I have the 1995 Tiara open with a pair of 2000 L29 7.4, My fuel burn is an average 8.2 gals per hour. any opinion on the fuel burn. Today 46 gal burned in 6 hours trolling most of the day. I ran at 3200rpm 3400rpm at 21-23 knots for about 3miles Is that about right on the burn with these motors