tach not working and water temp question

Long Islander

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May 8, 2003
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I have a 1982 19' Renken with 2.5 120hp OMC sterndrive. <br /><br />My father in law gave me this boat, he said he never ran it with a thermostat and said you don't need it. <br /><br />Is this ok to run without? <br /><br />What is the normal operating temp in salt water?<br /><br />Also the tach is not working what should I look for on the engine? <br /><br />One more thing once i get the tach working what rpm should i not go over?<br /><br />Thanks!
 
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