controlling valve opening/closing

governing

injection

carburettion

minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame

temperature at which it solidifies or congeals

it catches fire without external aid

indicated by 90% distillation temperature, i.e., when 90% of sample oil has distilled off

SEA 30

SAE 80

SAE 50

SAE 70

above the piston

below the piston

between the pistons

any where

chemically correct mixture

lean mixture

rich mixture for idling

rich mixture for over loads