Small Engines (Lawn Mowers, etc.): wiring for new engine on Snapper, briggs and stratton, old briggs

Question
Thanks for all your help and time.  I am stuck and confused while the grass is growing higher.  I have good mechanical skills but am very weak on the electrical.  I have replaced a B&S 10 hp engine on my Snapper rear engine rider with a new B&S Intek 14.5 hp engine.  I thought this was going to be a plug-an-play swap but was mistaken.  My research leads me to believe that the old electrical system was a dual circuit and the new one is a 5 or 9 amp regulated system.  Specs are listed below and I have posted detailed pictures of the mower, engine and harness on PicasaWeb.
http://picasaweb.google.com/MarcConner/Snapper_Briggs_145

Snapper Model:  281016BE

Old Briggs and Stratton 10 HP Engine:
Model:   28A707
Type:    0122-02
Code:    970226ZA

New Briggs and Stratton 14.5 Engine:
Model:   280J07
Type:    115 E1
Code:    050302ZE

I have also taken pictures that can be seen at:  
http://picasaweb.google.com/MarcConner/Snapper_Briggs_145

The engine is on and ready to start but I am lost concerning the wire harness hook-up.  I believe I will have to modify the engine harness for the fuel solenoid shut-off.  An older gentleman at a local repair shop told me to remove the solenoid, cut the needle off and reinstall it, but I am hesitant to do that,…maybe as a last alternative.  Any help is very appreciated but the more specific, the better.  

Thanks again,
Marc  
Email: jomaco24@yahoo.com


Answer
The fuel shut-off situation is an easy one. It operates with the key switch. Power on when the key is on , power off when it is off. Find any wire that stays on when the key is on, and off when the key is off, and run a wire if it is a single wire set-up. If it's a two wire then run a ground off the ground wire of the solenoid and to a good ground. Any one telling you to just ruin a $65.00 fuel solenoid is a fool, and you can tell him I said so, the rewiring of that is child's play. Stay away from that hacker in the future. That solenoid is there for a reason, a safety reason. It also stops any further fuel from entering the carb at shut down, so there is no little after run, or backfiring, or flooding so the next time you start it, it does so easier. was that the only wirng question?.......Tom