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| Two Stoke Oils for Stuarts- discussion. |
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Message |
    
Hans Poutsma
Advanced Member
Username: hansp77
Post Number: 33
Registered: 04-2006
| | Posted on Friday, February 08, 2008 - 03:27 am: | 
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I know there are many bits and pieces of advice on this subject throughout other threads,
but I thought it would be good to have a dedicated one.
So this a thread about oils.
What have you used, what DO you use, why, and are you happy with it?
and of course, add anything else you think is relevant.
For my P55, in my trial of errors I started off on two-stroke lawnmower oil (got the advice I was given mixed up the wrong way or something), at the moment I am using BP HiTiDE 2i, it was immediately available at the service station when I needed it, and no, I am not particularly happy with it. It may not be (entirely) the oils fault, but my plugs get gunky, I blow a bit of smoke, oil drips out my exhaust...
I would like to try something else.
I am thinking about trying some genuine Two Stroke SAE 30, but am not quite sure where to get it. (I found SAE 30 engine oil at my local Repco but am assuming this is a different sort of oil than two-stroke oil??- the Repco staff just shrugged their shoulders)
Either way I am looking for suggestions and experience in other products, to help figure out what to try next.
Myself, I would like it to be available in the Melbourne Area, or affordably postable within/to Australia- but advice or experiences DO NOT need to be confined by such,
Hans. |
David Myers
Advanced Member
Username: dave_myers
Post Number: 34
Registered: 11-2006
| | Posted on Friday, February 08, 2008 - 04:25 am: |
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Hans,
Any good 2Stroke Oil is OK. I use Valvoline Outboard. Do not use the newer Synthetic oils as they are for Hi-Speed Outboards and do not burn fully and oil up the plugs quicker. SAE 30 from Repco is what they used years ago and is what was originally recomended by most manufactures, but oils have advanced quite a bit over the years. The SAE 30 will soot up the plugs if too rich. I actually run at 55:1 mixture and seem to have less problems with fouling of plugs.
Stuarts are renowned for oily plugs and exhaust gunk. My P55 will foul up the rear plug if I run at low speed for any length of time so I give it a bootfull of throttle for 5 minutes and then resume my low speed. I drain the Crankcase on a regular basis, (generally every 3rd outing)and dont have many problems. Mine always starts with 2 turns of Choke and then a swift swing on the handle. It will start most of the time hot with just a pull on the flywheel by hand.
I did a full rebuild 12 months ago with Bearings, Seals, Rings etc available locally.
Of course your motor could be well worn too, so try the hotter plugs, they wont hurt. It is all a lot of trial and error. What works for one will not for another!!!
Keep smiling mate. It is all in the fun of it.
Dave |
Hans Poutsma
Advanced Member
Username: hansp77
Post Number: 34
Registered: 04-2006
| | Posted on Friday, February 08, 2008 - 04:55 am: |
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Still smiling Dave,
and thanks for the post,
I am still envious of your engine, especially your ease-of-starting, and await the chance to pull mine out and re-build... but in the mean time as a rebuild won't be coming around any time soon I will be trying every trick in the book to get it running as curse-free as possible.
I will try the hotter plugs tomorrow, and also try again to locate the drain plugs for the crankcase- I have had a bit of trouble locating these (would really appreciate a picture if anyone has one available) as I can't get a good enough angle to look at the area properly and what I can feel down there just doesn't seem right yet. With the rusty state of the engine down there I don't exactly want to just start pulling out random bolts.
Come to think of it, I should take a mirror and a torch out there tomorrow, should help with viewing.
I am not sure if the HiTiDE 2i is synthetic or not. As yet I haven't seen the Valvoline Outboard oil in any of my petrol stations- I will look around for it.
Hans. |
Mark Deverell
New member
Username: weysail
Post Number: 1
Registered: 01-2008
| | Posted on Friday, February 08, 2008 - 05:17 am: |
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Hi All,
I was going to be using QuickSilver 2T oil this season, any comments on that? I have been using it for years in my old Seagulls without problems and have leaned up the mixture from 10-1 to 16-1 without causing any hiccups, no smoke problems etc. The 25-1 engines are fine on this oil, hopefully the STp55ME at 50-1 will be OK as well.
