© STIHL Inc., Virginia Beach, VA     2013 US/STR
confidential
19. Fuel Tank
 If the tank is empty look down in the tank to see if it appears 
contaminated with debris or anything else that shouldn’t be 
there
 If the unit has fuel in it carefully remove the cap and wave your 
hand over the opening while smelling for a sour odor that may 
indicate old stale fuel
© STIHL Inc., Virginia Beach, VA     2013 US/STR
confidential
19. Fuel Tank
 If fuel is present carefully pour the fuel out in a pan and see if 
there is trash or debris, or any evidence of other contaminants 
such as water in the fuel
 This sample is 
contaminated with 
water and debris
 Dispose of fuel properly