The fx is getting better as i put more fuel through it, and yes i initially synced the engines by rpm. The la still just barely pulls the fx around when it starts to bog down. Both of these engines got dumped when i rolled my boat, i simply over primed it by about 15 cranks to get fuel and oil in the engine and they both run the way they did before. I am, thinking about rebuilding my engine pod so that one is a puller and one is a pusher, the engines would be inline so that if the fx keeps acting the way it does it won;t affect the course as much. Also when one runs out of fuel or if it cuts i don't have to do big circles to shore.