The starter is not the same as either GXV140 or GXV160 - they are all different designs. It is not impossible that it will fit the 160 more or less by luck. Carburetor is different too. I don't know about the coil: it isn't the same, because the GXV120 has a weird plastic boot at the spark plug end of the HT lead, but it may fit anway - probably depends on whether it is the same diameter flywheel. Throttle control and cable look similar but I think the 4 height lever mowers have larger diameter handles (the whole handle design is completely different, and much more elaborate on the 4 height lever ones).
