FUEL LINES BAD???? FUEL ISSUES??? BOGGING DOWN?? READ THIS..

[Ant-Knee]

Hello To All,

I thought I would share some info that just may help someone out there..

I own a 98 merc 150 outboard V-6, S# 0G740674.

Long story short..

I had an issue that I knew was fuel related,
I rebuilt the carbs a few times, Rebuilt fuel pumps, Changed fuel filters, Fuel water separators. Primer bulbs
Went through the entire fuel system to no avail.. Just could not find my issue.. Just when I was gonna start going through the ignition
I figured let me check all the little bleed lines, The real small ones.. Well when I was done checking them and making sure they were all connected
I looked down at my hands and they were all black, I thought to myself, Where the hell did this come from??
Well it turns out it all rubbed off the bleed lines to my hands..I thought, That cant be good.. Then I rubbed my hand over the fuel lines, and the same ****..

So I decided to change all the bleed lines and fuel lines and walla, Problem solved..

Turns out the problem was the fuel lines and bleed lines, I did the carbs several times, But never thought bout the fuel lines, as they looked great.. They must have been breaking up inside and clogging the jets in the carbs , Even right after carb rebuilds....


If you are battling a fuel issue and just can't track it down, Don't over look the fuel lines along with bleed lines... I would never have thought they were bad at all bye just looking at them..If I did not realize the black on my hands I would still be trying to find this issue...

Thanks,

Ant..

 

[yzf125]

Would also be helpful to include your symptoms you were having at the time as to help others, glad you found your problem.

 

[Ant-Knee]

Sorry bout dat...


Problem I was having was a mid range issue,
with a slow smooth throttle up at about 1800 - 2000 RPMS engine would bog down and die.....
If you hit full throttle real fast, Then it would power through it and be fine..


Here is a video..

https://www.youtube.com/watch?v=YJVGu751n_o

 

[zul]

Great video. I'm having a similar problem. When you say 'bleed lines' which lines are you referring to?

 

[yzf125]

They are small crank case vent lines and they have small check valves on them.

 

[Ant-Knee]

Trying to post pic for ya..

 

[Ant-Knee]

Great video. I'm having a similar problem. When you say 'bleed lines' which lines are you referring to?

Here is a pic...
This is my 98 merc 150,



Not sure what motor you have...



Thanks,

Ant...