Outboard 2 stroke oil

Submitted: Monday, Jul 06, 2009 at 19:38
ThreadID: 70444 Views:6641 Replies:7 FollowUps:5
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Would anyone know if you can use 2 stroke outboard boat fuel in a chainsaw?
I just do not want to carry to much premix or to many oil bottles.
I wouldn't use it the other way round but you may never know when you may need to clear some trees in a national park.

Honky
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Reply By: MrBitchi (QLD) - Monday, Jul 06, 2009 at 20:21

Monday, Jul 06, 2009 at 20:21
As long as the mix is similar then no problem.
AnswerID: 373359

Reply By: Member - Scott F (QLD) - Monday, Jul 06, 2009 at 20:35

Monday, Jul 06, 2009 at 20:35
Hi Honky, 2 stroke oil is critical with it's use, outboards are water cooled so run at a cooler temperature, chainsaws/mowers are air cooled & particularly chainsaws can run very hot! not to be substituted - one or the other. Oils are oils Honky. reddust
AnswerID: 373362

Reply By: Madfisher - Monday, Jul 06, 2009 at 20:36

Monday, Jul 06, 2009 at 20:36
I would not. One is formulated for an air cooled 2 stroke, the other for a water cooled 2 stroke. Outboards tend to run pretty cool, where as chain saws get very hot. At a pinch I would use a air4 cooled 2 stroke oil in and outboard but not the other way round, could end up seizing your chainsaw.
Cheers Pete
AnswerID: 373363

Follow Up By: Lex M (Brisbane) - Monday, Jul 06, 2009 at 20:43

Monday, Jul 06, 2009 at 20:43
Air cooled oil in an outboard will eventually foul plugs.
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FollowupID: 640525

Follow Up By: Nickywoop - Tuesday, Jul 07, 2009 at 06:36

Tuesday, Jul 07, 2009 at 06:36
Pete, you are spoton.

I am a retired professional fisherman, and in the closed part of the fishing season, (before machine harvesting came in) we used to go pine falling for a crust. Always used Stihl chainsaws, but used the raspberry coloured McCulloch 2 stroke oil in our saw mixes.

When the fishing season reopened we would continue to use the McCulloch oil in our Yamaha outboards but at the outboard mix. The outboards went like the clappers on chainsaw oil, and we never ever had any problems with them.

I would never use outboard oil in a chain saw as stated before.

Always be mindful that that all different 2 stroke motors have different oil to petrol mix ratios.

Nick
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FollowupID: 640550

Follow Up By: Madfisher - Tuesday, Jul 07, 2009 at 13:43

Tuesday, Jul 07, 2009 at 13:43
Hi Nick,
That brought back memories. Years ago I was the Hardlines manager for Waltons. Anyhow we sold that McCulloch oil, and it was very good. I am sure it was formulated by Castrol, as is Stihl oil today.
The yammies are an excellent motor, no wonder the japs have pushed the Yanks out.
Cheers Pete
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FollowupID: 640590

Reply By: MrBitchi (QLD) - Monday, Jul 06, 2009 at 21:01

Monday, Jul 06, 2009 at 21:01
Sheesh.. back when I had my clip-on (175 Evinrude) I used to run the outboard oil in all my 2-strokes, saws, weedeaters, mowers.Never ever had a problem.
AnswerID: 373371

Follow Up By: Best Off Road - Tuesday, Jul 07, 2009 at 10:13

Tuesday, Jul 07, 2009 at 10:13
Same here John,

I've got a swag of 2 stroke oil from when I had boats. Works fine in chainsaw (nearly 5 years old) whipper snipper etc.

Cheers,

Jim.

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FollowupID: 640568

Reply By: Maîneÿ . . .- Monday, Jul 06, 2009 at 21:10

Monday, Jul 06, 2009 at 21:10
I would not ....
reason being, my chainsaw how-to-use book specifically states NOT to use outboard two stroke oil in the chainsaw

Yes, for the exact same reasons as stated above

They are two different *types* of oils used in both different types of engines

Maîneÿ . . .
AnswerID: 373375

Reply By: Flywest - Tuesday, Jul 07, 2009 at 13:04

Tuesday, Jul 07, 2009 at 13:04
There are as others have said 2 different grades of 2 stroke oils for water cooled and air cooled 2 stroke engines.

The old oil specs were:-

TC2 (Two Cycle - 2nd generation)
TCW2 (Two Cycle Water Cooled 2nd Generation)

Now there are :-

TC3 (Two Cycle 3rd Generation)
TCW3 (Two Cycle Water Cooled 3rd Generation).

and some of the same grades in fully synthetic.

It's better not to mix them - and I certainly wouldn't run the water cooled oil in a air cooled chainsaw etc asothers have alreadyt saiod the water cooled run at much lower temps.

Best of Brittish luck with it - back when I was a nipper and the Two strokes were just new out they originally ran on 1/3rd of a pint of sump oil to a gallon of super! (And they smoked like all getout and fouled plugs all the time).

Things have come along way since then thank goodness

Cheers
AnswerID: 373448

Follow Up By: Madfisher - Tuesday, Jul 07, 2009 at 20:33

Tuesday, Jul 07, 2009 at 20:33
Fly west my old Dad still used engine oil in his chain saws right up to the eighties. He was one of the old type who did not like change. Anyhow could not work out why his saws did not last as long as ours.
Cheers Pete
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FollowupID: 640637

Reply By: Member - Smiley Bill - Wednesday, Jul 08, 2009 at 23:43

Wednesday, Jul 08, 2009 at 23:43
Hi Honky,

I'd keep c/saw oil in c/saws and o/board oil for o/boards.

Also note what the mix ratio is. If it is 25:1 (or there-a-bouts) the motor uses mineral based 2-stroke oil. If it is 40 or 50:1 it is probably designed for synthetic oil.

Oils aint oils.

SB
AnswerID: 373699

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