This evening I posted my boat on Ebay for sale. Photos were downloaded and didn't show up.

Not sure what happend but interested in adding them again. Is this possible?

If you modify the post and link the pictures from another site yes you can, If you want them in the main post and don't have them linked you will have to relist the item if I remember correctly.

sometimes it takes 2 -5 hours b-4 they show up.

Yes it may take a few hours but I have never had that happen .

Go back to the top of the add and click "revise my item " Then scroll till you find the picture section and see if they are there or you can add them at that time .

If they didnt show up on the preview before you submitted the auction then they may not have uploaded......if you have a pop-up blocker (like i do) you may need to dissable it during that upload time cause a small screen comes up saying they are downloading the pics......if all else fails i would email them directly or try and find a number to call and have them fix it if you cant upload any yourself