Another B&S Engine mystery.

[LittleBill21]

Perhaps ....... But I've been using them on five machines without issue for a couple decades until this mystery.

I also have never had a single issue with them

 

[SARG]

So I just mowed with the Husky for almost three hours and when I observed the filter there was still what appeared to be air bubbles entering with the fuel feed. They were very much smaller than what I noted yesterday and the situation does not appear to effect the machine operation in any way I can note.
I'll have to study on how difficult it would be to replace the fuel line to the tank ........ I do have a couple boxes of line in stock.

 

[ning]

You should really replace those barbless filters.
Doom, despair and agony they will bring

 

[SARG]

I will certainly give that consideration .... if I live long enough to use up the twenty-plus I have in stock ..... which is doubtful.

 

[sd455dan]

So I just mowed with the Husky for almost three hours and when I observed the filter there was still what appeared to be air bubbles entering with the fuel feed. They were very much smaller than what I noted yesterday and the situation does not appear to effect the machine operation in any way I can note.
I'll have to study on how difficult it would be to replace the fuel line to the tank ........ I do have a couple boxes of line in stock.

So are the air bubbles present when a "cold" engine start up takes place?

If so then yeah sounds like a bad fuel line.

My boat and that fuel line never smelled like gas but the line had to have microscopic perforations allowing air to enter guessing from old age.

I have also noticed a drop in the quality of some bulk fuel line I purchased recently for chainsaws. This unbranded yellow stuff did not last much over a year.
I bought some Gates black line in various sizes and so far so good .

 

[SARG]

So are the air bubbles present when a "cold" engine start up takes place?

If so then yeah sounds like a bad fuel line.

At start up there was minimal "bubbling" noted....... the filter filled with fuel with a slight air gap at the upper most portion. After mowing & the machine was hot the "bubbling" within the fuel flow was much more notable.

 

[tomplum]

Fuel lines seem to be one of those neglected things. IE folks that jam a bigger fuel filter and ruin the line for the proper filter. Deteriorated, hard lines too. These barbless went around a few years back. I had leakers, lines that came off. I feel that the barb is more apt to seal and of course resist a push off. On a decent line, on your own stuff- good with me. Not so much for retail service. There's a better way to go.

 

[WranglerX]

At start up there was minimal "bubbling" noted....... the filter filled with fuel with a slight air gap at the upper most portion. After mowing & the machine was hot the "bubbling" within the fuel flow was much more notable.

Again, replace fuel line....

@#$%&* B&S. Hard Starting....

OK,,, Its a B&S Intec twin 22HP in a JD L120 mower and it has to be the most miserable starting engine ever... IF it sits 6-8 days It just does not want to start (dry fuel bowl in carb?)... When it finally starts ( resorting to jump box and prime) I can see air bubbles coming in inlet side of...

www.tractorbynet.com

 

[jaxs]

Rather than watching bubbles and trying to eliminate them spend time washing deck or something else productive. It isn't atmospheric air you are seeing, it's liquid turning into gas as result of heat. Same principle as bubbles forming on floor of pan on the stove then ultimately breaking water surface as it comes to rolling boil. Before automobile carburetors had vent tubes in bowl engines would "vapor loc" as result of gases displacing liquid in bowl.

 

[two_bit_score]

Rather than watching bubbles and trying to eliminate them spend time washing deck or something else productive. It isn't atmospheric air you are seeing, it's liquid turning into gas as result of heat. Same principle as bubbles forming on floor of pan on the stove then ultimately breaking water surface as it comes to rolling boil. Before automobile carburetors had vent tubes in bowl engines would "vapor loc" as result of gases displacing liquid in bowl.

Sounds right.