Rotax 582....Which oil to use?

[JJJ]

Ek hoor die autolube gebruik BAIE minder olie.
JJ

[Graham Mac]

Ek hoor die autolube gebruik BAIE minder olie.
JJ

If it uses less then its running too lean and will sieze.....Shurely?
50 to 1 and should not be less...looking for TROUBLE.

[Smiley]

Smiley hou daai Autolube systeem.

Niks beter as die autolube vir jou enjin nie

groete

HI Sukkelaar

Met my "lose it" reply hierbo bedoel ek sy hulp...

Ek sal verseker nie die autolube afhaal!!

[Nacho]

At the end of the day it is a personal decision. I can say all I want, its your call

I just hope you guys never have to see what I have seen when the auto lube fails.

Hopefully you will never have too.

Fly Safe

[Sukkelaar]

Autolube uses way less oil than the 50to1 premix

Would estimate my usage to be about 15-20 to 1 but have never checked it for sure.

Engine gets what it needs with no wastage, and directly where needed.

Engine also receives oil all the time while motor is running (in correct amounts) and not too little sometimes. (as with premix)


regards

[Dobbs]

Sukkelaar, you have hit the nail on the head, under low power conditions, the engine does not need any where as much as 50:1, there is low heat, the bearings are not having maximum forces imposed on them etc.

I have heard of many people who have removed their autolube systems because of someone who knows someone who heard somewhere that theirs failed and the result was a siezed engine. Yes, you will pick up problems with your autolube if it is mismanaged, such as dirt ingress, but then what's really at fault.

I am also not guarenteeing that they will never get trouble, but herewith my experience

I have in various stages been involved with both 2 stroke outboard engines as well as 2 stroke bikes, and I have never met anyone who has personally suffered any type of failure due to autolube problems

[Triker]

"..Engine also receives oil all the time while motor is running (in correct amounts) and not too little sometimes. (as with premix)..."

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Please explain how a machine gets too little sometimes, when its premixed with the petrol(50:1)?
The only reasonable explanation then would be that the motor doesn't get petrol Which then does not run the risk of seizing up.


If you premix the oil with the petrol, you get a 100% guarantee that the motor gets its oil.
Just my 2c's

[Sukkelaar]

Hi Triker

In a Long descent you would come off the throttle and glide, The throttle will be closed but wind will cause the prop to turn and this in turn will increase engine revs, so only enough fuel to idle the motor is entering the carburetor with premix (as your throtle is closed), where as with the autolube it is working in conjunction with engine rpm.

I hope this makes sense

regards

[Graham Mac]

Hi Triker

In a Long descent you would come off the throttle and glide, The throttle will be closed but wind will cause the prop to turn and this in turn will increase engine revs, so only enough fuel to idle the motor is entering the carburetor with premix (as your throtle is closed), where as with the autolube it is working in conjunction with engine rpm.

I hope this makes sense

regards

Possible from 30 000 ft otherwise...extremly doubtfull....to put it diplomatically.most two strokes dont fly that high.
always on a long glide decent you should put a bit o power anyway to avoid carb ice and or cold sieze.
PREMIX.....FUCHS TCW3 MARINE....50 TO 1 Thats the one..like a LEXINGTON.After action satisfaction.

[Sukkelaar]

Hier gaan ons alweer

Read the following threads

viewtopic.php?f=13&t=9526&hilit=Autolube

viewtopic.php?f=13&t=6395&hilit=Autolube



With premix the oil is held in solution (dissolved) in the petrol. This in turn is vapourised by mixing with air in the carb. When this vapour enters the engine crank case it will 'wet' the entire inside of the engine including the important crankshaft and con rod bearings through condensation. The oil ratio must be chosen to ensure sufficient oil condenses to lubricate the important bits. (Normally between 20 and 100 to 1 fuel oil ratio).

By using an auto lube - basically just a dosing pump - the oil is pumped directly into the crank case and in some engines directly to the crankshaft bearings. The oil is already small droplets and the fuel mixure is merely the wind that carries these drops onto the parts that are not directly fed from the pump.

All the mixture - air/fuel&oil vapour - in the crankcase is then fed into the combustion chamber through the transfer ports during the intake stroke and the spark plugs now have to deal with it.

During the compression stroke, the oil is somewhat squeazed out of suspension and condenses as small oil droplets on the coldest part of the combustion chamber - the spark plugs. This is why it is so important to check the plugs every 12 hours. (Notice the oil on them).With premix, there is more oil for the plugs to deal with.

Using premix, the oil gets into the engine through the carbs, and therefore the air fuel ratio will also effect the amount of oil present. A rich air fuel mixture will also result in a rich oil ratio present in the combustion chamber. As the carb needles vibrate in the needle jet, they wear resulting in the jet getting larger and the mixture getting richer. Also as the air filter begins clogging with dirt, the air fuel mixture gets richer. All of this adversly effects the spark plugs ability to spark.

Using autolube, the oil ratio is only relative to engine RPM. Poor carb and air filters condition will not effect the oil ratio.



regards

[Vatso]

I am not a fan of auto lube unless like on my boat it has 2 tanks a main tank and a reserve tank which if it starts getting empty let's one know. So the motr can be turned off in time.

If one is not running filters on there fuel / oil line it's only time these will get dirt in them which means one should check them all the time.

And to check spark plugs really does not take a long time!

Another interesting point if a motor is not under lots of load it does not need masses of oil for lubrication no amount of oil can fix a motor running to lean!

[Loco]

Hi, what's the disadvantages of premix besides using more oil and being a slight inconvenience?

Thanks
Ant

[John.com]

Hi, what's the disadvantages of premix besides using more oil and being a slight inconvenience?

Ant, turn that around rather . . . . the ADVANTAGES of premix, assuming you get the mix right, is that you are guaranteed of lubricating your engine.

Although I have no access to facts supporting 'autolube failures', an autolube system, purely due to the fact that it is a mechanical pump of sorts, could fail, resulting in blowing your motor! And there is no need to consider the consequences of that happening!!

Rotax provide a blank that allows you to remove the autolube system and then use premixed fuel.

Safe Skies!

John