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I've got a small engine (11 HP B&S) that has a gravity-fed fuel system, i.e. there is no fuel pump, simply a fuel line between the carburetor and the fuel tank. If I look at the short (~2-3") piece of transparent fuel line between the filter and the carburetor, I can see bubbles (rather large ones, maybe 1/2 the diameter of the fuel line) traveling from the filter into the carburetor.

Is this an indication of a leak in the line, the filter, or one of the connections? Should I be concerned, or is this normal?

I'm also experiencing a loss of power when the engine heats up, and I'm wondering if the bubbles could be related...

Mark
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1 Answers1

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Could be a possible air leak. This affects your mixture, and would likely be the cause of the problem. Have you tried replacing/tightening the clamps on the hose?

FossilizedCarlos
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