pressure washers burn out quickly

I bought one of these 100 dollar pressure washers (around 13amps and
1000 or so PSI output) and after a few weeks, it started to slow down
quickly and smoke and died. I borrowed my friends who had it for a
while but used it for a few car washes only and burned his out to. Is
it possible because they are using vacuum motors instead of the more
expensive continuous duty brushes motors? Other than that, the pump
and etc. are the same design.

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