What is a flat slide carb?

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What is a flat slide carb?

A flat slide carb has a (duh) , flat slide. As in very thin, like a guillotine moving up and down in the carb mouth. This (in theory) gives less impediment to the air flow than a round slide. Downside is that a flat slide can’t have much of a cut away. Look at the bottom of a round carb slide.

What does the air screw do on a carb?

Engine vacuum lifts the fuel to pass through a small brass idle jet, or pilot jet (PJ), and then mixes with air flowing in from the idle air screw (a threaded brass part with a screwdriver slot at its outer end and a tapered needle at its inner end.)

What causes a 2 cycle engine to surge?

This is a serious condition, as a lean fuel mixture won’t properly lubricate a 2-cycle engine, which will cause costly damage to the cylinder and piston. If the gasket is damaged, it can allow extra air into the engine, causing it to run lean, and the RPMs will surge.

How do I fix my carburetor surging?

8:45Suggested clip ยท 114 secondsHow To Fix A Surging Engine on a Lawn Mower, Pressure Washer …YouTubeStart of suggested clipEnd of suggested clip

Why does my riding mower rev up and down?

A carburetor that’s incorrectly adjusted is a common cause of poor engine idling that results in hunting and surging. Fortunately, most lawnmowers have two screws that allow you to adjust the carburetor yourself. Then slowly adjust the screws tighter or looser in turn until the mower runs and idles smoothly.