Carburetor Issues
See also
Membrane Carburetor Overview
There are two types carburetors commonly used in paramotors, membrane
(Walbro, Tillutson), and float bowl (Bing). Tuning each type is completely different. For that
matter, there are significant differences in tuning each model and
engine.
A carburetor endeavors to deliver the correct fuel/air mixture to the
motor through the entire throttle range. In a perfect world, carbs would
be made specifically for a motor but that would be cost-prohibitive so
engine makers select one that's best suited to their engine.
A few engine makers do some modifications to their carbs so be
careful and putting a stock replacement on the motor will degrade the
engine's performance.
Tuning means making whatever adjustments are required to get the
mixture correct through the entire throttle range. It also includes
replacing membranes, cleaning filters when applicable and insuring the
pop-off pressure is correct. Before tuning, make sure any fuel filters
or screens are clean and the reed valves are in good shape since
problems with the reed valves can appear to be carburetor problems.
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WG-8 carb used on the Top 80 engine. It has only one
mixture adjustment needle, the other is merely an idle stop.
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