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Old 07 August 2015, 04:46   #11
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Cheers John
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Old 07 August 2015, 07:10   #12
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styl chainsaw accessories have a jug orange all marked off for 5.00
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Old 07 August 2015, 09:03   #13
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Thanks for that will have a look online to order one
Cheers.
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Old 07 August 2015, 09:10   #14
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Any idea on correct ratio mix for a mercury 7.5 outboard?
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Old 07 August 2015, 13:53   #15
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The snag with chainsaw, strimmer ones etc is they are designed to mix small fuel quantity at a time. Like a litre.
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Old 07 August 2015, 14:21   #16
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...and now need to find something that will measure 126ml...?
you really don't need to be that precise. 50:1 is a round number for convenience not because by some amazing coincidence the optimal ratio is actually bang on 50:1.
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Old 07 August 2015, 14:21   #17
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For what they cost have two tanks no need to guess the mix then decant when both half full to fill one tank, then mix full tank again 50-1 1litre of oil to 50 of petrol and divide for your mix and tank size some of the two stroke bottles use to have a window with a gauge to show the oil @ a given ratio.
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Old 07 August 2015, 14:29   #18
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you really don't need to be that precise. 50:1 is a round number for convenience not because by some amazing coincidence the optimal ratio is actually bang on 50:1.
As poly says on a fixed ratio your burning the same amount of oil at tick over and WOT.
That why auto lube came out a little out each way not going to hurt on oil ratio
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Old 07 August 2015, 16:09   #19
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As poly says on a fixed ratio your burning the same amount of oil at tick over and WOT.
That why auto lube came out a little out each way not going to hurt on oil ratio
I totally get that. But if this time your mix turns out to be more like 45:1 or 40:1 and your plugs are oiling and so next time you are a bit tight on the oil to reduce the risk of oiling, but a dodgy measure anyway means you are now at 60:1 which is a bit lean causing more wear and tear.

I'm sure 125ml rather than 126ml is fine. Afterall how did you measure the petrol volume to match up... Although fuel pump at a filling station is -0.5% to +1% accurate.
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Old 08 August 2015, 04:16   #20
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I bought one of these and refill it as it makes for very easy mixing!
Yamalube - Super 2 stroke Engine oil - 2-M - 1 Litre Yamaha Marine | eBay
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