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Old 30 July 2004, 06:29   #1
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200HP Fuel consumption

I've had to move onto a 25l auxiliary tank due to an untraceable leak in my main tank that needs to be sorted over-winter. Going from having over 100l to what is basically always in the red on my fuel guage means I’ve been very nervous about fuel consumption and did some experiments to see what my range is.

I have a Yam 200hp and at full whack (40+kts) I reckon on getting through a litre a minute! This means my current “cruising” range is about 25-30 miles.

Does this sound right for that size of engine on a 7.5m RIB?
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Old 30 July 2004, 06:46   #2
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Stop you're making me sick ! Think I'll start another thread about larger engine fuel consumption.

what you need is a nice two stroke 40hp mariner

with a 4.5m rib you should get at least 65 miles per 25l tank


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Old 30 July 2004, 06:55   #3
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Doh!
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Old 30 July 2004, 07:05   #4
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We have a 200HP Yam HPDI. We get through 1 litre a mile cruising at 3500rmp approx. Flat out we use 70litres an hour if not more.

This is a HPDI, what engine type is yours? Whats the engines age?
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Old 30 July 2004, 07:41   #5
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Its a 2 year old V6, don't know the exact model.

That sounds about the same then, I may be using more than a litre a minute, so 70l per hour-ish.

At 1l per min at 5000rpm equates to 0.2cc per revolution, or 0.033cc per bang!!!

Think I'll stop that line of thought .
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Old 30 July 2004, 08:06   #6
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Not sure if it helps but....

I switched to a Merc. Optimax 200 this year and have been very impressed with the consumption. At around 3500 its using about 25 l/hour
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Old 30 July 2004, 14:01   #7
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Yamaha 200HPDI flat out = 19gph (or so it said on the yam fuel comp last year)
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Old 31 July 2004, 10:44   #8
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Squirrel, you just need to back off the throttle

Any V6 motor, whether it's hpdi, Optimax or whatever, will get through 60+ litres per hour at full chat. I think four strokes will suffer similarly.

Back off to about 35 kts and your fuel consumption should reduce dramatically.
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Old 01 August 2004, 03:55   #9
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But I like going fast

Thanks for confirming my suspicions everyone, I don't charge about everywhere, but it is nice to be able to floor it occasionally. I'll just have to ease off until until the main tank's fixed. At least fuel's cheap over here .
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Old 01 August 2004, 04:12   #10
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You´re lucky then Squirrel, price of petrol over here at the moment about 76 pence a liter, what is it over there ?

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