ORIGINAL: Hydro Junkie
Send a PM to OB Nut or Jerry Dunlap. They both have been running tunnels for years and know the outboard engines like the back of their hands. Not sure about OB Nut, but I do know that Jerry has several national championships in the various classes of outboard tunnels and would probably be more than willing to help you out
I did finish 2nd (behind JD) at the 2007 Tunnel champs in the D Sport class!