Reply
 
Thread Tools Search this Thread
 
Old 09 March 2006, 15:31   #1
Member
 
Country: UK - England
Town: cornwall
Boat name: nothing
Make: rib eye 430
Length: 4m +
Engine: tatsu 50
MMSI: 666
Join Date: Mar 2006
Posts: 1,916
Sib fuel tank position

My honda 3.8 has a strap in the centre under the thwart for the fuel tank .
Iam not that happy with this position as the fuel line is easily knocked off and the pipe trailing back to the engine is a pain .
I think I also made a mistake by swapping the standard 12.5 l tank for a 25 l.
No problem I shall just but a new 12.5 tank and keep the big one for any longer trips .

Where are the fuel tanks best positioned in other similar sized boats ?

Because the driver sits on the right and the passenger the other side and furthat forward I was thinking of positioning the fuel tank against the transom in the left corner , and shortening the fuel line. Is iether a good idea , i can see no reason for the any set length of fuel line will a really short one cause any problems ?

Also while iam on does the centre thwart have to be fitted , does it serve as as any sort of support for the tubes . It would be easier to use the boat most of the time without it .
__________________

__________________
ian parkes is offline   Reply With Quote
Old 09 March 2006, 15:39   #2
Member
 
Country: UK - Wales
Town: swansea
Boat name: Too Blue
Make: BLANK
Length: 8m +
Engine: Suzuki DT225
Join Date: Mar 2004
Posts: 12,791
Just chuck my fuel tank into the furthest corner against the transom.

As to the thwart in theory it will make the boat more rigid but I have used it with and without - no difference!!!
__________________

__________________
codprawn is offline   Reply With Quote
Old 09 March 2006, 15:46   #3
Member
 
Country: UK - England
Town: London
Boat name: varies
Make: n/a
Length: n/a
Engine: varies
Join Date: May 2004
Posts: 128
Hi ian,

I've not got very much experience in small inflatables (so take this or leave it), but is it worth trying to get the fuel/weight as far forward as possible? The small SIBs that I've been in seem to have alot of weight at the back and the bow tends to feel very light. One up, into small waves with head to wind, I'd want some weight forward. But, that is my personal opinion and comes from only about a dozen trips, so I will readily bow to the many on RIBNET with more direct knowledge.

have fun,

t
__________________
Tideway is offline   Reply With Quote
Old 09 March 2006, 15:51   #4
Member
 
Country: UK - England
Town: Chelmsford/Anglesey
Make: Avon SR/RibLite 3.1m
Length: 4m +
Engine: Honda 30hp/Yam 8hp
Join Date: Jul 2003
Posts: 970
I do the same as Codders with my RibLite, which although not strictly a SIB, is about the same weight and rigidity. Fuel tank sits against the transom no problem, although I haven't bothered to shorten the fuel line, just coil it up and secure to top of tank with electrical tie. I suspect shortening it would be a better idea, though. I don't bother with the seat either, it just gets in the way and doesn't seem to add too much to the rigidity of the boat.

Tideway's point about the bow rising is valid, but the trim pin on my 8hp is set at the lowest setting and is very effective at keeping the bow down. Mind you, I weigh 11.5 stone, might be a different matter with a fat b*stard on board
__________________
Phil Davies is offline   Reply With Quote
Old 09 March 2006, 17:24   #5
Member
 
Country: UK - England
Town: cornwall
Boat name: nothing
Make: rib eye 430
Length: 4m +
Engine: tatsu 50
MMSI: 666
Join Date: Mar 2006
Posts: 1,916
Thanks for replies

Interesting about opinion on wieght in the bow .

With 2 adults aboard if one sits right in the bow it seems to plow and gives a wet ride . moving the person from the bow back nearer the middle the boat performs much better and gets on the plane easier and stays there with a lot less throttle . I haven't been in it alone yet so keeping the option of moving the tank forward with a long fuel line is probably a good idea .

Does anyone ever use a tiller extension ?

The honda does seem to have a high bow with a much deeper V than the other sibs I looked at so wether that makes the wieght distribution different I am not sure .

I have just got some inflatable launching rollers and the intention is to double their use and strap one or two in the middle in line with the keel using the strap for the fuel tank . maybe comfy to sit astride and wieght can also be transferred easily by sliding forward .
__________________
ian parkes is offline   Reply With Quote
Old 09 March 2006, 18:38   #6
Member
 
columbiachop's Avatar
 
Country: USA
Town: Pacific NW
Make: zodiac pro 420
Length: 4m +
Engine: Tiller 25 yamaha
Join Date: Oct 2005
Posts: 205
my sib is a little larger but i strap a plastic 9 gallon tank back by the transom to avoid that fuel line tangle. i use a 9 gallon zodiac rubber bag style tank strapped up in the bow to even out the weight. it's basically a reserve tank with a quick connect if i need it. it seems balanced to me.


andy
__________________
columbiachop is offline   Reply With Quote
Old 10 March 2006, 14:01   #7
Member
 
Country: UK - England
Town: London
Boat name: varies
Make: n/a
Length: n/a
Engine: varies
Join Date: May 2004
Posts: 128
I should qualify that my post is only based on being on my todd in the boat, hence the light bow/weight forward comment.

Unfortunately, I am a fat b*rst*rd,so that doesn't help...
__________________
Tideway is offline   Reply With Quote
Old 10 March 2006, 16:10   #8
Member
 
Country: UK - England
Town: cornwall
Boat name: nothing
Make: rib eye 430
Length: 4m +
Engine: tatsu 50
MMSI: 666
Join Date: Mar 2006
Posts: 1,916
lets start the fat bastards in sibs forum right here ? Iam told I qualify
__________________
ian parkes is offline   Reply With Quote
Old 10 March 2006, 16:50   #9
Member
 
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
Ian;

I ran an Achilles 14'/Honda BF-40 for a couple of years. My setup was pretty similar to yours: sit on the emerg eqpt box, fuel tank on the port side against the transom. Worked very well.

I did notice the ride improved with more weight up front, especially when traveling alone. Of course, in my case, the weight shift was dive gear, not fuel tank.

Luck;

jky
__________________
jyasaki is offline   Reply With Quote
Old 10 March 2006, 18:24   #10
Member
 
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,298
I have used a triangular shaped tank in the bow, but with no facility to tie it down, I found it was flying all over the place and it also got in the way on a small (10') SIB, so I went back to a 3 gallon tank under the aft thwart. That set-up works well.
Anyone want to buy a cheap triangular tank????
__________________

__________________
Downhilldai is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 18:09.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.