Mariner Coughing Idle

[BirdChaser]

Can someone give me some ideas on what's causing this?<br /><br />I have a 1984 20hp Mariner. Carb was recently rebuilt & it runs really good above idle. But, at idle is another story...<br /><br />The best way to describe it is caughing. It seems to be running lean at idle & it idles really rough. Is there an idle mixture adjustment on this thing? I can only find a high speed adj.<br /><br />------------------<br />Find the birds & you've found the fish!

 

[Johnshan]

Re: Mariner Coughing Idle

Where is the high speed adjustment? I have an '85 Mariner 30 hp and was wondering where this is. Sorry I cant offer any help to you, thanks.<br />-John

 

[BirdChaser]

Re: Mariner Coughing Idle

The high speed adjust on mine is a screw that is just above the mouth of the carb. It is a brass looking screw head that should be almost flush with the face of the carb.