We have a Yamaha F225, as I am sure you are aware the economy will depend on the hull and sea conditions. But to give you an idea cruising at around 25knots our fuel flow meter reads around 30-35 litres per hour. At WOT on a very flat day the worst I have seen is approx 75 - 80 lph. On this trip we were two up with a reason amount of kit on board and 200+ l of fuel.
We had a 7.5 Cobra with a 260 lt tank last year we did the Biboa Weymouth trip
From Langston marina to Yarmouth then on to Weymouth all as fast as we could go then return trip plus went to yarmouth and back the following week approx 190 n/miles one tank.
I have spent a fair amount of time on Whiteshooes Boat which has one of them engines and I think he consumes about 70 LPH! Coinceidently the engine gets through about the same amount of petrol
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Here it comes again, I don't stand a chance
Soul possession, Got me in a trance
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