Mercury fuel question

J

jeep187

Petty Officer 3rd Class
Joined
Oct 2, 2008
Messages
89
If it is cold outside will the fuel inside the opening of the carb be a foamy milky texture color.?

Is it also normal to have a little fuel residue in the breather box?

Thanks in advance
 
mthieme

mthieme

Captain
Joined
Oct 6, 2007
Messages
3,270
Re: Mercury fuel question

First question - I've never experienced this. Sounds like moisture.
Second question - Yes
 
J

jeep187

Petty Officer 3rd Class
Joined
Oct 2, 2008
Messages
89
Re: Mercury fuel question

I'm nut sure where the moisture would be coming from. I have a fuel water seperator on the boat. The only thing is water could be coming through the cowl and possibly sucking in the breather box. I did notice the seal between the cowl and the oil fil is collapsed and dry rotted.
 
mthieme

mthieme

Captain
Joined
Oct 6, 2007
Messages
3,270
Re: Mercury fuel question

Dunno.
Condensation maybe?
Has it been sitting a while?
 
metriccrescentwrench

metriccrescentwrench

Commander
Joined
Oct 22, 2007
Messages
2,598
Re: Mercury fuel question

jeep187 said:
If it is cold outside will the fuel inside the opening of the carb be a foamy milky texture color.?
Click to expand...

I won't swear to it, but I'm pretty sure what you're seeing is the result of a small amount of water that was absorbed in ethanol containing fuel coming out of solution.
 
J

jeep187

Petty Officer 3rd Class
Joined
Oct 2, 2008
Messages
89
Re: Mercury fuel question

No the boat doesn't sit more than a week without use. I use the boat every weekend.
 
H

Harker

Chief Petty Officer
Joined
Sep 21, 2003
Messages
452
Re: Mercury fuel question

Condensation. Cold weather, warm motor with air velocity at the intake. I get it during duck season every year.
 
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