Fuel consumption help

[Col]

A friend of mine has just bought a Sunseeker Thunderhawk 43 with twin Volvo 740's ( 7.4ltr petrol duo prop )
He hasn't used it yet, but does anyone know gal per hour that it should use.
He thinks it's about 30 gph cruising. Is that about right?

 

[jfm]

That's too low I would guess, assuming "cruising" means planing at 25 knots, not chugging at 7 knots. Surely 50 gph is more like it (for both engines, not each). You did say they were petrols, right?

 

[burgundyben]

Thats gonna cost more to run per hour than my mooring for a month...............

burgundyben, coolest of men, by all I'm called, cool burgundyben.

 

[Col]

He reckons 60gph full bore, I'm sure he's looked up the specs for a Tomahawk, not a Thunderhawk, I would think 30 gph is too low.

 

[jfm]

Nuthin to worry about

What the hell, he only lives once!

Anyway, it's not a mode of transport. You can have a whole day's boating with praps only 1 hr engine running time

 

[Col]

Re: Nuthin to worry about

What with the rest of us egging him on??
He does bait easily!!

 

[hlb]

Re: Nuthin to worry about

Yes but it's a bloody expencive hour. QAB Plymouth charge £5 per gallon. Thats £300 an hour at my/your reconning. Even if we're a bit wrong it's a bloody expencive summer coast hopping trip. At my low average of 100 hours per year, thats thirty grand a year. Ohh well never mind it's good fun!!

Haydn