I had the same problem with my jabiru J430 the last 3 times in flight.Just after take off the engine start to loose bit power,then after 10 sec the one EGT went up and the engine start to run rough.Apply carb heat and after 15 sec the engine was running normal.I climb to 2000- ft AGL and 15 min in flight 2850 rpm and fuel flow 20 liter/hour and carb heat on from first problem i notice one EGT went up and the other came down i bit.After n few sec power less and engine run rough for 10-15 sec.There after it happens once agian and i landed,Any suggestion ,was in for 50hr service and is the same after service.Time on engine 620hr.One thing that is funny is the fuel flow on take off showed 21 liter and after i turn the fuel pump off the fuel flow went up to 29 liters (should be 37 liters) and in straight and level it settle on 20 liter again.
Christo
