ORIGINAL: Mk23socom
not sure about the aluminum but I dont think that a few blades of grass would hurt anything, perhaps someone has experience that can tell me different?
OK I'm telling you "different"...
I had a blade of grass sucked into the intake which caused a dead stick as it wrapped around the "cat eye" needle exhaust.
Another time one made it into the cylinder and was not expelled.
Instead it stuck to the head walls, carbonized and lead to a ruined piston ring in very short order.
Grass does not belong in your engine.