Hi Dave, welcome to the forum! Open up customer/main/product.tpl. The code you want to remove are these lines:
<tr>
<td width="30%">{$lng.lbl_sku}</td>
<td nowrap="nowrap" id="product_code">{$product.productcode}</td>
</tr>
{if $product.weight ne "0.00" || $variants ne ''}
<tr id="product_weight_box">
<td width="30%">{$lng.lbl_weight}</td>
<td nowrap="nowrap"><span id="product_weight">{$product.weight|formatprice}< /span> {$config.General.weight_symbol}</td>
</tr>
{/if}
Moving this to the Template Editing forum. Good guide to which template is which is at the top of this forum
