Finishes and details for mid year, 1967 911S

This set of IDS Webers were installed in June 1967 and show evolutionary changes in finishes and features from the IDA and IDS carburetors as introduced in March, 1966.

In no particular order:

Throttle bodies are as-cast aluminum and not treated with the yellow/gold finish

Air horns are nickel plated

Short throttle shaft end plates are finished in silver zinc plating

SEMS screws for high speed enrichment tube installation are silver zinc plated

Accelerator pump cam lever, top cover pin and the roller lever arms are nickel plated

All spring steel pieces are black oxide finished (typical)

Remainder of steel components including throttle body studs are zinc plated and yellow chromate finished including grub screws for the main venturis

Accelerator pump cover is early style without the reinforced edge

Accelerator pump bodies and top covers are zinc plated and finished with yellow chromate

The "folded-spring" shaft coupling is the updated version without notches for fixing bolt head retention

The accelerator pump cam-lever arm is the later style, IDA type with the longer lever arm and designed for use with the adjustable pump rod

The idle jet holders are the early style, non-o-ring type

The mixture screws incorporated cup washers with o-rings

Included are the rare to find, brass washers used between the air horns and the nylock hex nuts

The accelerator pump rods are the adjustable version unlike the fixed-length links used on earlier Webers

The fuel line ferrules used at the nipples on the banjo fittings are Cohline and are slip-on and not crimped