"I bough a 2001 Cobalt 262 wit
"I bough a 2001 Cobalt 262 with a 496GXI Mercruiser engine. During test run it ran great at about 3800 rpm. but if we go over 4000 rpm for 5 minutes it got overheated. The dealer took it back and stated that they've change everything from propeller, impeller...