| Author |
 Topic  |
|
|
Landor
United Kingdom
46 Posts |
 Posted - 01 May 2016 : 14:18:19
|
Hi,
Does anyone know if it is OK to use synthetic motorcycle 2 stroke oil in an outboard?
I have an Evinrude 30hp and an Evinrude 4hp I was going to get marine 2 stroke when someone in the shop said save some money and use motorcycle 2 stroke oil (as long as it's synthetic). It is good as it is motorbikes generally run at higher temperature.
Cheers |
|
|
cliveshep
Thailand
1324 Posts |
Posted - 01 May 2016 : 15:04:16
|
On an old engine not constantly flat out - most people do use whatever they can lay their hands on.
However, you ought to use fully synthetic in any event.
I used Quicksilver in my auxillaries and tender motors.
This article from the YBW archives might help:
"Marine oil is TC-W3 certified which means it's been tested for 100 hours non-stop in a marine engine. A non-marine oil (like motorcycle oil) has not been tested in a marine engine although might well be just as good as marine oil but without the TC-W3 certificate, you take a chance and if it's wrong can damage your outboard. However, there are some non-marine 2T oils (such as some motorcycle oils) that have TC-W3 on the bottle and are therefore TC-W3 certifield and these oils are likely to be also sold in a different bottle as boat oil and at a marked up price. So if it says TC-W3 on the bottle it's ok for your boat and if it doesn't....well you don't know as it's not been tested."
And from a 2-stroke engineer also on YBW:
"OK, as a two stroke Motorcycle engineer I have suffered nearly two decades of listening to 'Raiders of the lost Ark' ignoring simple instructions in a weird quest to prove some pointless point.
There are basically three types of Two stroke oil:
Mineral...This is run-of-the-mill (Usually SAE30) oil and leaves deposits galore. No modern engine should use this crap.
Semi Synthetic...This is the same thing but with added chemicals which aid combustion and hence clean up the carbon deposits. I avoid this, as it's still Mineral oil.
Fully synthetic...Is made from Esters, a bit like WD40, and burns cleaner, as it's not Mineral oil. Good quality synthetic lubricants usually have octane boosters to keep the piston crown in good shape, and leave vitually no deposits (Which grind away at your engine) so boost engine life several times over!
The Sunoco oil which is 'suitable for anything' is in fact utter crap I wouldn't run a rented chinese Generator on."
Hope this helps you decide!
Finally living the dream!
|
Edited by - cliveshep on 01 May 2016 15:05:14 |
 |
|
|
Landor
United Kingdom
46 Posts |
Posted - 01 May 2016 : 15:36:45
|
Thanks Clive,
I got some fully synthetic and will try on my tender outboard.
That's an interesting snippet from a 2 stroke engineer. I'll give it a try and see how it goes and keep checking my plugs.
Cheers |
|
|
|
Deano
United Kingdom
1843 Posts |
Posted - 02 May 2016 : 19:10:12
|
Aledgedly "Marine" 2-stroke oil produces less ash..... therefor the higher price...
I personally can't believe they manufacture 2 different products and let motorbike make more ash??? It makes no sense especially as the size of the marine market is so small.
Dean - Boating on the Great Ouse.
Freeman 32 "Liberty"
See the photos http://www.flickr.com/photos/54758027@N00/ |
|
|
| |
Topic |
|
2 Stroke oil
