Please click on the pdf link above to see an exploded diagram in a new page then refer back to the parts list below where you will find the diagram numbers in order down the left hand side in brackets
PHBH
Choke sizes 26-28-30mm
Independent starting circuit with adjustment by separate jet
Left or right-hand idle mixture/air screw adjustment
35 or 36mm clamp on or 36mm elastic connection to engine
42mm plain orM42 x 1.25mm threaded connection for trumpet/air filter attachment.
30mm version available with piston operated accelerator pump
PHBL
Choke sizes 20-22-24-25-26mm
Independent starting circuit with adjustment by separate jet
Left or right-hand idle mixture/air screw adjustment
28.57mm clamp on or 31mm elastic connection to engine
38mm plain orM38 x 1.25mm threaded connection for trumpet/air filter attachment.