Thread: OOPS! marine oil in aircooled chainsaw

Originally Posted by zongatron

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.

Thanks Zongatron

I will do just that and empty the mixed oil into the ride on. Won't hurt it.
I really appreciate the information as i would have blown up my lovely chainsaw soon.

Once again Thanks
JAMC

My Dad was a dairyfarmer of the old school.He'd just add a good slurp of sump oil to the fuel(super). Used same in the bar oiler Never serviced apart for the occasional new plug. That old McCulloch went for decades with that sort of treatment....

Peter.

we had an old mobil co we did the same with. the new saws just cant take the sump oil in the fuel but it works fine in the bar. a bloudy lot cheeper to.

its like the old deisels that could run on crude oil. not any more with the computers and filters and jets they have.

I am with Weisboy on that. Any old oil on the bar ( if you keep it up to the bar) but the good oil in the fuel mix.

I used marine oil for 12 months in the mower (suzuki 2 stroke) chainsaw (old husky 60cc) and brushcutters. Never seized one but they never ran sweetly. Use proper 2 stroke oil now. Wish I'd read this thread before I decided to be tight ????? and use up all that old valvoline marine oil that is unused now that I have a four stroke outboard.

use the excess marine oil in the bar or mix it half and half with bar oil

Well i just got the old jonsered back from the shop. Its the one I seized. At the time i put it into the shop to get diagnosed i didnt tell the bloke i was using marine oil because at the time i still hadnt read about it and didnt think it was an issue.

Sooo, the point is, i got it back today and he'd pulled it apart to see what needed fixing and - he said it seized because it had no oil in the fuel...

So morale of the story is. Dont use marine oil in anything that isnt watercooled. Or unless its an emergency. And then i would load it up a little with more oil in the mix