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Old 18 July 2017, 04:31   #1
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Not used boat for two years - old fuel?

As per title, put boat away end of 2015 season with a full tank of fuel (98) with the intention to use it in 2016 but didn't find the time! It was however serviced in Spring 2016 at Evinrude dealer (she is running an Evinrude 150 Ficht) so motor was run up at that time.

Since then she's not been started at all. I've finally dug her out of hibernation (she is kept in a dry barn which has a nice current of air running through it which doesn't get humid/damp). Do we think she is good to go or should I drain the tank and refill. If so, how do I get the old fuel out??! And if I do use the current fuel what is the worst that can happen - run lumpy/kill the plugs?

Cheers, 715
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Old 18 July 2017, 04:35   #2
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Make sure you replace the water/fuel separator filters. Ideally have one with a visible bowl. Water can kill injection systems. Other than that I've used some pretty ancient fuel.
Make sure it still smells something like petrol though
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Old 18 July 2017, 08:34   #3
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put some conditioner in it and dilute with some new fuel should be fine
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Old 18 July 2017, 10:09   #4
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Quote:
Originally Posted by jeffstevens763@g View Post
put some conditioner in it and dilute with some new fuel should be fine
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Old 18 July 2017, 17:07   #5
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I'm no chemist but I think I have read that the make up of the petrol which absorbs the fuel conditioner will have already be saturated from the heating and cooling of the surrounding seasons atmosphere so no point in adding more money ,this is only true if the tank is open to breathe which I suspect it will be , this is why fuel can keep in a plastic sealed can ok but not in your lawnmower , sometimes ther is a plus that most outboards are made to run on fuel availiable anywhere in the world and some of this is very low ron value so you won,t know till you try ,I think I would clean the carb up a bit first , these are my experiences not chemistry knowledge ,I personally have syphoned gallons of fuel out of boats especially mercruisers where the bus engine just wont run on poor fuel , my current Honda outboard seems much more ameniable
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Old 18 July 2017, 17:18   #6
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Start it, if it runs well just use it.
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Old 18 July 2017, 17:29   #7
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At the very least I would mix it with some new fuel, they're are plenty of post on old fuel here
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Old 18 July 2017, 17:37   #8
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If it starts use it
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Old 19 July 2017, 02:09   #9
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I had a very similar question a few months back, with engine a 75 Etec and fuel a year old. I did quite a bit of research and there seemed to be a lot of advice against using any kind of old fuel in these motors for fear of damaging the injectors. In the end I went on the side of caution and drained the tank off, kept the old fuel and used it for the lawn mower and car.
I drained it off by disconnecting the fuel pipe from the engine side of the primer bulb and attaching a hose to the bulb. I then hung this hose quite a bit lower than the boat into a can and used the bulb to start off the siphoning. Once flowing it kept going, even if slowly.
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Old 19 July 2017, 02:13   #10
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your car not fuel injected?
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