hi tried this and low and behold got a proper reading . the tube was installed sometime before i bought the boat and i always assumed it was working...
yes have done most things suggested , although the unit has been checked i am wondering if as in a previous post there may still be a fault with the...
they do seem ridiculously cheap, i guess one issue would be spare parts i know from owners of more expensive models that nozzles can cause problems ....
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