This varies with the make and model of the pressure washer... pressure washers are rated in PSI for their maximum output using a 0˚ nozzle, and the electric ones are fairly weak, usually around 1400-1700 PSI, with some of the better gasoline powered ones reaching as high as 2500-3000 PSI.
Using a rotary turbo nozzle, like the ones described here
, will do a pretty good job of scrubbing/washing the topsides, deck and bottom. However, it will strip ablative paint pretty damn fast too.
In general, avoiding things like hatches and portlights with a pressure washer, unless you're a good distance away, using a fairly low power tip, is a good idea.
Teak should be avoided as I said previously, as most pressure washers will strip the softer wood and leave the raised grain, leading to a need to sand the teak more often.
Originally Posted by rmeador
For a total newbie like me (who does not currently own a boat, nor has ever used a pressure washer), what is a safe distance, and safe nozzle? Can you give some guidelines for safe pressure washer usage on the various parts of a fiberglass boat? I was considering buying a pressure washer if I ever get someone to accept my offer on a boat.
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