I don't want to be rude here but you need to take some lessons right away.
I don't think you can learn to sail by reading about it. You can learn the theory but you really can't put it into practice without seeing it live.
If I were in your area I would gladly come and sail with you. Where are you located?
The wind blows me 5 miles out no problem but getting back in is a nightmare.
You have a great boat and it is taking good care of you. Many members are offering advice on how to tack your boat and unfortunately no one has yet asked the most fundamental question.
What is wrong with your tacking?
a) The bow of the boat never gets through head
b) You get head
to wind and get stuck there (in irons)
c) the boat starts to tack and the genny gets stuck on the mast/spreader/shroud etc.
My good friend Bash suggests tacking more slowly. If you are getting caught in irons you might need to turn the boat more quickly.
Short answer to your question is that you should almost never have to furl the genny to tack. I have a 150 on my 26 footer and haven't needed to do this in 4 years of sailing.
Depending on the main sail and the weather
the main sail can have a huge impact on your ability to tack.
Contrary to my own advice - If you don't get lessons here is a tip that might help.
- Make sure the boat is moving well. A slow boat will surely get caught in irons. You may have to head down a couple of degrees for a minute to get the boat moving. Boat speed is key
- ease the main just slightly
- Come up close hauled but do not delay. This is one fluid motion.
- Continue to turn the boat - you must get "through" head to wind before the speed drops
- As soon as the genny luffs, release the sheet
- Start drawing in the new genny working sheet as soon as the genny "blows" past the mast (do not "drag" the genny across. It is hard on the genny
- Continue turning the boat until established on the new tack
- trim the sails
A 150 genny can be a handful single
handed. You could furl the genny in to 100% (clew even with mast) and then leave it there. Don't adjust it. Practice tacks with a 100 genny out for a while.
And please, get some lessons.