add_filter( 'woocommerce_single_product_carousel_options', 'filter_single_product_carousel_options' );
function filter_single_product_carousel_options( $options ) {
$options['slideshow'] = true;
$options['animationLoop'] = true;
$options['slideshowSpeed'] = 3000;
return $options;
}
https://gist.github.com/WpComet/4a802a56817448e3dd425b2efcad294f