I've just bought a Mercury model 402 (40 HP 2 cylinder). Model year is 1976, SN 4362XXX.<br /><br />What is the little round plug located above the cavitation plate on the exhaust housing?<br /><br />The one on my motor is in poor shape. Before I take it out, I want to find out what it is - just in case it falls completely apart during removal.<br /><br /> <br /><br />Thanks,<br />Carl<br /><br />PS: I gotta get this fixed pronto, cuz my better half wants to take the motor out for a spin very soon!
<br /><br />Anything that rare...we should sell 'em on e-bay !<br /><br />Thanks for reading, Chuck