I think you should put the motor on Ebay, and then try to replace it. Having that much extra weight hanging off the back of your boat while sailing is not going to make for good speed, especially since it is not centered on the transom. The boat will be lopsided and heel really bad one direction. Your stern is narrow, so you don't have a lot of buoyancy in the rear of the boat, which is going to make it squat. You might be OK sailing down wind, but all other points of sail are going to be slower, unless you counterbalance with some weight up front.
It looks like you are sailing on all small inland lakes, and the Ohio river. That being the case, the motor is waaaay overkill. My 24 foot boat weighs 400 lbs less than yours. I use a 86 lb thrust trolling motor. It works fine, even in 20mph winds. Sell your motor on Ebay and buy yourself a 4hp, or switch to a trolling motor for about 400 bucks.