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Karcher K6.91 (no M )
I have a problem with my washer it does not run evenly and the power motor keeps revving the pressure seems lower than when I bought it brand new, I had to replace the fan blade on the top of the motor last year.
Answer this Question (1 Answer)
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Chris at eSpares says...
If the motor 'pulses' while in use as it stops and starts try using a different attachment. If the new attachment pulses the same there is a problem with the auto switch off part of the pump as it is cutting out to soon as the pressure builds.
Pressure Washer Microswitch Stock Number: ES538279
Genuine spare part for select models of Karcher pressure washers
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