I have an XT3300 Extreme that I bought without an engine. I bought the engine and assorted parts and planned on putting it all together myself......Well time has gotten away from me again and I wimped out and took the mower/parts to a local shop. They got the engine installed OK, BUT they now say the T box was installed backward and causes the pumps to not build pressure. Is this even possible, or am I being taken for an expensive ride?:frown: