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Old 14 October 2005, 03:31   #11
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Quote:
Originally Posted by hard1
Eh? You're saying that my Opti only uses 25 litres an hour at WOT? Let me see, that's 8 mpg!

I'm deffo not selling it now....
You sure???? Mine is happy to gently sip away at 22 Gallons per hour WOT... same engine! You sure your litres are not smartcraft gallons?
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Old 14 October 2005, 15:53   #12
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Sorry, A bit missleading on the OPTi and Four stroke figures

Example

A 200Hp carb will use Approximatly 66 litres an hour at wide open throttle.

So a 200hp OPTI will use a third off that figure again. Third of 66 is 22 litres.

Take 22 from 66 gives you 44 litres an hour.


This is only used as a guide so no one start saying how wrong it is . Always depends on the boat and load in the boat etc etc.

God just read all that, sounds like a maths lesson!!!!
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Old 14 October 2005, 17:14   #13
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Quote:
Originally Posted by Turbodiesel
Sorry, A bit missleading on the OPTi and Four stroke figures

Example

A 200Hp carb will use Approximatly 66 litres an hour at wide open throttle.

So a 200hp OPTI will use a third off that figure again. Third of 66 is 22 litres.

Take 22 from 66 gives you 44 litres an hour.


This is only used as a guide so no one start saying how wrong it is . Always depends on the boat and load in the boat etc etc.

God just read all that, sounds like a maths lesson!!!!
if a boat has a 200 opti fitted, will the fuel used depend on the boat it is fitted to even if the throttle is wide open?

most people report the fuel smart craft as showing around 19-20 gals per hour at max throttle position which i make to be 19x4.54 = 85+ litres per hour

do you think your estimates are more accurate?

do you know if the smartcraft gauges read in us or imp gallons?

cheers
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Old 15 October 2005, 16:34   #14
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Quote:
Originally Posted by Hugh Jardon
if a boat has a 200 opti fitted, will the fuel used depend on the boat it is fitted to even if the throttle is wide open?

most people report the fuel smart craft as showing around 19-20 gals per hour at max throttle position which i make to be 19x4.54 = 85+ litres per hour

do you think your estimates are more accurate?

do you know if the smartcraft gauges read in us or imp gallons?

cheers
A 200 Opti will burn the same amount of fuel at WOT regardless of the boat it's attached to. What will alter greatly is the speed that it'll be travelling at.
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Old 16 October 2005, 04:55   #15
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Quote:
Originally Posted by Hugh Jardon
do you know if the smartcraft gauges read in us or imp gallons?
Can the SmartCraft guages read out in whatever units one requires? (ie Imp Gals, litres)
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Old 16 October 2005, 05:24   #16
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Quote:
Originally Posted by Andy Moore
Can the SmartCraft guages read out in whatever units one requires? (ie Imp Gals, litres)
As no one seems to know if the gals displayed on smartcraft are imperial or us gallons, or at least noone has responded to that question when i have asked it with an authoritive yes or no.

i have done some research and the options are as follows

metric litres
or gallons english (us)

so

when your gauges are reading 19.5 gals at WOT you are actuall using 16.2 uk gallons

1 us smartcraft gallon is 0.833 uk gallon

i have downloaded the complete manual set from mercury on the smart craft operations manual for both smartcraft gauge combinations

http://www.mercurymarine.com/uploads/images/914/10229023.pdf

the smartcraft gauges can do a heck of a lot so i suggest downloading the manual and have a play as lots of useful features.

hope you opti users find this useful

chris
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Old 16 October 2005, 05:25   #17
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Its far easier to use the yank method-fuel consumption=10% of HP in GPH...and anything better than that's a bonus.
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Old 16 October 2005, 06:23   #18
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Quote:
Originally Posted by Hugh Jardon
metric litres
or gallons english (us)
So you can set them to read out in litres per hour? If so, that's problem solved isn't it?
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Old 16 October 2005, 07:10   #19
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Quote:
Originally Posted by Nos4r2
Its far easier to use the yank method-fuel consumption=10% of HP in GPH...and anything better than that's a bonus.

I'd go with that one. Sounds a lot nearer the mark.
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