Hi BriggsHandy,
The AG43CEU11 was a revised spark plug and is commonly found in Ford 5.4 Litre V8.
Ford has encountered issues with spark plug breakage in several of its V8 engines, particularly the 5.4L engines from the early 2000s, where the spark plugs could become stuck in the cylinder head, leading to the possibility of breaking when attempting removal. To address this issue, Ford made several changes and recommendations:
Combustion temperatures typically range from around 1,370°C to 1,650°C in a 5.4 V8.
Combustion temperatures typically range from around 593°C to 870°C in a Briggs OHV motor.
The higher combustion temperatures can contribute to increased carbon buildup in an engine.
While it's not impossible for a spark plug to seize in a Briggs & Stratton 4-stroke OHV lawn mower engine, it is typically less common due to lower combustion temperatures, proper maintenance, and the engine's design. However, it's still important to regularly check and maintain the spark plug to avoid any potential issues. If a plug does become difficult to remove, using penetrating oil and appropriate tools carefully can help prevent damage to the engine.
Cheers
Max.
