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whipper snipper stihl fs 38 - Page 4 Questions & Answers
Primer bulb on whipper snipper only fills up about quarter full when primed? Shouldn't it be full?
not necessarily, its a primer after all. Its job is to merely prime the carb with fuel, depending on what your operators book says, you may have to give it anywhere from 1 to 5 pumps. It shouldn't be sucking too much air but like most things after time they can wear and the valve may be letting in a small amount of air, if its not effecting the running of the machine then I wouldn't worry too much.
My still fs36 whipper snipper runs but wont rev out
The strimmer has a small engine and therefore very small fuel passages that are very easily blocked unless a near-surgical cleanliness is observed when fueling and the air cleaner maintenance is up to date and carefully carried out.
In my experience such fuel-related problems are most likely. It is worth checking the spark plug first considering how much easier that would be. In the case of a blackened condition begin by checking the air cleaner for fouling and the cold start for correct operation.
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