How to change oil in a pressure washer

From the manual CleanShot 2050 Briggs and Stratton

Change Pump Oil
1. Drain engine oil and fuel from pressure washer
2. Use an 8 mm allen wrench to remove black pump oil cap between high pressure outlet and garden hose inlet.
3. Tiltl pressure washer to drain oil into an approved container until it drips slowly from pump.
4.Tilt pressure washer in opposite direction and empty premeasured pump oil bottle into same opening (a small funnel may be helpful) [THIS IS WHAT THE MANUAL SAYS-NOT CLEARLY WRITTEN IN MY OPINION OR WRITTEN BY SOMEONE FOR WHOM ENGLISH IS A SECOND LANGUAGE]
5. Install black pump oil cap and tighten firmly.
6. Set pressure washer in upright position. Add fuel and engine oil.

From the engine manual use synthetic 5w-30, 10w-30 from -20 degrees F to temperature of 100 degrees F.
Change oil after 5 hours of operation initially. Before tipping to drain oil, remove fuel from fuel tank by running until tank is empty. Remove oil cap and dipstick and tip engine. Keep spark plug side up. Or remove drain plug from the bottom of pressure washer with a ratchet and square extension and drain oil from bottom. (fuel does not have to be removed)

Dear joanfbarber,
Various power washers are filled with oil after the the head with the pistons is removed. The head must be removed gradually against the strenght of the piston springs. Some washers must be placed upside down for this to be possible. When putting back the head, it must be screwed down squarely. Besides changing the oil, it is recommended that all seal be renewed. If old oil is found milkey, then it has water in it. The main cause for this are scratched pistons. If the pistons are scratched they must be renewed.
Regards,
Fulltech.

Suggestion but allways beware for motor parts allways on the serial number that it has no modification on some days on other model or type motor for the pressure washer . maybe the ignition coil can be sometimes modificated beware of that kind of parts .
CleanShot 2050PSI Owner Manual