Hello; My friend Al has a GB cub on floats with a Saito 80 in it that is just perfect. He tried an OS 48 FS, not enough to get it off the water. Then he tried a GMS 61 two stroke, plenty of power but wrong sound, so I lent him a Saito 80, and he was sold, and went out and bought one for his cub and now thinks it's perfect.