The cowl is 270 mm heigh and 265 mm wide at the fuselage. To the front, it narrows down to 250 mm. A Moki S180 (255 mm) will most likely fit, as well as a Saito FG-90 (250 mm) or a UMS 7-90 (230 mm). A UMS 9-115 (260 mm) may also fit, but it may become very tight. The UMS 5-125 (265 mm) is likely too large for this cowl.
Oliver