If the blade has a star pattern you have to be sure the blade mates the spindle properly. You should be able to turn the bolt in with your fingers. I usually allow the blade to slowly turn with the bolt/washer until the bolt pushes blade into the spindle mount. Then rotate and position the blade until it mates and locks onto the spindle... continue to turn bolt with fingers until it is snug. Then tighten to 50 ft/lb... which is hard to do with a short (less than a foot) wrench.
You should have a 18" breaker bar or better a torque wrench, and a scrap piece of 2x4 to use as a wedge to prevent blade from turning while tightening to spec.
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If the blade has a star pattern you have to be sure the blade mates the spindle properly. You should be able to turn the bolt in with your fingers. I usually allow the blade to slowly turn with the bolt/washer until the bolt pushes blade into the spindle mount. Then rotate and position the blade until it mates and locks onto the spindle... continue to turn bolt with fingers until it is snug. Then tighten to 50 ft/lb... which is hard to do with a short (less than a foot) wrench.
You should have a 18" breaker bar or better a torque wrench, and a scrap piece of 2x4 to use as a wedge to prevent blade from turning while tightening to spec.