Seagulls are small displacement motors but are designed specially to move heavier hulls. This is not a throw away motor. We still provide parts and service for motors that are several decades old. We can and still order replacement parts from our supplier in England. Seagulls are designed to move displacement hulls -lots of torque at low rpms.
All seagulls work on leaded or unleaded fuel.
But they, like any two cycle motor, smoke, vibrate and make noise. Many of them don't take well to replacement parts and they spit and hiss a lot. So stand up for that little seagull of yours. And watch out for that spousal unit too. Your seagull should start by the third pull or there is something wrong.