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Old 06 October 2015, 11:26   #11
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Duplicate post - sorry.
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Old 06 October 2015, 11:27   #12
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Despite not suffering problems I always put a plastic tarp in the estate loadspace area before I go sibbing as my carpet is a delicate (?) shade of light grey. I also put the outboard on an old blanket so should it leak fuel or water it will be absorbed not trickle away somewhere.

I'm a just in case type of guy!

And don't misunderstand... I have no view that running dry is a problem... just never been my habit.
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Old 06 October 2015, 12:09   #13
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if useing an external fule tank use a spare fuel connector (on the engine) saves and damaging the fuel pum diaphragm.
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Old 06 October 2015, 13:20   #14
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That made no sense at all sorry, use the spare connector (on the engine) while running the engine out of fuel
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Old 06 October 2015, 14:13   #15
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Quote:
Originally Posted by slate1234 View Post
That made no sense at all sorry, use the spare connector (on the engine) while running the engine out of fuel
Integral tank on this one.

Thanks for all the advice guys, it seems that there is no right or wrong way with this situation, just a matter of preference.
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Old 06 October 2015, 16:55   #16
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Nope, there is a right and a wrong way.

Turn the fuel off and let the engine run till its all gone. As dubrus says, leaving fuel in the carb will eventually gum it up over time with oil.
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Old 06 October 2015, 17:21   #17
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>>> will eventually gum it up over time with oil.

That has to be a "might in some/extreme circumstances" not "will"... or none of my outboards would ever have restarted over decades of smallcraft boating??
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Old 06 October 2015, 18:00   #18
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varnish up doesn't mean your engine won't start, nor does the extra corrosion potential leaving fuel in the cylinders mean it won't start, heck it may not even make one iota of difference to your engine/s......but it does increase the chance of it. the varnish will burn off in the next heat cycle if it does start.

i can say 99% i have lost an engine due to not running it out of fuel. it was a suzuki 85hp 1990 ish model many years ago. i never used to run them dry but i started to notice performance degrading over time and eventually one cylinder lost a lot of compression. when the outboard shop put their mirror thing down the plug (this is long before the fancy digital ones) you could see where fuel and hence moisture had gathered at the bottom and subsequently rusted the ring we assumed.

the engine was a write off but i pulled the head on it anyway, you could certainly see evidence that the above was the probable cause and on the shops recommendation i have since never done it.

back then the oils were not as good which may not have helped my cause but the fact is fuel attracts moisture so why risk it?

TBH, i can't think of a reason NOT to run dry, i'm sure someone may have one but i can't think of one ATM?

edit- potential reason not to do it....seals will dry up, would probably happen anyway so maybe not a huge factor??. this is why i never winterise engines personally, i just run them every couple of weeks.
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Old 07 October 2015, 02:35   #19
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Owning a few Mercs in my day, I have never had a problem starting the following year by, as some above suggest, pulling the fuel line while running (for any length of storage time) and allowing the engine to shut-down through fuel starvation. For longer periods, say 4 months or more, I also concur with others above, fog the engine through the carb while running (this will lubricate bearing and needle bearings inside); and squirt a few drops of good two-stroke oil (if it's two-stroke) in the cylinder(s) after removing the plugs and high-tension wires way out of the way to prevent shock - cranking a few times before reinstalling the plugs/HT Wires.


If you have carb leakage install a new carb gasket kit (including fuel pump diaphram if that power level has one(don't put in the pump valves backwards)). Check and adjust float level. It's all fairly simple stuff. Good Luck.
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Old 07 October 2015, 03:54   #20
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When I was a teenager we had a selection of 2hp and 4hp 2 stroke engines. We always ran the fuel out of them as they were going to be stowed in the enclosed bilge of another boat.
Never had any problems.
The 20hp and 50hp 2 strokes (premix) I had later I always ran the fuel out and never had any problems.
The 90hp and 30hp automix engines I've had more recently I just turn off at the key and also haven't had any problems.
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