A badly worn jet needle has a groove round
it, but less severe wear is invisible.Wear does, however, affect performance,
so replace the needle every few years.There are many needle sizes: be sure to
get exactly the right one. Remove the needle by loosening the grub screw in the
side of the piston.To remove the diaphragm carefully undo the screws of its
retaining ring.teflon auto oil seals
Convenient.
Lift off the retaining ring and diaphragm. Hold the diaphragm up to the light and check it minutely for the tiniest hole.auto oil seals.if it has become perished, hard or misshapen, renew it.Be sure to fit the new diaphragm the right way round and the right way up. There is a tab on its inner edge that fits into a recess in the piston.take care not to get oil or petrol on the diaphragm, and not to nick or tear it.Loosen the grub screw to free the needle.The diaphragm is held on by a ring and four screws; do not nick the rubber with the screwdriver as you remove them.
Pull the diaphragm gently and hold it up to the light to show any pinholes.park the dashpot top so that you can refit it to the chamber the same way round.auto oil seals.
Remove the screws and lift off the top carefully, making sure that the piston spring does not catch and so drag out the piston.
Check that the diaphragm, which will come out when you remove the piston, is not stuck down around its edge: it is easily torn.Pull the adjuster stop straight off. Remove the six float chamber securing screws. Lift off the float chamber without twisting or levering. One type of pin usually pulls straight out.teflon auto oil seals Convenient.
Pull the adjuster stop straight off.Remove the six float chamber securing screws.Lift off the float chamber without twisting or levering.One type of pin usually pulls straight out.
Lift out the piston, pulling it straight up so as not to bend the needle in its base. Note that on the diaphragm edge there is a tab that fits into a slot in its seating on the chamber base.
After reassembly, refill the dashpot with multigrade engine oil to just above the level of the brass piston inside the tube – or you can obtain a special SAE 20 oil made by the carburettor manufacturers.teflon auto oil seals Convenient.
Lift off the retaining ring and diaphragm. Hold the diaphragm up to the light and check it minutely for the tiniest hole.auto oil seals.if it has become perished, hard or misshapen, renew it.Be sure to fit the new diaphragm the right way round and the right way up. There is a tab on its inner edge that fits into a recess in the piston.take care not to get oil or petrol on the diaphragm, and not to nick or tear it.Loosen the grub screw to free the needle.The diaphragm is held on by a ring and four screws; do not nick the rubber with the screwdriver as you remove them.
Pull the diaphragm gently and hold it up to the light to show any pinholes.park the dashpot top so that you can refit it to the chamber the same way round.auto oil seals.
Remove the screws and lift off the top carefully, making sure that the piston spring does not catch and so drag out the piston.
Check that the diaphragm, which will come out when you remove the piston, is not stuck down around its edge: it is easily torn.Pull the adjuster stop straight off. Remove the six float chamber securing screws. Lift off the float chamber without twisting or levering. One type of pin usually pulls straight out.teflon auto oil seals Convenient.
Pull the adjuster stop straight off.Remove the six float chamber securing screws.Lift off the float chamber without twisting or levering.One type of pin usually pulls straight out.
Lift out the piston, pulling it straight up so as not to bend the needle in its base. Note that on the diaphragm edge there is a tab that fits into a slot in its seating on the chamber base.
After reassembly, refill the dashpot with multigrade engine oil to just above the level of the brass piston inside the tube – or you can obtain a special SAE 20 oil made by the carburettor manufacturers.teflon auto oil seals Convenient.
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