Deposit in Dommi fuel tank

Just put it on the bike and run it. For a year or so you will just have to keep on top of cleaning out the fuel filter that is built into the monobloc carburetors. After a fashion it will clean itself out with use. Been there, done that.

I haven't tried this on a petrol tank, but sodium hydroxide was always used to shift burnt-on carbon deposits from 2 stroke silencers so might just work on the horrible brown gunk. If you can't get plain sodium hydroxide, oven cleaner is pretty much the same. Don't get it on the paintwork!

Make sure any petrol filter you fit can cope with ethanol in the petrol. Some quietly dissolve, dripping petrol onto ignition systems and hot exhausts...

You could try giving it a prolonged squirt from an aerosol of carb cleaner, a good old swill round then flushing out with fresh petrol.

It might be worth putting a cheap filter, in line, between the fuel tap and carb. Any yacht chandlers will have one, they are normally used in the fuel lines from the remote tanks of outboard motors. John.

Cheaper than oven cleaner (of which it is the main ingredient), you should be able to buy caustic soda, without raising too many eyebrows!

I have a friend who has a lawncare buisness, and they use EITHER muriatic acid, OR fuel line cleaner (fuel injector cleaner). The muriatic acid is normally available at any hardware or homecenter in the paint department. With either chemical, you would want to remove all chemical residue & flush with new fuel before using.

Adding an additional fuel filter between the carb & the tank is always helpfull, but I dont care for the look of the plastic ones, some of the better autoparts stores sell metal ones & I have seen the Amal ones on ebay occasionally but always wondered what size hole it had in each end, it looks really small?????

Skip Brolund

I found this neat link on cleaning gas tanks on mopeds:

http://www.mopedarmy.com/wiki/Removing_rust_from_a_gas_tank

Be safe when using any chemicals & follow all manufacturers safety instructions !!

Skip Brolund

I did notice that Hydrochloric (Muriatic) Acid is the main ingredient of toilet scale remover... Probably fine for bog-standard tanks.

Gordon.

Look at the Caswell Europe website. This is a highly recommended two-pack epoxy petrol tank coating I'm about to use on my Dommi steel tank, and they tell you how to get it immaculate with Acetone, available in any shop selling GRP stuff, such as a yacht chandler.

My next door neighbour is a cleaning lady and she always uses cheapo supermarket cola to clean her own drains! Just pour it in and leave it overnight and let the phosphoric acid do its job. Non-toxic! Brick or tile cleaner will also work but wear gloves and safety specs when using it - and don't drink it!

Cheers,

Lionel

Clive Neale reviously wrote:

Thanks for the replies, tried to get some sodium hydroxide as that stirred the grey matter from my two stroke days. Think I nearly got arrested, something about why would I want such a dangerous chemical, I must be a foreign lunatic!!!!!!!!!!!!!! b........nancy state. Oven cleaner sounds a good alternative, failing that the carb cleaner is a possibility, if I can get a decent sized can over here. DIY of any sort is really frowned upon here and nearly always an inquest as to why do you want to do it yourself, we can do it for you at a price. I have an inline filter on the modern but that went a bit sticky with the modern fuel so may have to bite the bullet and go to a modern (sorry for the bad language) dealer to see what they have.

Where were you trying to buy it? There are plenty of sellers on Ebay and elsewhere. Small quantities can be bought from chemists.