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WHY HIGH-STARTING USUALLY OCCUR IN YOUR GENERATOR AFTER LIVING THE FUEL TANK UNLOCKED

ENGINE HIGH_STARTING AND ITS MAJOR CAUSING FACTORS

High-starting in petrol generator had been a serious problem for the users, some of the high-starting may be temporal while some are a permanent problem which will require the service of an experienced technician to ratify.

Generators do not just start having the problem of high-starting with any root cause for it. Though there many factors that could lead to it, the temporary high-starting do experience after leaving the fuel tank to unlock for a long time, is a different factor.-

Petrol generators are mostly carburetor-based fuel-air inlet system unlike like some that use fuel injector and air suction system. The function of the carburetor is to allow air-fuel mixture at the required ratio into the inlet manifold of the combustion chamber. The principle of operation of carburetors is the same for both four-stroke engines and two-stroke engines.

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When in good working condition, the carburetor can make the generator function effectively in terms of starting of the generator and increasing or lowering its power output. It is the main controlling part of petrol generators such that their defect will also impact greatly on the engine performance.

Because the petrol generators use an internal combustion engine for power, the operation of the generator engine has similarities to that of car engines, although that some car engines do use fuel injectors there are some that were made earlier with carburetors.

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Carburetors seem to be seen easily in two-stroke engines than in the four-stroke.

HOW CARBURETOR WORKS

A typical carburetor used in petrol generators has a throttling lever bearing a circular metallic plate that acts as a valve in the opening and closing of air-inlet in the carburetor. The diameter of the circular plate is proportional to the diameter of the cylindrical hole that exists across the longitudinal axis of the carburetor.

At the base of the carburetor is a small detachable cup that carries the small quantity of petrol in it. The cup bears a unit that enables the fuel in it to go out in equal and steady flow regulation. It is the place that fuel goes from directly into the inner part of the engine.

During the engine operation, the carburetor lever will be at the position that allows for maximum airflow into it, at that position, the fuel outlet unit of the carburetor located above the small cup at its base will also be open to allow for maximum flow of the fuel from the cup.

In the process of the fuel coming out from the carburetor, the fuel will be atomized because the little volume of it will be pressured to pass through a nozzle. When the atomized fuel is out it will meet the air sucked into the carburetor as a result of the engine piston’s reciprocating motion and both of them will go into the combustion chamber together.

While there is a suction force dragging the air-fuel combination, another cycle of similar action will be repeated with equal mixture ratio.

Whenever a carburetor becomes faulty the following may have happened to the working process;

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The air-fuel mixture may have been altered leading to high-starting or lack power output control.

The fuel outlet nozzle below the cup may have been clogged by a dirt, which is a common problem if your generator fuel filter is not good or when you regularly allow the fuel in your generator to finish completely leading the generator turning itself off regularly.

Another unnoticeable problem is when the fuel pressurizing round plastic tube inside the carburetor cup has become stiff and would be able to force enough volume of fuel out, which will decrease the fuel volume against the air volume, hence the engine wouldn’t be able to start.

Though there are other issues related to carburetor problems, these ones are common.

THE EFFECT OF LEAVING THE FUEL TANK UNLOCK

The fuel tank of every petrol generator has a lock below it at the location where the fuel exits from the tank to pass through the rubber hose attached to the lock into the carburetor.

After using the generator, the operator is expected to lock the tank below the fuel tank to stop the flow of fuel while the generator is not in use, otherwise, the generator will have the high-starting problem the next time you want to start it.

The cause of such temporary high-starting problem may not be pointed out directly but some technicians believed that when the fuel flow into the carburetor while the engine is off, it will create undue pressure to the carburetor leading to some of them vaporizing and the when the engine is left unused for a long time the fuel in the tank may be lost completely through vaporization.

 

 

 

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Originally posted 2018-07-19 07:40:44.

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