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    high pressure pump mercury optimax 225 humming noise

    Hi @ all, I have a mercury optimax 225, 2003, 201 h. since yersterday, suddenly my high pressure pump does a humming noise when I turn key to ignition... not every turn, but almost, sometimes there is the normal whhiiiip... if I started the engine and run for a few seconds, then turn the key...
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    Problems with main fuel pump relay on 225 Opti 2003

    Re: Problems with main fuel pump relay on 225 Opti 2003 ok, we will measure the A of the fuel pump...how much amp is usually..? the fuse has 20 and the relay is 30 A...? the fuse had to come befor the relay...or? this what we dont understand also the opti dont miss power... ok its a only...
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    Problems with main fuel pump relay on 225 Opti 2003

    Hi, we have problems the main relay whcht switches the fuel pump of our Optimax 225 (BJ, 2003, 108h) (trimrelais are identical) within the last 5 hours two of the relays blown ... :mad: each time the line (red circle) is concerned ... the plastic from the counterpart is fused to the plug ...
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