I added a 9.9 suzuki Kicker, currently have a 115 Suzuki for main motor. I want to run both engines off the main fuel tank. do I need a separate primer bulb for each motor. I think I could use 1 primer bulb and connect the kicker motor off of a tee in the main line. Friend thinks the main motor may suck fuel back out of the kicker. Any Thoughts?????