I liketo call mine a H in a Fancy dress. however a H has a little 152 inch engine the 350 has a 175 engine. the h if you used it hard would overheat. Ive never had the 350 get even close to overheating. There is a vent some place on the Hyd . If that vent gets clogged it will build too much pressure and no pump seal will fix it.