Whats the timing on a 81 f100 with 300 6 cylinder?

The 1981 Ford F-100 with the 300 cubic inch inline-six engine uses a distributor ignition system. There's no single "timing" number to give you. The timing is adjustable and needs to be set using a timing light and following the specifications in your owner's manual or a Ford repair manual for that year and engine.

The timing is usually specified as degrees Before Top Dead Center (BTDC) at a certain RPM (revolutions per minute), often idle speed. The exact specification will vary slightly depending on engine condition, altitude, and other factors. You'll find the proper setting in your service manual. Improper timing can damage your engine.

To find the correct timing for your specific truck:

* Consult a repair manual: A Haynes, Chilton, or factory service manual for your 1981 Ford F-100 with the 300 inline-six is your best bet. This will give you the precise specifications and procedure for setting the ignition timing.

* Find a mechanic: A qualified mechanic will have the tools and expertise to correctly set your ignition timing.

Attempting to set the timing without the proper information and tools can lead to engine damage. It's best to be precise.