Quote:
Originally Posted by trout1105
Isn't filling the boat up it a bit extreme as well as very dangerous. I mean, where would you sit? You'd really be better off filling the tank up I reckon.
[biggrin]
Oh, I see what you mean.[smilebigeye]
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Quote:
Originally Posted by trout1105
Isn't filling the boat up it a bit extreme as well as very dangerous. I mean, where would you sit? You'd really be better off filling the tank up I reckon.
[biggrin]
Oh, I see what you mean.[smilebigeye]
From WikipediaQuote:
Originally Posted by trout1105
"An octane rating, or octane number, is a standard measure of the performance of an engine or aviation fuel. The higher the octane number, the more compression the fuel can withstand before detonating (igniting)."
IIRC they have more mid-range volatiles that allow them to do this.
No extra energy in the fuel (of note), but having a higher compression ratio in the engine design means that more energy can be extracted for the same amount of fuel.
Modern petrol engines with direct injection overcome octane limitations and have a higher compression ratio than port injected engines through introducing the fuel at a later stage of compression.
Of course you will detect a difference, smoother more powerful.Quote:
I will run the tank super low and fill the boat up with premium ans see if there is any notable differance[thumbsupbig]
it's called the halo effect.
Regards Philip A
so, what happened to the previous engine?
https://www.aulro.com/afvb/attachmen...707_112536.jpg
It's the same engine, 115 Suzuki 4 stroke.
Attachment 145125
Attachment 145126
The main thing with a 2-stroke is to use a quality 2T oil, like Evinrude XD100. It is exxy, but more than worth it. Also a dash of Stabil with each new batch of fuel if it gets stored away.
A good two stroke oil will have calcium sulfonate as an additive to combat moisture and corrosion.
It should be listed, it's also used in racing two stroke oils to stop throttle sticking in slide carbies, and to prevent corrosion when not in use.
Thats it, its made from lighter fractions when refining. You can run more compression, more ignition advance and it will burn better at higher RPM - I don't think any of these will apply to the boat. The other thing to consider is that it is significantly more castnogenic in both the fuel and the emissions, and it is more important to keep the fuel cool and sealed so the lighter fractions don't vapourise out.Quote:
Originally Posted by bsperka
I have tried the premium now and won't be using it again.
There was No noticable differance in performance or fuel economy and the engine tended to idle a little roughly using the 95 octane fuel.
Ah well if you dont try something you will never know.
If it's tuned to run on unleaded then I doubt if there would be any advantage in using premium.
Not a two-stroke of course, but I haven't noticed any advantage in using premium in our Mazda 2 - it's perfectly happy on unleaded or E10 and no difference in performance or economy that I can notice.
