When should I worry??
Well again I'm new here so hang with me please. My motor >. 1990 3.0 lh rotaion mercuiser.<< I have been hear a random rapping, scratching noise. It seems to be happening more often that in the past. When out of the water, this very load noise seems to be comming from the left bottom rear of the motor, near what I thought was the atlernator, now I'm thinking it is the starter. after looking a listening a little more, is sounds like it is comming fomr the oil pan. <br /> My initial guess was flapper valve.. My hopefull guess is flapper, but as load as it is it's starting to worry my, and it will show itself anywhere from 700 rom :: 3000 rpm. Typically at start for atleast 5 :; 10 secs then it goes away and maycome back at random. All this testing has been done outside the wwater with muffs on, however I did notice it @ startup when I was on the lake last time.<br /><br /> My question is.. any guesses as to what this could be, and should I be worried about it since it comes and goes. again, I'm not sure eactly where is comming from but I do know it is really load, and seems to come from the bottom part of the engine. and is reall noticeable at start up, even before the engine fully cranks up..<br /><br /> Thanks,<br /> Distressed BOB
Well again I'm new here so hang with me please. My motor >. 1990 3.0 lh rotaion mercuiser.<< I have been hear a random rapping, scratching noise. It seems to be happening more often that in the past. When out of the water, this very load noise seems to be comming from the left bottom rear of the motor, near what I thought was the atlernator, now I'm thinking it is the starter. after looking a listening a little more, is sounds like it is comming fomr the oil pan. <br /> My initial guess was flapper valve.. My hopefull guess is flapper, but as load as it is it's starting to worry my, and it will show itself anywhere from 700 rom :: 3000 rpm. Typically at start for atleast 5 :; 10 secs then it goes away and maycome back at random. All this testing has been done outside the wwater with muffs on, however I did notice it @ startup when I was on the lake last time.<br /><br /> My question is.. any guesses as to what this could be, and should I be worried about it since it comes and goes. again, I'm not sure eactly where is comming from but I do know it is really load, and seems to come from the bottom part of the engine. and is reall noticeable at start up, even before the engine fully cranks up..<br /><br /> Thanks,<br /> Distressed BOB