I have an 8 hp Briggs I/C on a Little Wonder blower. About 2 weeks ago I cranked up the rpm's just by adjusting where the cable mounts at the engine. A week later I blew a head gasket. Now about 4 days later I blow another. All 7 or 8 bolts seemed to loosen up some from the vibration (may not have torqued them down enough). Unit is 4 yrs old. Question: would the rpm's possibly being too high blow a head gasket? Or would the second one have blown due to not enough torque on the bolts? Thanks for any help.