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Old 25 August 2012, 20:03   #1
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can water emulsify with petrol oil mix fuel in a carb

Tohatsu 50 on pre mix
After a strange running problem on the way home yesterday , engine missing badly over 4k revs, but ran ok on steady slower cruise .
I drained the tank and found no water , there was a drip of water in the fuel line when i drained that . fuel filter on the engine clean .
I drained each carb individually , top 2 clean bottom carb had cloudy fuel in it . No water droplets as i would expect to see .

I haven't a clue how it could get there if the tank had no water in it and the filter bowl was clean . even if it managed to suck in a little water while running it i wouldn't expect it to end up in the float chamber surely ? .
And i don't think i have ever seen water emulsify with fuel like that without dry fuel aditive etc .
Its only done about 20 hrs since i stripped the carbs . I have been out in some pretty rough weather and surf etc . but had cruised a fair way yesterday (eddystone etc) and burnt well over half a tank ful before it played up .
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Old 26 August 2012, 00:30   #2
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Water won't emulsify with gas (or oil, or gas plus oil) without a hell of a lot of agitation, and even then it will fall out fairly rapidly.

I'd suspect that the cloudy stuff was dirt, rust, sludge, or other foreign stuff.

jky
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Old 26 August 2012, 02:49   #3
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'ello mate

I second what jyasaki said.


Try draining your tank and rinsing it out a bit of fuel mixed with some Wynns dryfuel.
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Old 26 August 2012, 16:12   #4
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Hi Nos
thats what i thought . I left the milky fuel in a container to try see if would settle out , it didn't .
As i said tank and filter was clean , I drained it first . and i only had the carbs stripped a month ago when i fitted boyesen reeds si i know the system is all really clean .
Anyway it ran fine today and no more milky fuel present in the carbs this eve . I guess it will remain a mystery .
Bit lumpy today
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