Set the throttle-stop screw so that the
engine idles a little faster than normal.Turn the volume-control screw either
way, until the engine begins to run roughly.On most carburettors the volume
screw regulates fuel flow — on this type the volume screw’s position is low on
the carburettor body.toyota auto oil seals
TO GLOBAL MARKET .
On a Weber, the mixture-adjusting screw is sealed in many later types. Idling speed is adjusted by turning the throttle-stop screw.On a Solex, idling speed is adjusted by turning the bypass idle-speed screw, which is sealed by a plastic cap on later models.Turning it clockwise weakens the mixture, causing ‘hunting’ — a rhythmical rise and fall in engine speed.
Turning it anti-clockwise enriches the mixture, producing ‘lumpy’, irregular running.mechanical oil seals.
An air volume-control screw is placed higher up. Turning it clockwise enriches the mixture; turning it anti-clockwise weakens the mixture.
Find the two points at which hunting and lumpy running begin. Set the screw halfway between them, unless some other setting clearly makes the engine run better. Note the screw setting.
Reset the throttle-stop screw for a normal idling speed, and repeat the test with the mixture screw. auto oil seals.Probably this will result in the same final setting.Cleaning fuel-pump filters
A blocked fuel-pump filter will cause the engine to cut out intermittently, particularly at high speeds, and it may stop altogether.
Not all cars have a filter in the pump. Later models often have sealed, filterless pumps which do not need maintenance, and rely on filters elsewhere, mainly in fuel pipes or the petrol tank, or at the inlet to the carburettor float chamber.toyota auto oil seals TO GLOBAL MARKET .
The most common type of pump; if there is a sealing ring, check it.
This design has a cylindrical filter holder and disc filter.
The top of this one unscrews with the filter attached.dust oil seals.
Many cars have a mechanical fuel pump driven off the camshaft. The pump should be plainly visible on one side of the engine. If not, trace the fuel pipe back from the carburettor.
If the fuel pipe leads away from the engine towards the fuel tank, you may have an electric fuel pump. auto oil seals.Often this is at the back of the car, close to or immersed in the tank.
Disconnect the battery before servicing an electric pump – an accidental spark could ignite spilled petrol.
Clean all filters by washing them with fresh petrol. Wipe out the inside of the pump with a clean lint-free rag.
Make sure sealing gaskets are sound. Replace them if necessary. There may also be a sealing washer under the fixing screw.
Do not overtighten the screw(s) of the pump cover or it will leak and damage the pump. If the knob retaining a glass dome is overtightened, the dome may break.
Many electric pumps are SU, or copies built under licence. They are often in awkward positions, but must be removed to clean the filter.
Have two old pencils or rubber bungs handy to stop petrol gushing out of the disconnected fuel pipes.auto oil seals.
Note which pipe is which – the same applies for electrical connections. There may be one or two, depending on whether or not the pump is earthed directly to the car body.toyota auto oil seals TO GLOBAL MARKET .
On a Weber, the mixture-adjusting screw is sealed in many later types. Idling speed is adjusted by turning the throttle-stop screw.On a Solex, idling speed is adjusted by turning the bypass idle-speed screw, which is sealed by a plastic cap on later models.Turning it clockwise weakens the mixture, causing ‘hunting’ — a rhythmical rise and fall in engine speed.
Turning it anti-clockwise enriches the mixture, producing ‘lumpy’, irregular running.mechanical oil seals.
An air volume-control screw is placed higher up. Turning it clockwise enriches the mixture; turning it anti-clockwise weakens the mixture.
Find the two points at which hunting and lumpy running begin. Set the screw halfway between them, unless some other setting clearly makes the engine run better. Note the screw setting.
Reset the throttle-stop screw for a normal idling speed, and repeat the test with the mixture screw. auto oil seals.Probably this will result in the same final setting.Cleaning fuel-pump filters
A blocked fuel-pump filter will cause the engine to cut out intermittently, particularly at high speeds, and it may stop altogether.
Not all cars have a filter in the pump. Later models often have sealed, filterless pumps which do not need maintenance, and rely on filters elsewhere, mainly in fuel pipes or the petrol tank, or at the inlet to the carburettor float chamber.toyota auto oil seals TO GLOBAL MARKET .
The most common type of pump; if there is a sealing ring, check it.
This design has a cylindrical filter holder and disc filter.
The top of this one unscrews with the filter attached.dust oil seals.
Many cars have a mechanical fuel pump driven off the camshaft. The pump should be plainly visible on one side of the engine. If not, trace the fuel pipe back from the carburettor.
If the fuel pipe leads away from the engine towards the fuel tank, you may have an electric fuel pump. auto oil seals.Often this is at the back of the car, close to or immersed in the tank.
Disconnect the battery before servicing an electric pump – an accidental spark could ignite spilled petrol.
Clean all filters by washing them with fresh petrol. Wipe out the inside of the pump with a clean lint-free rag.
Make sure sealing gaskets are sound. Replace them if necessary. There may also be a sealing washer under the fixing screw.
Do not overtighten the screw(s) of the pump cover or it will leak and damage the pump. If the knob retaining a glass dome is overtightened, the dome may break.
Many electric pumps are SU, or copies built under licence. They are often in awkward positions, but must be removed to clean the filter.
Have two old pencils or rubber bungs handy to stop petrol gushing out of the disconnected fuel pipes.auto oil seals.
Note which pipe is which – the same applies for electrical connections. There may be one or two, depending on whether or not the pump is earthed directly to the car body.toyota auto oil seals TO GLOBAL MARKET .
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