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Polarkiwis
Joined: 22 Feb 2006 Posts: 24
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Posted: Thu Jul 20, 2006 4:34 am Post subject: Mercury 175hp SJ fuel flow? (Urgent reply please) |
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Looking at doing a race this weekend in NZ. I'm trying to figure out my endurance at race RPM's
What is the fuel flow at max rpm?
Anyone got some figures at various RPM's as well as full throttle?
My fuel flow meter says about 45 litres an hour at full throttle. Is this about right?
Cheers
Brian |
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mike.elmes
Joined: 07 Jul 2005 Posts: 24
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Posted: Fri Jul 21, 2006 7:24 pm Post subject: |
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My 240 SJ says its's burning 20 us gal/hr@WOT which would be 80litres/hr |
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Polarkiwis
Joined: 22 Feb 2006 Posts: 24
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Posted: Mon Jul 24, 2006 5:27 am Post subject: |
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Done the race. Burnt about 55-60 litres an hour. Sat at 5200rpm (WOT) for three hours. Would bank on 60 L/.hr or 1 litre a minute
Lots of fun. Raced in R2 class in my Terrierjet.
Here's some pics from the weekend.
http://www.nzjetboating.com/yabbse/index.php?topic=7638.15
Cheers
Brian |
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Xerophobic
Joined: 23 Jun 2005 Posts: 970 Location: Calgary Alberta, Canada
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Posted: Mon Jul 24, 2006 5:47 am Post subject: |
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Sounds good Brian
Im not sure what happened there I replied to this with info while I was at Outlaw/Eagle, I had asked Dale for the numbers. The post didn't go thru or got deleted or something??? Anyway Im back in Toronto now and have forgotten what he told me lol
Sounds like you had fun anyway
Cheers _________________ T-53 , why go up and down when you wanna go round and round???? |
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Polarkiwis
Joined: 22 Feb 2006 Posts: 24
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Posted: Mon Jul 24, 2006 5:57 am Post subject: |
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Luckily I had fitted a tote tank as the Rakaia River was about 90km upstream. My underfloor tank is only 60L. We ran it dry about 5-10 minutes from the finish. We just selected the 24L tote tank that I had fitted inline with a Parker T junction and an ballcock, primed the carbs with the fuel bulb a started her up. It was a good opurtunity to turn the engine off and let the stones fall out of the grill anyway:D
Would still like to hear what they reckon a SJ175 urns an hour?
Cheers
Brian |
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Xerophobic
Joined: 23 Jun 2005 Posts: 970 Location: Calgary Alberta, Canada
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Posted: Mon Jul 24, 2006 6:26 am Post subject: |
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I "think" he said 12-14 gph at WOT and cruise about 7 gph (around 4000-4200) I think thats what he told me for the 175 but im jet lagging and dead tired as I only aerrived in town late last nite hehe
Cheers _________________ T-53 , why go up and down when you wanna go round and round???? |
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bender
Joined: 03 May 2006 Posts: 50
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Posted: Mon Jul 24, 2006 8:59 am Post subject: |
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I am pretty sure on the harbercraft forum I seen a really extensive post on that awhile back maybe if you go there and either do a search or ask someone might be able to help you out ,I think it might have had a graph or something to |
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Firefish
Joined: 19 Jul 2006 Posts: 27
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Posted: Wed Jul 26, 2006 10:31 pm Post subject: |
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Does anyone know what a 240 will drink at mid range throttle? Say 4200-4800. Cerious to know if they are comparable to the 175.
Thanks. |
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Alumaman
Joined: 26 Jul 2005 Posts: 306 Location: Whitecourt
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Posted: Wed Jul 26, 2006 11:59 pm Post subject: |
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I have a smart craft gauge, for my 240 the best economy is around 3800 rpm drinks about 30 litres/hour.
lowest I can go and stay on step is 3600 rpm at 26 l.p.h.
at 4500 it 45 lph
5000 its 60 lph
and at wot 5700 its 90 lph
there are also some good speed/fuel/rpm charts that Matt has on his site |
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