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Old 03 June 2008, 11:52   #1
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Hydrofoils

Hi, Please could you help.....

I brought a 4m Ocean rib with a 1990 or im not quite sure maybe 1998 mariner 40hp engine and i had seen all the threads on hear so i brought and fitted doel hydrofoil fins to the outboard.

I have used the boat and i get on the plane quick and theres a stable ride and everything....etc. The only thing is that fuel usage is appaling i use so much fuel!!!!!!

Can i take the hydrofoils off my engine and see if the hydrofoils are making it bad fuel usage or will the holes in the cavitation plate be bad?????

Is there anything i can do to change or improve fuel usage??

Thanks for your help...

Alex
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Old 03 June 2008, 12:29   #2
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Originally Posted by ali_seton View Post
Hi, Please could you help.....

I brought a 4m Ocean rib with a 1990 or im not quite sure maybe 1998 mariner 40hp engine and i had seen all the threads on hear so i brought and fitted doel hydrofoil fins to the outboard.

I have used the boat and i get on the plane quick and theres a stable ride and everything....etc. The only thing is that fuel usage is appaling i use so much fuel!!!!!!

Can i take the hydrofoils off my engine and see if the hydrofoils are making it bad fuel usage or will the holes in the cavitation plate be bad?????

Is there anything i can do to change or improve fuel usage??

Thanks for your help...

Alex
What do you call appalling fuel usage?
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Old 03 June 2008, 12:36   #3
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I found hydrofoils in favor of fuel usage. You can plane and go steady at lower rpm with them which helps fuel consumption
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Old 03 June 2008, 12:39   #4
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if you have fins fitted then make sure you have the trim correct for the speed you are doing otherwise they can cause some drag and reduce mgp
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Old 03 June 2008, 14:50   #5
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Yes, you can remove them and run; the holes will have little, if any, effect on operation.

jky
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