MowerMike
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This video explains why some brands are more expensive than others. Half crankshaft engines are rated for far fewer hours of operation than full crankshaft engines. The sad thing is that some low quality brands like Ryobi are priced almost as high as much better brands like Echo.
Although the narrator states that the engine crankshaft type cannot be seen externally, you can tell from the location of the starter cord. If it's on the side of the engine and the recoil housing is visible, then the engine has a full crankshaft with bearing support on both sides. If the starter cord is in the middle and the recoil mechanism is not visible, then it has a half crankshaft. If you ever have a problem with the cord or recoil mechanism on a half crankshaft engine, then it's pretty much unfixable and ready for the trash.
Although the narrator states that the engine crankshaft type cannot be seen externally, you can tell from the location of the starter cord. If it's on the side of the engine and the recoil housing is visible, then the engine has a full crankshaft with bearing support on both sides. If the starter cord is in the middle and the recoil mechanism is not visible, then it has a half crankshaft. If you ever have a problem with the cord or recoil mechanism on a half crankshaft engine, then it's pretty much unfixable and ready for the trash.