Please be aware that these downloads are for reference purposes only and must be officially updated and amended by a qualified person to be regarded as an official document for your aircraft or engine.
Please check the Official Limbach downloads page for latest bulletins
Fuel Information and Data Sheets:
Here is a recording of detonation caused by 6 week old stale unleaded fuel. It is the “rattling” type sound behind the main engine noise.
Australian unleaded fuel can contain significant quantities of light volatile aromatics which boost the RON rating but they evaporate quickly. Some fuels can lose their rating in a matter of weeks, which can lead to detonation in your engine. Please read the data sheets carefully and avoid using unleaded fuel that is more than a week or two old. If you have old fuel in your tank, drain it out and use it in your lawnmower.