worn or fouled plug. Diagnose the cause first, as these symptoms can have other sources.
Is this a direct-fit replacement?
Yes, it's a direct-fit replacement for the specific years, makes, and models listed. Confirm your exact application in the "Vehicles it fits" section before ordering.
What is the manufacturer part number?
This is Autolite spark plug, manufacturer part number 4194.
