06-22-2009, 10:04 PM
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#3
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ShabahZ280 is currently offline
Status: Admin & Mariah Fanatic
Join Date: Jun 2007
Location: Cincinnati, OH
Find me on the Map
My Year: 1999
My Model: Z280 MCC
My Engine: 7.4L MPI Bravo III
Thanks: 8
Thanked 367 Times in 274 Posts
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Re: Fuel Burn in GPH for 4.3L
Rick- I used to have a Sea Ray 180 with the 4.3L engine. It had relatively the same size tank as the Mariah, and the weights are within a few hundred pounds. I stuck around the same speeds as you, and would only occasionally open it up, when the water was like glass, and I was getting roughly the same as you.
Short of adding a fuel flow gauge or a GPS with fuel monitoring capability, (they're all at least $400 - which buys a lot of gas!), there's really no way to accurately judge the GPH. To maximize your fuel economy, just make sure your boat is trimmed properly, make sure your carb is tuned, engine's in good shape, the prop is balanced and the correct pitch. I'd say just enjoy it, your tank's small and your boat gets pretty good fuel economy! At least you're not filling up a huge tank for a big block, like a lot of us are...
Oh, and by the way, I totally want to go boating with you.  
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Chris
-1999 Mariah Z280 MCC, 7.4L MPI Bravo 3 DuoProp
-2000 Mariah Shabah Z250 Limited Edition, 7.4L MPI, Bravo 1 (Sold, but not forgotten!)
-Formerly known as ShabahZ250
-USCG Licensed 50 Ton Near Coastal Master Captain with Towing Certification
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