DON'T fill the fuel tank while the engine is running or still hot.
DON'T leave the nozzle in a closed position for more than a minute or two while the equipment is running. The pump may overheat.
DON'T try to repair a leak in the hose or connection while the system is under power.
DON'T wash pressure sensitive areas without testing first. Increasing spraying distance can allow for safe washing.
DON'T place any part of your body in front of the nozzle or point it at other people. The blast is so powerful, it can literally tear the skin off.
DON'T hold the nozzle too close to the surface or too long in one spot - the strong jet will gouge wood, dent aluminum side, erode stucco, and blast mortar out of joints in brick walls. Likewise, do not point the wand directly at windows, for obvious reasons.
DON'T pressure wash from a ladder - you'll need both hands to control the wand (when you turn it on, it has a hefty kickback, which can kick you off balance). Instead, use an adjustable extension wand to reach high places.
DO read your operation manual thoroughly to ensure safe operation of your generator.
DO make sure all guards and shields are in place and in good working order.
DO check oil levels before every use.
DO store your portable generator in a dry, clean area that is easy to get to. When the lights go out, you don't want to trip over things to get the power going.
DO set the generator outside or vent the exhaust outside to prevent carbon monoxide from entering the home.
DO attach a ground wire to the generator to assure proper grounding. Without proper grounding, the ungrounded system may use you for the ground rod and you could be electrocuted.
DO use fresh gasoline when possible. If the generator is likely to sit long periods of time before being run again, use a gasoline stabilizer.
DO dry your hands if wet before touching the generator.
DO plug appliances directly into the generator. Or, use a heavy duty, outdoor-rated extension cord that is rated (in watts or amps) at least equal to the sum of the connected appliance loads.
DO start your generator at least once a month and let it run for a few minutes. If yours has a battery, trickle charge the battery from time to time to ensure it is ready to go.
DO contact a licensed electrical contractor if you must connect the generator to the house wiring to power appliances.
DON'T run the generator in an enclosed area. Keep it away from the home's windows and doors.
DON'T use frayed or defective extension cords.
DON'T run the generator in the rain or snow. Keep it inside, under an overhang, or in a portable shelter if possible.
DON'T add gasoline to a generator that is running. Always shut off the generator and let it cool down before refilling it.
DON'T ever try to power the house wiring by plugging the generator into a wall outlet, a practice known as "back feeding". This is an extremely dangerous practice that presents an electrocution risk to utility workers and neighbors served by the same utility transformer. It also bypasses some of the built-in household circuit protection devices.