PowderyHippo
New Member
Hi all, I've got twin 1991 7.4l Mercruisers set up in my 1991 Tiara 3600 Open Express and I was just wondering if anyone has the fuel consumption or performance reports for this year.
Thanks
Thanks
1991 7.4l Mercruiser Fuel Consumption
- Thread starter PowderyHippo
- Start date
epervier
Well-Known Member
I, lots! ranging from frightening thro' to horrific!
II, quite quick, but not stunning.
18kts cruise, according to this brokerage, www.yachtcouncil.com/boats-for-sale/type/category/TIARA/3600+Open/select-country/city/Tiara 3600 Open Express Caswell boat.1988
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rbcoomer
Well-Known Member
An estimate: http://www.boat-fuel-economy.com/mercury-mercruiser-454-7.4-fuel-consumption-liters (don't forget to click the 'twin engine'...)
Arguably, if you have to ask then probably too much!
Arguably, if you have to ask then probably too much!
landlockedpirate
Well-Known Member
I'm a big supporter of petrol boats, but that one scares even me 
Don't know the exact numbers but would estimate from 10-30gph for each engine, around 20gph each at cruising.
Don't know the exact numbers but would estimate from 10-30gph for each engine, around 20gph each at cruising.
Elessar
Well-Known Member
Guess 5 litres per mile if you don't cane it. 10 if you do.
Drewster
Well-Known Member
That be a fantastic appAn estimate: http://www.boat-fuel-economy.com/mercury-mercruiser-454-7.4-fuel-consumption-liters (don't forget to click the 'twin engine'...)
Arguably, if you have to ask then probably too much!
rbcoomer
Well-Known Member
Yes indeed. Can't recall where I first saw it - possibly on here, but everyone I know who's tried it reckons it's proved pretty accurate. I guess a lot will depend on vessel and load, but that will likely affect the speed more than fuel burn. There are other tools out there for calculating speed based on hull, hp, prop, rpm etc but estimating likely fuel use is quite a useful starting point for those of us on a shoestring! Not sure I'd want to run a pair of 7.4's at any speed myself and one would be more than enough...
moonraker 36
Well-Known Member
once took a boat called wheeler dealer from stainlands marina thorne to hull marina after a refit.
it ran a pair of 7.4big blocks.....it used 200quids worth of fuel..thats when petrol was 70-80p a litre.
distance was 9mile by canal,and about 28-30 mile from keadby to hull.
it used the lot!
it ran a pair of 7.4big blocks.....it used 200quids worth of fuel..thats when petrol was 70-80p a litre.
distance was 9mile by canal,and about 28-30 mile from keadby to hull.
it used the lot!
mart-NL
New Member
An estimate: http://www.boat-fuel-economy.com/mercury-mercruiser-454-7.4-fuel-consumption-liters (don't forget to click the 'twin engine'...)
Arguably, if you have to ask then probably too much!
Hi, thank you for introducing my (hobby) website Boat-Fuel-Economy !!!
Please can you help me, im from the Netherlands, here we use kilometers and liters, in the US they use gallons and miles.... but what is common in the UK England??
The link in your post is in Liters, on my website I have also made a part with UK (Imperial/canadian) Gallons, this part has not much viewers
Greetings from the netherlands, mart