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Old 22 November 2011, 13:37   #11
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You've got 2 tanks already, I'd keep them. Apart from carrying out vapour safety procedures prior to welding, it's probably a 5 minute job.

One leak out of 2 tanks after however many years of slamming doesn't make them unfit for purpose
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Old 22 November 2011, 14:37   #12
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I m gonna replace the smaller reserve tank with a plastic one...There is a load of space where it sits that is going to waste so its only sensible that i utilize it for max benefit.

As long as there are no major problems with using a plastic tank
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Old 22 November 2011, 18:02   #13
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I had a plastic 110 litre tank in my BWM without a problem, have never had stainless or alloy so can't comment. My current 200 litre tank is made from fibreglass.
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Old 23 November 2011, 03:09   #14
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This is also a solution
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Old 23 November 2011, 03:22   #15
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Quote:
Originally Posted by Miller
I m gonna replace the smaller reserve tank with a plastic one...There is a load of space where it sits that is going to waste so its only sensible that i utilize it for max benefit.

As long as there are no major problems with using a plastic tank
This is one of those problems that can pose multiple answers that are right and wrong and flawed. Almosy every angle has been covered in the replies: mend what you have, use ali, use plastic...

Personally, seems to you have two tanks that, presumably, have given good service until now. One of them now has an easily repaired fault if done professionally.

All other options potentially involve pandoras box ( sorry Pandora, no offense) and additional expense by modifying the engineering of the installation.

Make sure you don't throw the baby out with the bathwater
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Old 23 November 2011, 04:13   #16
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I have two stainless tanks one of which was weeping a bit, cost 30 to get it sorted.
I looked at plastic tanks etc and decided to keep what I have.
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Old 23 November 2011, 04:34   #17
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The issue that complicates the matter is that the tanks will be buried below the deck, which needs to be cut out to gain access?

The OP wants to sort the job once and once only. Repairing the leaking tank is easy - the leak can be seen and dealt with. My worry would be the tank that's not (yet?) leaking. Leave alone and fingers crossed, or dig it out and renew it now.

When i've been asked to look at boats with leaking tanks they've generally been stainless steel and of poor quality.

Plastic can be a good solution - but only in standard sizes - I don't think that Tek Tanks will build a custom tank for petrol.

Aluminium also good in the right application - but under a deck can be prone to corrosion if the bottom sits in a bit of water.

What do I have? - GRP tank in the Scorpion and hoping that the higher ethanol petrol that will inevitably come into use won't attack it from the inside.
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Old 23 November 2011, 05:17   #18
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Quote:
Originally Posted by Searider
What do I have? - GRP tank in the Scorpion and hoping that the higher ethanol petrol that will inevitably come into use won't attack it from the inside.
Car manufacturers have been going through hell trying to find materials that are longer term ethanol resistant but that's mostly with respect to markets with an aggressive ethanol introduction time-line at percentages significantly higher than those envisaged for medium-term Europe.

As ever with any fuel system, keep a watchful eye, and, perhaps more importantly, a watchful nose :-)
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Old 23 November 2011, 06:53   #19
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Deck has already been cut up to get to them...They were originally repaired when the boat was rebuilt in 2008; dont think the welder did a very good job!

My main tank is 150L, it has a very small crack in the seam so i ll get that one repaired easily enough.

The reserve has a fair size leak somewhere and this is the 2nd time its been repaired. its 50L and about 450mm long.. It sits in a void that is almost 1200mm long and packed in with this expanding 2 part foam.

I could quit easily buy one of the tek tanks off the shelf that would fit into the void length ways and just pack the sides and bottom...This would also give me more than 50L

If there are no major drawbacks thats the route im going to take...Stainless main tank and plastic reserve.

That sound ok?
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Old 24 November 2011, 10:53   #20
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Custom tank fabricators

Quote:
Originally Posted by Dirk Diggler View Post
Go to a company such as "the tank company" in Poole, and you won't get a problem. I've been using them for 15 years, and never had a failure. Not cheap, but quality never is. If you work on the formula of 2.5 x the cost of the fuel (petrol) the tank holds, you won't be far out! Assuming it's a pretty uniform shape of course
The Tank Company went out of business last year!

However these people make the fuel tanks for Sunseeker

Oval Stainless Ltd
H3, The Fulcrum
Vantage Way
Mannings Heath
Poole
Dorset
BH12 4NU

Phone: 01202 749907
Fax: 01202 748471
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