Mark |
David Myers
Advanced Member
Username: dave_myers
Post Number: 35
Registered: 11-2006
| | Posted on Friday, February 08, 2008 - 05:32 am: |
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Hans,
The Drain plugs are on the port side of the motor in the MIDDLE engine mount foot. There is one facing directly out from the motor and one on the side facing the front. They are 1/2 inch AF or some are 5/16 whitworth. Do not screw them right out as they are hollow and have drain hole in the side of the screw. You may have to poke a piece of wire or something in the holes to clear them.
Just one more thing to do....
Cheers,
Dave |
Hans Poutsma
Advanced Member
Username: hansp77
Post Number: 36
Registered: 04-2006
| | Posted on Friday, February 08, 2008 - 06:20 am: |
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Dave, excellent,
If I recall correctly that actually makes sense to what it appears like down there (as apposed to what the diagram in my manual had me looking for).
I'll let you know how I get on.
Hello and Welcome Mark, can't say I know anything about that oil- personally (though you can see how much I know) I would be hesitant to assume that because it was ok in the seagull it will be good in the Stuart. Seagulls are after all quite famous for leaving a decent slick, so unburn't oil may not be such a problem for them.
Might be fine- do you know if it's synthetic? |
Mark Deverell
New member
Username: weysail
Post Number: 3
Registered: 01-2008
| | Posted on Friday, February 08, 2008 - 09:08 am: |
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Hi All,
Well, you had me wondering about Quicksilver 2T oil, it doesn't say on the bottle! I went onto the Mercury website and it doesn't say there either, might be easier just to ask Fairways what to use? A bottle of 2T oil for gardening machines came with the boat but they are all aircooled.
Mark |
Hans Poutsma
Advanced Member
Username: hansp77
Post Number: 37
Registered: 04-2006
| | Posted on Friday, February 08, 2008 - 10:32 am: |
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Mark,
same with the BP HiTiDE 2i, I can't figure out if its synthetic or not
for the moment I am assuming it is, and as I am not overly pleased with it I am going to switch anyway.
Good luck with yours.
Hans. |
Mark Deverell
Member
Username: weysail
Post Number: 4
Registered: 01-2008
| | Posted on Friday, February 08, 2008 - 05:58 pm: |
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Hi All,
I've just spoken with Fairways Marine, they say, "use ANY marine 2T oil" (!), now if that doesn't keep the forum going for a year or two I'd be surprised. What harm would a synthetic oil do? on the other hand, what good could it do? Fairways Marine use a Nautilus product.
Cheers
Mark |
David Myers
Advanced Member
Username: dave_myers
Post Number: 36
Registered: 11-2006
| | Posted on Friday, February 08, 2008 - 06:55 pm: |
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Hi Mark,
Quicksilver 2T is not Synthetic. Nautilus is produced by the Shell Oil Co.
Synthetic will not harm any motor BUT... it will not fully burn and therfore will foul up the plugs at low speeds and gunk the exhaust as well. Synthetic is designed for 'HIGH-SPEED' Outboards and extreme loading. Our Stuarts are definatley not in that category.
One of the Chaps in our group was using Synthetic in his P55 and P5 and was always changing plugs. Now uses straight 2T and has no problems.
So any good quality oil, regardless of brand, will do as they are all manufactured to meet sertain requirements and must also, by Law, be compatable with each other.
As I mentioned to Hans, I use a 55:1 mix with the 2T oils and have no problems. You must remember that these motors were designed when oil technology was very limited, and so the 'Standard' mixes were set for an average use. With the newer oils of today you can experiment a fair bit.
I have some older motors with the white metal bearings which had a recommended mix of 33:1 now quite happily running on 45 - 50:1 mix with no signs of wear and very clean burning. The plugs run at a nice Straw colour wich indicates ideal mixture.
Good to have a discussion on topics like this as I believe everyone benefits from each other.
Cheers Mark,
Dave |
Mark Deverell
Member
Username: weysail
Post Number: 5
Registered: 01-2008
| | Posted on Saturday, February 09, 2008 - 05:21 am: |
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Hi Dave,
Thanks for that, I'll use up the bottles I have left rather than buy new. There is a lot of talk that the engine/crankcase compression needs the originally certified petrol/oil mix ratio to be maintained so as to get the compression for correct running. I have, admittedly, run my 1050's (but first used circa 1970) 102 Seagull on 16-1 with no problems and it is the sweetest running engine I have used. My P55ME is 1963 and apparently in good health. Any comments on the mix ratio or was it because of poorer manufacturing techniques that it was needed with other engines?
Cheers
Mark |
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