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Old 14 August 2011, 02:00   #11
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1L per mile sounds exceptional for a boat that size though? Very impressive all the same - it would cost less to run than my Vipermax - sadly a bit out of my price range

BTW in the UK 1 gallon = 4.546 litres, 3.7L is the US gallon
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Old 14 August 2011, 04:28   #12
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Petrol powered boats aren't even comparable.
I can been your fuel ecconomy but not your speed

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Question for Alan. Have you ever owned or used an inboard powered RIB, like a top of the class RIB like a Goldfish?
Have you bothered to look at who "Alan Priddy" is? He's made it particulalrly easy for you by using his real name...
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Old 14 August 2011, 04:35   #13
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Another one for the inboard diesel side - our twin Yanmar BY260's which are based on the 3 litre BMW block use a maximum of 104 litres per hour at wide open throttle - top speed 65 - 70 mph depending on props, and it's a 3000kg 11 metre overall boat!
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When a boat looks that good who needs tubes!!!
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Old 14 August 2011, 04:44   #14
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Another one for the inboard diesel side - our twin Yanmar BY260's which are based on the 3 litre BMW block use a maximum of 104 litres per hour at wide open throttle - top speed 65 - 70 mph depending on props, and it's a 3000kg 11 metre overall boat!
Is that each or both engines combined?

Either way you've apparently fitted the wrong engines the DMax can do that speed on 1/2 the fuel...
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Old 14 August 2011, 04:58   #15
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Is that each or both engines combined?

Either way you've apparently fitted the wrong engines the DMax can do that speed on 1/2 the fuel...
That for both engines combined.

Smaller boat with a higher horsepower single = different equations. Goldfishes did well in the RB08 but trashed a few drives which I believe has been resolved now.
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Old 14 August 2011, 06:30   #16
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Depends on what the boat is used for but a commercially run petrol boat is cost efficient compared to the cost of a diesel boat. Once you reclaim the tax and duty it works out about 61 pence per litre and going down in price.
For reference, my new boat uses 30000 litres of fuel per 6000 miles which is each fill up. To save working it out that is about 180 litres per hour with an average speed over the distance of 27.4 knots or just over 30 mph if you want to show bigger numbers www.circumnavigationrecord.com . Answer to quaoar. I have no interest in trying or owning a Goldfish but thanks enquiring anyway. BTW. Have you tried the new Redbay 10.5? It's not called the Beast for nothing. Designed as a fast rough weather boat it lives up to it's name Alan P
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Old 14 August 2011, 06:44   #17
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Have you tried the new Redbay 10.5? It's not called the Beast for nothing. Designed as a fast rough weather boat it lives up to it's name Alan P
I have! It isn't! It does!

Nice boat - apparently it's For Sale
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Old 14 August 2011, 13:24   #18
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Have you bothered to look at who "Alan Priddy" is? He's made it particulalrly easy for you by using his real name...
Why bother if his comparison on fuel consumption is sky high compared to what I'm experiencing. It was he who asked for some numbers, which for me implies that he actually believed there to be some similiarities with the numbers he presented. *shrug*
My point was that there is a usage for inboard diesel engines, because they are cheap compared to petrol outboards when it comes to paying for fuel.

Also, I do my own engine maintenance. The Yanmar Dmax has no electrical parts and is easily servicable. Dmax is based on Yanmar 6LP diesel engine. You can find engines with 10.000+ hours run time. If your goal for boating is long (seriously long) trips, with low fuel consumption and dead solid engine, then this is something you should look into.
There are downsides, but here we were talking about fuel consumption and then someone brought in arguments about service costs. If someone wants the cons., just ask and I'll give you a list

Just to make it clear, this is my private boat and it's not used for any type of commercial use.
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Old 14 August 2011, 14:27   #19
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I think Alan may also have done one or two long-ish trips over the years. You really should Google it
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Old 14 August 2011, 15:54   #20
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But he's used diesel RIBs and not outboards for all his major jaunts.

Al, are you confusing the 50 gallons an hour that the Beast drinks with 50 litres an hour for a diesel RIB? Just asking
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