Small engine running problem

Is the bulb leaking air except when you cover the leak with your finger?

Pete Keillor

Hah! I was thinking "air leak", but I couldn't make that consistent with everything working when he had the bulb pressed in.

It may not be a leak in the part of the bulb that you cover with your finger -- it could be a split around the edge, that you compress when you push the bulb in. In fact, that may be more likely -- those bulbs flex the most right at the base, that's where you'd expect one to split from over use or from age.

Sounds like a Tecumsch I have on my Craftsman high wheeler. Mine is kept where it is very hot [90 to 100] on most summer days and very dry. Any thing rubber that is under stress lasts but a few years. My advise, get a parts breakdown and order all new rubber parts. I just replaced the smog tube and the 'O' ring on the float bowl. This reminds me to order the a new bulb next time I order part from that CS Co [Sears that is].

CP

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Upon further thinking, if this engine is equipped with a smog system check the short hose from it to the carb. If it is shot you may be losing all your vacuum to suck in the gas. If it is a horizontal it may be hidden under the flywheel.

CP