"fuel" line problem?

[jamesdad]

i have an 86 merc115 there is a small line that runs under the coils and into the block via a brass nut.this line is leaking,what is this for and would it cuase the engine to die or starve at higher rpms? thankyou james when i moved it the engine also stalled

 

[Karl_Childers]

Re: "fuel" line problem?

Sounds like a bleeder line to me. A ruptured bleed line could suck air and cause that cylinder to run lean and fry the piston. Run a compression check to make sure you are OK, and replace that line ASAP while being VERY careful not to snap off the brass barb it is attached to.

Rob

 

[jamesdad]

Re: "fuel" line problem?

will do thanks!

 

[jamesdad]

Re: "fuel" line problem?

but there is fuel coming out of it it can still suck air?

 

[Karl_Childers]

Re: "fuel" line problem?

do you premix? Is it a solid stream of fuel? or is it a dribble? At any rate, repair or replace the line and run a compression check.

 

[Chris1956]

Re: "fuel" line problem?

James, Those inline motors have a small (3/32") rubber hose from the lower main bearing to the upper meain bearing. This serves as a fuel recirculation system. Replace the hose and inspect the check valves. The lower one is a one way (out) valve. The upper is simply a brass nipple.

BTW- This will not cause the issue you have cited.

 

[jamesdad]

Re: "fuel" line problem?

thankyou, it does indeed seem to gotothe lowerbearing. for my other problem it seems to have resolved itself becuuse she now runs fine i may have had her overloaded. thankyou james