Hi Guys and Girls,

The following link leads to a handy fuel mix chart.

http://www.manxyouthtrials.com/two-stroke.pdf

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Ed
Wanton C22/110
All I wanna do is sail
http://www.baysidetrailableyachtclub.com
Photo shows Wanton at Nara Inlet, Whitsundays, Qld.

The maths is so simple, yet the consequences of a stuff up so bad, and the probability of a stuff up so small yet inevitable in the long run.

The trouble is that it's expressed as "50:1" when you're not interested in how much petrol to add to your oil, you want to know how much oil to put in your petrol.

But reading the table it finally dawned on me...


Victa lawnmower, 25:1 = 4%.
1 litre petrol; 4x10ml = 40ml of oil.

My old Chrysler outboard, 50:1 = 2%.
12 litre tank requires 2x120ml = 240ml of oil.

INMA's Mercury with magic synthetic oil at 75:1 = 1.33%
12 litre tank requires 1x120ml + 1/3 x 120ml = 160ml of oil.

Never again will I think of 25:1, its 4%!

My Honda 4 stroke outboard, 0% oil. Even easier.

Four strokes! For the mathematically challenged!
(And engineers who don't want to do maths on weekends)

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A man's boat is his Castle. The Gippsland Lakes are my moat.

Ed,
On "Moody Blue" I have a little tag (Laminated print) hanging on the fuel line, that shows how much oil to add.

When the tank is part empty and topped up I then know how much oil to add based on how much petrol was added.

I'll post the file later from home.

Jeff

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"There is no perfect boat. There are only those shaded to your preferences.":-)

This is my chart that stays with my oil bottle.

The oil bottle is a measuring type with a 1 liter holding tank and a 15mm measuring tank on top with two caps.

Two stroke mix
Ratio

Petrol, 25:1 40:1 50:1 75:1 100:1
1, 40 25 20 13 10
2, 80 50 40 27 20
3, 120 75 60 40 30
5, 200 125 100 67 50
10 400 250 200 133 100 OIL ml

Edit, I can't get the columns to line up.

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RL24 Mk4 cruiser Mariner 5 2 stroke

A bad day in the Whitsundays is better than a good day at work. Unless you work in the Whitsundays.

Here is a copy of the Chart showing only the metric converstion table for fuel mix. I have added the measurment for 75:1 mix as well.

_________________
Ed
Wanton C22/110
All I wanna do is sail
http://www.baysidetrailableyachtclub.com
Photo shows Wanton at Nara Inlet, Whitsundays, Qld.

Thanks Wanton, much easier than having a brain aneurism every time you go to fill up the tank!!

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MacGregor 26S "Myuna"

You never mentioned this when you got me to mix you some two stroke fuel off Sandringham at Xmas!

Rotten sod made me do maths on a boat!

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A man's boat is his Castle. The Gippsland Lakes are my moat.

Zeb, its written on the side of the oil bottle now.

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RL24 Mk4 cruiser Mariner 5 2 stroke

A bad day in the Whitsundays is better than a good day at work. Unless you work in the Whitsundays.

Hi Guys

This is a good online mixing tool ... http://www.csgnetwork.com/oilfuelcalc.html

The bottom one is liters

Cheers
Byrds

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Compass C18 #?? "The Byrd"