Billows
Well-Known Member
Could you use the two stroke mix without problems in a 4 stroke engine.I am talking small sub 10hp engines here.
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Two stroke and 4 stroke
- Thread starter Billows
- Start date
fergie_mac66
Well-Known Member
I put old 2 stroke into the car
VicS
Well-Known Member
Should be no problem but if you are putting in a particularly oily mix, like Seagull juice, you might run into plug fouling problems or fuel:air ratio mixture problems
ianj99
Well-Known Member
Diesel car's run more smoothly and quietly with 1 or 2% of 2 stroke oil in the fuel. I use it all the time in my motorhome and it reduced the clatter of my 2L Rav 4 d4d.
lw395
Well-Known Member
You may get odd problems like oil fouling the carb if you only use a 4T engine now and then.
Otherwise, I would expect no problems with 50:1 or leaner, unless the engine idles a lot, in which case it might oil the plug.
In the days before catalytic converters I used to chuck the old mix in my car.
Otherwise, I would expect no problems with 50:1 or leaner, unless the engine idles a lot, in which case it might oil the plug.
In the days before catalytic converters I used to chuck the old mix in my car.
rivonia
Well-Known Member
I CONCUR
Avocet
Well-Known Member
Same here. In fact even with a cat, I wouldn't be too bothered (depending on how much 2 stroke you're looking at)! I'd happily chuck half a gallon of even 40:1 2 stroke into a nearly-full tank of petrol. I've had cat cars that burned a pint of engine oil every 1000 miles and the cat and lambda sensors were fine with it.
sparkie
Well-Known Member
Been using spare 50:1 in the lawn mower for years. No problems. Smokes a bit when it's been standing all winter but that's gone in a few seconds.
VicS
Well-Known Member
Correct mix for mine is 16:1 !
Seajet
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I use any remaining 2 stroke fuel in the ( cat' equipped ) car or lawnmower at the end of season, rather than risk old fuel in the boat outboard the next season.
It's only 100:1 - though I admit I tend to err on the rich side, not too much though as some engines object !
I was told by a lawnmower 'engineer' at our local garden centre ( Aylings near Midhurst, good place ) that modern unleaded petrol tends to jellify within 3 months, leading to problems with lawnmowers, strimmers, chainsaws etc at the next Spring time start of season; does anyone know if this is correct please ?
It's only 100:1 - though I admit I tend to err on the rich side, not too much though as some engines object !
I was told by a lawnmower 'engineer' at our local garden centre ( Aylings near Midhurst, good place ) that modern unleaded petrol tends to jellify within 3 months, leading to problems with lawnmowers, strimmers, chainsaws etc at the next Spring time start of season; does anyone know if this is correct please ?
VicS
Well-Known Member
Certainly not my experience.
I always keep 2 stroke fuel from one season the the next but I only keep full tightly closed metal metal cans to minimise contact with air.
I always filter it before use in the outboard and mix it 50:50 with fresh.
Anything over and above the 2 full 2 gallon cans that I usually keep goes in the Seagull, lawn mower, or the cat free car.
No idea how old the stuff was I filled the Flymow with last week but it ran perfectly, even started fairly easily. I know it doesn't like fuel that has really gone stale, nor does the Seagull, but I've not had any jellify.
However I'd not be surprised if problems arose with high alcohol fuel. I think I'd be more cautious with that or at least use a fuel stabiliser in any I was storing. Sta-bil seems to be favoured among outboard users in the USA for treating any fuel that going to be kept for more than a few weeks but I think 10% ethanol in fuel is common over there
Twister_Ken
Well-Known Member
Maybe he was thinking of the biofuel content in modern fuel. Fatty Acid Methyl Esters are supposed to be less stable and hygroscopic, compared with 100% fossil fuel.