A wet inline scrubber using alkali scrubber fluid for reducing the amount of SOx in an exhaust gas produced by one or more engines of a marine vessel, comprising a vertically extending exhaust gas reaction tube, which comprises - a lower scrubbing chamber comprising ∘ a side inlet for the exhaust gas produced by the one or more engines of the marine vessel, ∘ a plurality of scrubber fluid injectors to inject alkali scrubber fluid in the exhaust gas present in the lower scrubbing chamber to partially scrub this exhaust gas, resulting in a first used scrubber liquid, ∘ a drain for used scrubber fluid at the bottom thereof, - an upper scrubbing chamber comprising ∘ an exhaust gas outlet at the top thereof, ∘ a plurality of scrubber fluid injectors to inject alkali scrubber fluid in the exhaust gas to further scrub exhaust gas which has already partially been scrubbed in the lower scrubbing chamber, resulting in a second used scrubber fluid, wherein the lower scrubbing chamber and the upper scrubbing chamber are fluidically connected through a lower chamber exhaust gas outlet guiding the partially scrubbed exhaust gas flowing from the lower scrubbing chamber to the upper scrubbing chamber, said lower chamber exhaust gas outlet comprising a reverse funnel extending from walls of the exhaust gas reaction tube upwards and towards a central opening, characterized in that along the circumferential border where the reverse funnel is attached to the exhaust gas reaction tube, one or more slit-shaped openings are provided that allow the second used scrubber fluid to flow from the upper scrubbing chamber to the lower scrubbing chamber and that allow the second used scrubber fluid to flow over the side inlet for the exhaust gas present in the lower scrubbing chamber. - a lower scrubbing chamber comprising ∘ a side inlet for the exhaust gas produced by the one or more engines of the marine vessel, ∘ a plurality of scrubber fluid injectors to inject alkali scrubber fluid in the exhaust gas present in the lower scrubbing chamber to partially scrub this exhaust gas, resulting in a first used scrubber liquid, ∘ a drain for used scrubber fluid at the bottom thereof, ∘ a side inlet for the exhaust gas produced by the one or more engines of the marine vessel, ∘ a plurality of scrubber fluid injectors to inject alkali scrubber fluid in the exhaust gas present in the lower scrubbing chamber to partially scrub this exhaust gas, resulting in a first used scrubber liquid, ∘ a drain for used scrubber fluid at the bottom thereof, - an upper scrubbing chamber comprising ∘ an exhaust gas outlet at the top thereof, ∘ a plurality of scrubber fluid injectors to inject alkali scrubber fluid in the exhaust gas to further scrub exhaust gas which has already partially been scrubbed in the lower scrubbing chamber, resulting in a second used scrubber fluid, wherein the lower scrubbing chamber and the upper scrubbing chamber are fluidically connected through a lower chamber exhaust gas outlet guiding the partially scrubbed exhaust gas flowing from the lower scrubbing chamber to the upper scrubbing chamber, said lower chamber exhaust gas outlet comprising a reverse funnel extending from walls of the exhaust gas reaction tube upwards and towards a central opening, characterized in that along the circumferential border where the reverse funnel is attached to the exhaust gas reaction tube, one or more slit-shaped openings are provided that allow the second used scrubber fluid to flow from the upper scrubbing chamber to the lower scrubbing chamber and that allow the second used scrubber fluid to flow over the side inlet for the exhaust gas present in the lower scrubbing chamber. ∘ an exhaust gas outlet at the top thereof, ∘ a plurality of scrubber fluid injectors to inject alkali scrubber fluid in the exhaust gas to further scrub exhaust gas which has already partially been scrubbed in the lower scrubbing chamber, resulting in a second used scrubber fluid,