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Old 01 October 2007, 06:58   #1
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Fuel Stabilizer?

Hi guys, quick question are these fuel stabilizer tabs suitable for my yamaha 40hp 2 stroke?

They include injector cleaner, would that be a problem?

Thankyou

http://cgi.ebay.co.uk/DYNOTAB-FUEL-S...QQcmdZViewItem
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Old 01 October 2007, 12:45   #2
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They sound a bit like a marketing fad.

It's only a fiver for a bottle of proper fuel stabiliser from a chandlers or a lawnmower dealer.
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Old 01 October 2007, 16:32   #3
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FuelSet

I have been using FuelSet for years in Deisel engines in yachts.
Does anyone use it regularly in their brand new 140hp 4 stroke O/B's?
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Old 01 October 2007, 18:47   #4
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that stuff fooked my optimax *edit* sorry it was quicksilvers own even worse
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Old 02 October 2007, 06:47   #5
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Quicksilver/FuelSet

Ooh ~Err!

How come? What kind of fooking?
Did you use it from new?
What did Quicksilver say when you told them their product fooked your engine?
What did engine manufacturer have to say?

Questions questions questions!
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Old 02 October 2007, 09:26   #6
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Quote:
Originally Posted by BassBoy View Post
Ooh ~Err!

How come? What kind of fooking?
Did you use it from new?
What did Quicksilver say when you told them their product fooked your engine?
What did engine manufacturer have to say?

Questions questions questions!
It was a one and only time, I gave my dealer the boat to winterise it, and next season I had injector trouble the first time out. The engine shut down to guardian mode. Fortunately they were repaired under warranty since it was only a year old, but I was deeply suspicious that the additive was the cause, perhaps the quantity was wrong ? or maybe optis are not supposed to get this stuff used on them I don't know.
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Old 02 October 2007, 11:42   #7
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3 pounds 50 for 2 tablets? (sorry; don't have the pound symbol on my machine)

I bought fuel stabilizer for the chainsaw at about $4US for a bottle that would treat my 50 gallon boat fuel tank about 4 times.

That said, my boat occasionally gets a treatment of stabilizer/EFI cleaner, but it works out to much less than those tablets (though they *do* come "All the way from the US".)

Stop in at your local auto shop; they'll have the same stuff at a much more reasonable price.

What you want is something that will break down varnish (chemical FI cleaners won't do anything for stuff like grit anyway), and keep the fuel from going stale. If you run the boat pretty often, it may be somewhat pointless to stabilize the fuel, though the cleaner part would still be good.

jky
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Old 04 October 2007, 15:01   #8
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If you plan to 'winterise' your boat, then fuel stabilizer is essential. Today's petrol/gasoline is far more 'cat-cracked' than it used to be (trying to extract every drop from the crude oil), and therefore tends to be more unstable than it was in the 'old days'.

There is a test for oxydation stability of petrol that every drop of EU petrol must pass, but often it is right on the limit, and it is tested ex-refinery, or ex-cargo. By the time it gets to your boat, it may well be several months later, and oxydation has already started.

I learnt the hard way, and I have had problems in the past with my chainsaws and with my boat.

It is better to do this than to drain the fuel completely, as stabilized fuel is better than humid air (IMHO).

(I used to be an oil trader for Total).
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