Stihl BR 550 Technical Guide - Page 4

Page 4 Technical Information 08.2005 1.4 Blower holder For storage and transport: . Affix the Velcro tape to the blower tube, pull the tab through the cinch. 1.5 STIHL 4-MIX engine The 4-MIX engine works with mixed lubrication. Unlike a conventional four-stroke engine, the 4-MIX engine does not have any supply of oil in the crankcase. The engine is lubricated entirely with a mixture of petrol and engine oil. This design yields the following advantages: . Same fuel . Lower fuel consumption . Can be operated in all positions . Fewer emissions . Good acceleration . Compact size - attractive design . Advantageous power-to-weight ratio . Easy maintenance - easy to service . Pleasanter sound - lower noise level . Fewer vibrations . Lower starting force . Affix the blower tube to the handle opening of the back plate. TI_08_2005_11_01_02.fm