When the engine is cold and you try to start it with the pull cord, the engine is running at an extremely low RPM. It is also cold, so it needs a very rich mixture to start. This is where the choke plate comes in. When activated, the choke plate completely covers the venturi. If...
How do I know if my ATV is running rich? A black dry fluffy colored plug iscaused by deposits from a carburetor that is running too rich (too much gas), or excessive idling on some engines. Black smoke coming from the exhaust is a sign of a rich air/fuel mixture. How can I make ...
A damaged diaphragm will have symptoms of the motor being able to idle well but not being able to take ANY throttle. If you think you may have a damaged diaphragm, check for any pinholes with a bright light behind the rubber, pulling on the edges to stretch the diaphragm a bit. If ...