Black Smoke/Poor Idle

[sethjon]

Went to look at a 2000 boat wit a 5.0GL VP. It didn't start that well but ok. Once started, lots of black smoke and poor idle. It was also loud. I'm sure the exhaust bellows is shot, but would that have any other impact? What could be causing the smoke? Thanks in advance for the help.

 

[Bondo]

Re: Black Smoke/Poor Idle

Went to look at a 2000 boat wit a 5.0GL VP. It didn't start that well but ok. Once started, lots of black smoke and poor idle. It was also loud. I'm sure the exhaust bellows is shot, but would that have any other impact? What could be causing the smoke? Thanks in advance for the help.

Ayuh,.... A junk Carb, or Bad choke...

 

[sethjon]

Re: Black Smoke/Poor Idle

Ayuh,.... A junk Carb, or Bad choke...

Thanks for the come back Bond-o. I immediately thought carb too but figured the float sticking because of the hard starting but why the black smoke? What makes that happen? Also, due to the noise, I know the exhaust bellow is shot. Never did a VP. Any tricks to replacing it?

 

[Maclin]

Re: Black Smoke/Poor Idle

Black smoke is from an incompletey burned over-rich fuel mix.

 

[Bondo]

Re: Black Smoke/Poor Idle

Thanks for the come back Bond-o. I immediately thought carb too but figured the float sticking because of the hard starting but why the black smoke? What makes that happen? Also, due to the noise, I know the exhaust bellow is shot. Never did a VP. Any tricks to replacing it?

Ayuh,.... Black smoke is raw unburned fuel, it's runnin Way to Rich...

Which bellow ya talkin' 'bout,..?? on the drive,..??
or the boots on the exhaust, inside the hull,..??

 

[skydiveD30571]

Re: Black Smoke/Poor Idle

Black smoke is comes from an overly rich condition. Unburned fuel.

Is your drive an SX drive?

Edit: I type too slow.

 

[Don S]

Re: Black Smoke/Poor Idle

Do you change boats a lot? I was thinking you had a Ford engine, but when I checked that was several different boats ago. But only April.