![]() When the regulators are twisted, the fuel mixture is enriched, and when twisted, the mixture becomes lean. A screw (15) is also used to adjust the idle speed. To adjust the amount of fuel entering the diffuser through the nozzles, a screw (13) is used. After the chamber (16) is full, the membrane (18) returns to its original position, and the valve (14) closes.įurther, when the motor is running, all of the above processes are repeated.After opening the valve (14), a new portion of fuel enters the chamber (16). Since the volume under the control membrane (18) is connected with atmospheric air through the channel (19), the membrane goes up, opening the valve (14) by means of the lever (17).The finished mixture enters the cylinder, where it is compressed by a rising piston and ignites at its correct point from the spark generated by the spark plugs.Gasoline, mixed with air, begins to spray. At this time, fuel from the chamber (16) is sucked through the jets (11,12), after which it is mixed with the flowing air.The position of the throttle (9) determines the amount of air entering the carburetor chamber, as well as engine power and the number of revolutions. A vacuum is created in the diffuser during the suction stroke.The cavity, which is located below the membrane, is connected to the atmospheric air through the hole (19). The valve (14) by means of a lever (17) is connected to the membrane (18). ![]() Further, its path lies through the inlet valve (3), the exhaust valve (5), through the strainer (6), the fuel channel (10), passes by the needle (14) and fills the chamber (16) having a control membrane (18). Gasoline enters the carburetor through the fitting (2). It is precisely with the participation of gasoline leaking from the tank membranes (4). Therefore, the operation of the pump is synchronized with the operation of the engine. Pressure drops make the membrane move (4). The piston located in the cylinder, making a reciprocating motion, successively changes the pressure in the crankcase (vacuum or pressure increase). Pulse channel (1) connects the impulse chamber of the pump to the crankcase, namely, to its internal volume. After the engine has started, it needs to be opened, otherwise, the motor will immediately stall. It must be closed if you intend to start the unit. Its amount affects the power that the engine develops. Throttle (9) adjusts the amount of air drawn into the carburetor. The fuel pump itself, the jets and the system used to control the flow of the fuel-air mixture can be built-in or installed externally. Through these channels, the flow of air draws in gasoline. The smaller this hole, the faster the air flows, and the higher the level of its rarefaction in the zone with the smallest diameter.Īt the top of the diffuser are fuel channels (11.12). Air is sucked in by the motor through this nozzle. Gearbox grease replaced with the proper expensive Stihl stuff.At the bottom of it is a diffuser, which is also called venturi nozzle (18). I then took this short video clip to show you the result.Ī bit boggy I think still so what’s you advise for which screw to now turn & which way.īlades look fine when running so not bent etc & I’ve also lubricated them with spray oil. L screw in until seated then 1 turn back out.Īt this point I thought it was going to stall so now over to the LA screw of which i turned clockwise until the blades started to move then half a turn anti-clockwise. Hedge was only say 30 ft long & trimmer must of stopped / stalled / died say 3 time. Playing with the throttle is little until it sounded ok I then gave it nearly full revs & started to cut the hedge. I noticed that when I touched the throttle it was boggy & mostly died. Today I started it & waiting a minute or two for it to warm up. I adjusted the carb what I thought was correct a month ago & did a hedge no problem. I assume the carb is the original so some wear is expected.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |