Su carburetor oil level

The S.U. carburettor is one of the simplest carburettors ever invented! The dashpot assembly is filled with oil of appropriate viscosity. If the spring is too weak, the piston will be elevated to a level higher than its optimum position causing the Dirty piston and suction chamber; Piston is sticking; Bent metering needle; Jet is not centered; Perforated or hardened diaphragm (Z-S); Dashpot oil level is low Carbalancer Solex Weber Zenith SU Carb Carburettor Balancer Air Flow Tool. a vent hole in the screw-in plastic top of the dashpot, the oil level should be i in. (I run dual SU carbs, but the principle is the same for Strombergs.) These carbs have a tapered needle that moves up and down in a fixed orifice to vary the fuel If it still doesn't want to turn. squirt an aerosol penetrating oil through the float valve In the factory machining of SU carb bodies there always seems to be some A fuel level is maintained in the float bowl by the float and float valve assembly. The following SU carburettors were used by Rover in the SD1 Start the engine and adjust the throttle adjusting screw on each carburettor so the engine If the damper cap has a vent hole drilled through it, the correct oil level is ½" above the The Hitachi variable venturi carburetors are of a simple elegant design. They are no Remove the oil cap Nut and check the oil level. Z Parts Tech: SU Carbs

Re-adjust the mixture strength if necessary. Finally top up the piston damper with the recommended engine oil until the level is 1 in. (13 mm.)

(I run dual SU carbs, but the principle is the same for Strombergs.) These carbs have a tapered needle that moves up and down in a fixed orifice to vary the fuel If it still doesn't want to turn. squirt an aerosol penetrating oil through the float valve In the factory machining of SU carb bodies there always seems to be some A fuel level is maintained in the float bowl by the float and float valve assembly. The following SU carburettors were used by Rover in the SD1 Start the engine and adjust the throttle adjusting screw on each carburettor so the engine If the damper cap has a vent hole drilled through it, the correct oil level is ½" above the

I have not had my SU's on my 1500's for long, but I have noticed that the lighter the oil, the more responsive the cars, this is especially true this past winter where the lower outdoor temps seemed to keep the heavier oil more viscous and the engine less responsive. In winter, if I used lighter, less viscous, oil, the engines' responsiveness

AUF 700 Mechanical Fuel Pump - Dismantling; AUF 700 Mechanical Fuel Pump - Reassembly; Fault Diagnosis; Choke Units and Thermos. Auxiliary Enrichment (Thermo) Carburetter ; Automatic Enrichment Device (A.E.D) AUH 300 Range; AUH 300 Range - Carburetter Automatic Enrichment Device (A.E.D) Fuel Pumps. SU Fuel Pumps - Timeline and Information; Fuel Pump Points Sticking On older SU carburettors, which have a vent hole in the screw-in plastic top of the dashpot, the oil level should be i in. (13 mm) above the top of the piston tube. On dustproof SUs, which have a hole in the dashpot neck instead of the top, the oil should be i in. (13 mm) below the piston top. SU Carb Dashpot Oil The purpose of the SU damper is to retard the rapid upward movement of the piston on the rapid throttle opening associated with acceleration. This delay in piston movement causes a momentary decrease in pressure at the throat, thus achieving a momentary increase in richness much the same as with an accelerator pump. Check the level of the dashpot oil – use 20w oil or specific SU dashpot oil. The piston rising without restriction prevents enrichment necessary for acceleration. Ignition too far advanced or retarded – ignition occurs while valve is still open. SU carbs are not that sensitive to oil level in the dashpots, and you've got the proper weight oil in there. All the oil does is regulate the carb pistons' movement during acceleration and prevent them from chattering during idle and cruise. If there's oil in there, you're OK.

In the case of carburetters fitted with dampers the oil should be filled to a level just below the top of the hollow piston rod, so that when the damper is fitted it does

The S.U. carburettor is one of the simplest carburettors ever invented! The dashpot assembly is filled with oil of appropriate viscosity. If the spring is too weak, the piston will be elevated to a level higher than its optimum position causing the

Also check the level of oil in the dashpot - the domed piston chamber at the top of the carburettor. The oil is there to slow the movement of the piston. The delay In the case of carburetters fitted with dampers the oil should be filled to a level just below the top of the hollow piston rod, so that when the damper is fitted it does