Method for operating gas engines with a lean gas containing CH4 and mixing device for performing the method

The method involves dividing the lean gas in two partial streams, where the former partial stream feeds a venture gas mixer (3) which is mixed with an air flow of an air- or lean gas mixture. The air flow is supplied as jet stream. The latter partial stream feeds another venture gas mixer (3') which is mixed with the air- or lean gas mixture that acts as jet stream. The air- or lean gas mixture of a gas engine or a turbocharger is fed as ignitable gas mixture and is exit from the latter venture gas mixture. An independent claim is included for a mixing device for executing a gas engine operating method.