edwelld

<p>Hi Dave</p>

<p>use the two stage washer under the head [next to the gear box] put head on select washer to centrally locate toothed spline shaft size, [might have to use two washers to space and use blade nut to tighten replace bayonet fit black plastic dome and you should be good to go. Did you get a 4 line version ? load line from large hole end thru to only 1/2" past other side, i would use the Red 4mm techniblade for best results and any nylon line around trees you want to keep and walls, put all lines in water before use to rehydrate them they last longer after this</p>

<p> </p>

<p>Les</p>