I have an old 1988 motor but it has not done more than 100 hours. Problem is that it has not run for last 6 years. Fuel tank de-rusted and re coated - fuel system filter and pipes cleaned and carb cleaned with carb cleaner and left to soak for over a month in acetone. It now runs perfectly on throttle but cuts out on idle. What are starter air settings and if it requires further cleaning what should I do?