The microlight aircraft departed Spanish Point Airfield (EISP), Co. Clare, at 10.40 hrs, for a flight to Inishmore (EIIM), Co. Galway. When overhead Inisheer Airport (EIIR), the Pilot elected to land there. Engine power was reduced to idle at approximately 1,800 ft, and the aircraft commenced a glide approach to Runway (RWY) 31 at EIIR. On short finals the Pilot noted that the aircraft was low on the approach, and advanced the throttle lever in an attempt to increase engine power. This had no immediate effect, and the aircraft continued to descend, and touched down at the very beginning of the paved surface of the runway. The aircraft bounced, and at the same time engine power increased. It veered to the left, impacted a raised area south west of the runway and sustained substantial damage. The occupants of the aircraft were uninjured. There was no fire.