I believe they are the same as the other soft tail 2004 bikes 1455cc.
No
The 2004 Harley-Davidson Deuce Screamin' Eagle was equipped with a 103 cubic inch engine, which is part of the Twin Cam family. However, it's important to note that the 103 cubic inch engine was not standard for the Deuce model in 2004; it was introduced in later years. The 2004 Deuce typically came with a 88 cubic inch engine.
1 inch.
12 volt.
On a 2004 Harley Davidson Fat Boy, the engine oil drain plug is located on the bottom of the engine oil pan. It is typically positioned towards the rear of the pan, near the center. You will need a wrench to remove the plug when draining the oil. Be sure to place a drain pan underneath to catch the old oil.
4.2 gallons
No. It has a carburetor.
It is 12 volts.
2004 fatboy oil change
You can't. You'll have to buy a manual.
98 horsepower
Saw online the gap is .040