Bold reference numbers in this section identify parts not shown in the figures alongside the text, but which can be found in the exploded view diagram.

USA models are equipped with an additional system with an evaporative emissions canister that prevents fuel fumes from being discharged into the atmosphere.

The hose (22) is connected to the canister (3); when the fuel has been filtered, it is returned to the intake manifolds via hose (5) and hoses (8) and (9). The hose (7) drains to the ground.

Loosen the clamps (6) securing the hoses connecting the canister (3) to the intake manifolds of the horizontal and vertical cylinders and the breather valve (23).

Disconnect the hoses (8) and (9) connecting the canister (3) to the cylinders and the connection hose (22) to the breather valve (23).