Hello Chaps,<br /><br />My 60HP Marinier (1990) has a Quicksilver control, when I start her up in the test tank a high pitched beep noise can be heard. I dont get the noise in the sea. I t happens as soon as I turn the key. If i leave it for a while then try it it goes but soon comes back quit quickly. Is this an engine overheat noise ie its not sucking enugh water up to cool it cos the test tank is too shallow or it it an oil or other problem? (Its a premix 50:1).