Flushing Out Motor
Ok guys what about flushing out the motor with fresh water after use ?
My outboard is a 1999 Johnson 130hp V4 (2 stroke, 4 cyl) and I flush it with ear muffs.
I have been told to run/flush it when I get home for at least 10 to 15 minutes, so as to give the thermostat time to open.
Now this next point I have been told 3 different opinions by 3 different people.
1) I was also originally told, instead of switching it off at the key at the end of flushing, to actually switch off or disconnect the fuel, so as to run the motor out of petrol, so no petrol is left in the carbys, every time I flush it out. Like I said I was originally advised this a month ago by a very old boatie (maybe things have changed)
2) I have also been told it is not adviseable to run it out of fuel after flushing, because it can and will damage the power head.
3) I have been advised to only run it out of fuel when and if you are virtually winterising your boat for the wet season.
Which advise is correct ? Is there some truth to all the advice ? Are they all right or all wrong ?
Cheers.
.thumbnail.jpg "Mick's Mack from Steep Point")
Swan River Fisher
Posts: 877
Date Joined: 03/05/11
the 3rd one is correct. empty
the 3rd one is correct. empty the carbies of petrol when you are not using the motor for a while
till
Posts: 9358
Date Joined: 21/02/08
Not sure I'd advise that.
Not sure I'd advise that. With a 2stroke, no fuel = no lube.
aalfred
Posts: 669
Date Joined: 13/06/09
Have a look here:
Have a look here: http://fishwrecked.com/forum/flushing-motor
smash
Posts: 434
Date Joined: 01/12/10
tills probably right there
Not only no lube but super lean running is a killer on any petrol engine.
but there is also the fact with a carby that if its sitting for a longer period the fuel in the bowl will evaporate and and leave a gummy residue.
Id just do #3.
On the thermostat note-all thermostats have a leak hole to allow water past even when closed/cold. Otherwise the cooling passages would be bone dry til hot. So its not necessary to run it for 15 minutes annoying the neighbours with the old school "ring ting ting" of a 2stroke!
Note also-some people have brought across these practices (run it dry of fuel) onto their EFI motors. This can do immeasurable damage (well it is measurable in $$$$$$!) for no gain. EFI systems are sealed from the air and the fuel wont evaporate from the system for years.
sea-kem
Posts: 15028
Date Joined: 30/11/09
What's the point of letting
What's the point of letting it run out of fuel? I just run mine every few weeks in winter anyway. You can get a fuel stabilliser to stop it from going stale.
Love the West!
till
Posts: 9358
Date Joined: 21/02/08
I think its for 2st motors,
I think its for 2st motors, the idea is that the carby can get a bit crusty if you leave much premix in it, and the lighter vapors boil off.
sea-kem
Posts: 15028
Date Joined: 30/11/09
Ah, point taken. Bloody high
Ah, point taken. Bloody high strung two strokes lol.
Love the West!
Rig
Posts: 2925
Date Joined: 27/12/06
2 stroke
I run my 97 2 stroke dry, my mechanic says I don't have to but it doesn't matter either way
dodgy
Posts: 4580
Date Joined: 01/02/10
If you are going to run your
If you are going to run your premixed 2 stroke dry you should always make sure you prime some fuel into the bowls before towing your rig down to the ramp. (I always used to start motor at home the night before) as the carby floats bouncing in an empty bowl does nothing good for the tuning of multiple carbs.
Does anyone know where the love of god goes, when the waves turn the minutes to hours?
chris raff
Posts: 3257
Date Joined: 09/02/10
We used to run our 2 strokes
We used to run our 2 strokes dry then obviously on a cold start it would cough and fart for a while upon resusitation ...for along time now we just leave it in ....however we do use or run it to temp at least once a week starts first turn everytime...
The oil injected bigger engine , the mech said it was important not to run it dry ever... something about confusing the oil injection ratio...blah blah blah
IMO I've had more dramas running it dry than leaving it in...but yes you need to routinely run it to temp regardless if your using it or not.... 2 stokes need cranking up and run hard often I reckon ...they don't like sitting around
" Winterising" isn't that what the yanks do when it snows ...no chance here, even if I had to store it I'd make sure that engine got run...
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