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Old 07 October 2015, 03:56   #21
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Could I ask, you say that you noticed the smell and presence of petrol only when you tilted the engine....

Could it be as simple as, and I and many others have done on many occasion, that you did not close the breather vent on the tank, allowing it seep out when in tilt position????
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Old 07 October 2015, 04:10   #22
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i was always under the impression you ran dry and have done for years but i notice with some 2st garden engines you cant run dry but they do have primer bulbs may be they drain back to the tank.
on the old moped 2st if left for a while the petrol evaporated and left a white powder on the float chamber walls guessing that was corrosion from the water content in the petrol on the aluminium.
also modern day fuel doesn't last as long in some cases only three months so i stabilize
every tank.
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Old 08 October 2015, 09:39   #23
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Could I ask, you say that you noticed the smell and presence of petrol only when you tilted the engine....

Could it be as simple as, and I and many others have done on many occasion, that you did not close the breather vent on the tank, allowing it seep out when in tilt position????
I'm sure it has happened many times but as a complete novice I'm a bit belt-n-bracers at the moment. First thing I checked when I saw the fuel was the vent and the filler cap itself.

Just run it again in test tank to run it dry but on turning off the fuel knob sod all happened!! the only way I could get it to run to a stop was to close the vent. Is it common for the fuel shut off valve to stick open even though the linckage seems to be functioning?
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Old 08 October 2015, 10:05   #24
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Hi, there's always a lot more fuel in the float chamber than you think especially if the engine's only ticking over. My Tohatsu 20hp 4 stroke takes ages but when I was at the dealers he simply unscrewed the drain plug and it's job done.
I always put a good squirt of fogging oil in each spark plug hole also when I'm putting it away for the winter.
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Old 08 October 2015, 10:45   #25
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always a lot more fuel in the float chamber than you think
Thanks Paddlers
It was still running after around 5 - 10 minutes, any idea how long I should expect it to run with fuel turned off?
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Old 08 October 2015, 11:10   #26
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No idea, sorry. Can you access the drain on the float chamber? I prefer this method anyway as I like to think that any crap will get flushed out with the fuel.
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Old 08 October 2015, 11:55   #27
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Thanks Paddlers
It was still running after around 5 - 10 minutes, any idea how long I should expect it to run with fuel turned off?
That sounds about right. The smaller the engine, the less fuel they burn. My 10hp, 2/ will run for a good 3 or 4 minutes with fuel disconnected, on tick over.
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Old 08 October 2015, 13:47   #28
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My Suzuki 25 4st runs for 15min
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Old 08 October 2015, 18:11   #29
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thanks guys I'll give it another go tomorrow, and be more patient.
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Old 09 October 2015, 05:11   #30
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Also rememebr if your inbuilt tank / shut- off valve is anything like my decrepit Johnson 4 not only is there the carb bowl but the fuel filter and 6" of hose to empty as well! The Merc (60) takes a good 2-3 mins when on muffs

Depending on the size of the bucket etc, opening the throttle slightly speeds things up!
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