ITS smoke on the water, you must have had a hair cut or gone baldQuote:
Originally Posted by Mr Whippy
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ITS smoke on the water, you must have had a hair cut or gone baldQuote:
Originally Posted by Mr Whippy
Great song, Deep Purple from the album Machine Head.Quote:
Originally Posted by clean32
But we are talking about smoke in the water.
Dave.
ohhh OK BONGQuote:
Originally Posted by Mr Whippy
Quote:
Originally Posted by Mr Whippy
The Blue smoke is UNBURNT OIL!!!!!!!!!!!!!!!!!!;)
Have you never seen the end of a 2 stroke bike exhaust, lots of oil in there.
Smoke is the result of burning. If something is not burnt it won't smoke.
This is why we get the smoke, because the oil is burnt. The exhaust on my out board does not have oil residue in it and neither does my chainsaw.
My outboard is old and I'm sure modern ones put out a lot less smoke than mine and with modern technology could easily solve any pollution problems.
I am sure outboards will still be around long after I have departed this planet.
Dave.
you think so????????????
Two and Four Stroke Outboard Engines
http://www.kimointernational.org/Por...s/RESL102D.pdf
That took ten seconds to find............. 2 strokes pollute the water......... Don't get me wrong there is nothing better than a 2 smoke at full noise but.
So what this is saying is that smoke is unburnt oil. So if the oil is burnt there will be no smoke.
Does this then mean at the camp fire if I burn all the wood I will have a smoke free fire.
Dave.
Smoke = " A suspension of fine solid or liquid particles in a gaseous medium ".Quote:
Originally Posted by Mr Whippy
could be due to burnt or unburnt oil. i suggest you clean a 2 stroke motor in a drum of water one day and then take a look at the scum on the surface of the water after it settles to get an idea of the amount of scum they pump into the water. The big problem with most 2 strokes is each time a new charge of air/fuel is loaded into the combustion chamber, part of it leaks out through the exhaust port. That's why you see a sheen of oil around any two-stroke boat motor. The leaking hydrocarbons from the fresh fuel combined with the leaking oil is a real mess for the environment.
this appears to being addressed in this new engine.
The first article makes no reference to direct injection 2 strokes so I would imagine it's old or just useless.Quote:
Originally Posted by twitchy
I'm not sure how much you've been following the outboard market of late, but if all 2 strokes are to be banned then you better tell all the major manufacturers about it because their primary development and marketing focus is on direct injection 2 strokes.
These motors use almost no oil, and less fuel than 4 strokes. As ever they are still lighter and cheaper than 4 strokes.
You should look into them... they really use virtually no oil, and definitely less than a 4 stroke does if you include their oil change. As I said earlier, the e-tec range (and probably others) can operate indefinitely at reduced power settings with no oil.
Important distinction to make here is the difference between Fuel Injected 2 stokes and the more traditional types. The older 2 strokes still have the exhaust port open when the inlet port is opened (position of piston). This little point allows up to 30% of the fuel/oil mix to exit directly out the exhaust - UNBURNT and into the water. Fuel injected engines like e-tec, Optimax and the one mentioned at the top of this thread don’t have this issue. Go across any well used bay and you can see the oil slick that hangs on the surface for ages marking the path of a carby two stroke outboard.
To say 2-strokes in their traditional form will be around for ever is a poor comment – why do you think that they have all had a star rating on them for some years now. In EU and US there are no bans on their sales but most areas now have bans on their use. Wide Bay Water (water supply for Hervey Bay / Maryborough) are the first authority in Australia to implement such bans – you have to have 2 Star or higher to be allowed on their dams. All new Carby 2 strokes outboards sold in Aus are 0 star. More bans like this will follow; it’s why the industry was forced into these ratings.
The only reason they outsell the injected 2s and 4 strokes is price – some sizes it’s double… I personally think that someone who buys a carby two stroke outboard in today’s climate is a bit of a hypocrite. They go out to enjoy a pristine water-way and leave 1/3 of their oil in the water…..