Thread: OOPS! marine oil in aircooled chainsaw

its probably ok,
just fill it up with the correct fuel and run it
I always use a 25:1 oil mix

Originally Posted by zongatron

Hi Guys

Just bought me a new(secondhand) husky 340 chainsaw.
I blew up my old saw last week and didnt know why until yesterday when i read somewhere that you cant use marine oil in aircooled 2/strokes cause it doesnt handle the heat!

Problem now is that I ran a tank of it through my new husky before i found that out!!

Are there any 2/stroke afficionados who can tell me if i might have scorched the bearings or some other nasty already by running this wrong oil?

I ran about 3/4 of a tank through it.

I dont know if its coincidence or if it has something to do with it but the old girl also stopped spitting out chain oil halfway through that tank of fuel. ( i dont know cause its the first time i used the saw and maybe he sold it to me with a bung oil pump?)

Thanks guys
Zonga

How true is this??????

I have just cut down a tree and chopped it up. about 4 tanks with Marine oil and it still is working fine. Its a Huskvarna 371.

JAMC

Originally Posted by echnidna

its probably ok,
just fill it up with the correct fuel and run it
I always use a 25:1 oil mix

crikey 25:1! I dont know about Huskys, but I'm fairly sure Stihl recomend 50:1 for normal use and 40:1 for heavy duty work like milling.

Originally Posted by martrix

crikey 25:1! I dont know about Huskys, but I'm fairly sure Stihl recomend 50:1 for normal use and 40:1 for heavy duty work like milling.

Like Bob i use 25 : 1 or even 20 : 1 , never fouled a plug and never seized a saw. I use good quality sometimes even stihl oil that has 50:1 on the bottle - even the Dealer tells me use 25:1. A bit of extra oil is cheaper than a rebuild.

Thats only been for the last 30 years too.
cheers

G'day.
My Husky 36 manual says 50:1.
I run 50:1.

The saw is 10 years old.
Still on the original plug.
Has never missed a beat. Always starts 2nd pull.

3 bars and lost count of chains.

Extra oil doesn't harm the chainsaw. I use only genuine Husky oil.

It also means that all the 2 strokes here all share the same fuel can,
So some twit at a working bee can't pour the wrong fuel into an engine and blow it up.

Thanks guys, i think she'll be okay.

Jarrah - Change your oils immediately. If you start googling it its a definite no no using marine oils. Think about it - most marine engines are water cooled and therefore run cooler than your chainsaw. Your saw will eventually overheat and die. It took about 8 tanks to kill my old jonsered. And she started running funny before that... And it will be doing bore/cylinder damage before that too.
Theres things like marine oil has more ash in it blah blah blah
There may be a slight debate about synthetic high quality marine oil being okay, but I aint risking it.

And for you other ratio guys, there is also a bit of talk about more oil in the mix doesnt actually make it run cooler for some reason. They say that a leaner mix runs cooler. I dont really understand, but these guys are on a 2/stroke forum so i guess theyre into it...
Oils aint oils it seems.

I got advised to remove the muffler, drop a few drops of oil (aircooled oil) directly onto the cylinder then flush a correct mix through it to flush it all through.

And besieds all that - I downloaded the husky manual and in amongst all that it says... - Never use marine oil in your chainsaw.

it'd be easier to pull the sparkplud to drop a bit of oil in

Too much oil or the wrong grade oil in a two stroke mix can definitely cause problems..unburnt oil in the crankcase which can build up, excess carbon build up on the exhaust port and inside the muffler, fouling spark plugs..to name just a few. I agree about NOT using marine two stroke oil, and for the likes of Husqvarna there is no advantage in using the genuine oil at more than the recommended rate (50:1). Having said that, I don't believe any harm would come by mixing at 25:1.

The instruction book for my sthil says 50/1 if using sthil oil otherwise 25/1 for other oil. They also say 25/1 to run in a new saw.

The wrong oil wont wont instantly kill your saw. It will just lead to poor lubrication and carbon buildup that wears it out faster over time.

Just dump whats in the tank and go back to the correct stuff. It wont have been enoug to do any serious harm.

Oiler probelm will be unrelated.

Ian

all air cooled 2 strokes should be run at 25:1 unless you use a special oil sutch as stihl that states to use it at 50:1. using the generic oil you get at the hardware or servo at 50:1 will cause the engine to cark it.

as for marine oil i have used it many times without any problems.

it may be watterd down to make it go farhter this would not matter in a wattercoled engine but using it in an air cooled engine will cause it to tin out to mutch and not give adequite protection. stihl oil is a lot oilyer oil so you can mix it less.

that is the theory anyway.

Originally Posted by orraloon

The instruction book for my sthil says 50/1 if using sthil oil otherwise 25/1 for other oil. They also say 25/1 to run in a new saw.

Mine says the same - so does my husky book for the whipper snipper - use husky oil at 50:1 other oil at 25:1.

I use husky oil in both at 37:1

woodcutta