Marking positioning device for marine engine

The invention discloses a marking positioning device for a marine engine. The marking positioning device comprises a supporting rod and a fixing block. A positioning sleeve for positioning a marking steel seal is arranged at one end of the supporting rod, and a screw rod is arranged at the other end of the supporting rod. A positioning through hole is formed in the positioning sleeve, and the axis of the positioning through hole is perpendicular to the axial direction of the screw rod. A movable sliding sleeve is arranged in the positioning through hole. The fixing block is sleeved on the screw rod in a movable mode. A through hole is formed in the lateral side of the fixing block to accommodate an external fixing element. The marking positioning device for the marine engine is safe and reliable, and convenient to operate, marking efficiency can be improved, and labor intensity of workers can be reduced.