Mercury 25Hp Pull to prime button explanation “start your engine”
Mercury 25Hp Pull to prime button explanation and function “start your engine”
Turning this button will help you to adjust your idle.
Key Details for Using the Pull-to-Prime Button:
Cold Starts: Pull the knob out, start the engine, and push it in once it runs smoothly.
Function: It is not just a choke; it acts as a primer, sometimes requiring the operator to pull and push it 3–5 times to prime the carburetor.
Troubleshooting: If the button does not pull out, it may be jammed by a screw inside the cowling that restricts the mechanism.
Alternative Operation: On some models, it is recommended to pull the knob out, start the engine, and then push it in to prevent flooding.
Engine Type: This feature is most common on 1990s and older Mercury 2-stroke outboards.