zoidberg
Well-Known Member
I've 'inherited' 3 outboard engines which haven't run for some years. I have some fogging oil. Is there any point in trying to apply it to these 3 o'bs? And if so, how best should I go about it?
Using fogging oil
- Thread starter zoidberg
- Start date
PaulRainbow
Well-Known Member
I don't see any point in using fogging oil until after you have run them. Give each one a good run and then fog it as you stop it.
<152587>
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Remove spark plug and spray in plug hole whilst rotating engine. If 2 stroke also spray down inlet tract, ensure throttle butterfly wide open to allow fog access to crankcase is the usual method to prepare for storage.
VicS
Well-Known Member
But the reed valves will prevent the spray reaching the crankcase unless the engine is spun over with the starter at the same time.
<152587>
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If it has reed valves. The op did not state make/model.
Spyro
Well-Known Member
Fogging oil should be sprayed in to the air intake while the engine is running. It will smoke a lot then conk out. That's when you leave it. It is only for use if you intend to lay it up for a while.
<152587>
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With the added possibility of bending a con rod as a bonus.
PaulRainbow
Well-Known Member
What ?
Fogging oil is designed to be sprayed into the engine whilst it's running. As it's running, how on Earth can it bend a rod ?
<152587>
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Scenario, Saturday afternoon, enjoying a brew with many others on the verandah of sailing club. Engineer (used in the loosest terms possible) with o/b in dunk tank. Whilst playing to the audience with his ability to produce much smoke introducing said fluid down the inlet tract probably overdid the purpose resulting in hydraulic lock. My 3 fitters are now on threat of a flogging around the fleet if they introduce it to a running engine.
Prasutigus
Well-Known Member
Greetings.
freeing oil down the sparkplugholes, good for the bores and rings
carb cleaner in the carbs, you're bound to have some gummed-up jets
oil change in the prop gearbox
consider new spark plugs and HT leads
nice new petrol of course
check out the S/W pump
what are they, old Evinrudes or Johnsons?
I presume you want them safely working so you can pass them on to cronies or flog them off?
The more cleaning the better, inside and out.
Let us know how you get on
Regards Prazzers
never heard of fogging oil in such an application, more for long term storage I thought?
freeing oil down the sparkplugholes, good for the bores and rings
carb cleaner in the carbs, you're bound to have some gummed-up jets
oil change in the prop gearbox
consider new spark plugs and HT leads
nice new petrol of course
check out the S/W pump
what are they, old Evinrudes or Johnsons?
I presume you want them safely working so you can pass them on to cronies or flog them off?
The more cleaning the better, inside and out.
Let us know how you get on
Regards Prazzers
never heard of fogging oil in such an application, more for long term storage I thought?
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PaulRainbow
Well-Known Member
If he's tipping liquid fogging oil into the engine whilst it's running he's an idiot.
I would only use spray fogging oil and used correctly i can't see how that could ever cause hydraulic lock. Sprayed into the inlet of a running engine (for a few seconds) and then stop the engine.
<152587>
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Yeah it was from an aerosol but as you can imagine over zealous application. You are quite correct as your assessment of his intelligence. The other point I disagree with the use of this treatment, it is supposed to coat the internals with preservant. Why introduce it to a running engine where it will be combusted?
PaulRainbow
Well-Known Member
If it's sprayed in with the engine running, for a few seconds, then kill the engine whilst continuing to spray for another couple of seconds, everything will be coated. Particularly relevant to 2T engines.
vyv_cox
Well-Known Member
Small outboards are so easy to work on that it would make far more sense to strip them and do the job properly. You can then remove any deposits, check that rings work properly and that all is otherwise well. Tipping or spraying oil into an engine in the hope that it will do some good is doomed to disappointment.
<152587>
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You appear to have lost the gist. We are not advocating some magic fluid to revive a failing engine but a preservative for storage.
vyv_cox
Well-Known Member
Are we??? That's not how I read the OP. The engines appear to have been laid up neglected for years and now he would like to revive them.
PaulRainbow
Well-Known Member
I suggested in post #2 that fogging at this point in time was a waste of time. They need to be run first, whatever that entails.
zoidberg
Well-Known Member
Thanks, guys. I've hoisted all that in.
I suspect I'll have one attempt to start each one, and the failures will be dispensed with. There are other priorities....
I suspect I'll have one attempt to start each one, and the failures will be dispensed with. There are other priorities....
steve66
Well-Known Member
Are we actually these engines run? Otherwise fairly pointless
Heckler
Well-Known Member
Fogging is for storing. What do you intend to do? If you want to start them then if they are turning over remove the spark plug and squirt some 3 in 1 or similar jollop in the cylinder and turn it over a few times. Important to use jollop with light oil in. WD40 doesnt. Take the carbs off, float bowls off, wire brush wire through the jets. Replace. Empty the fuel tank, put some fresh fuel in, make sure it runs to the carb and in to the bowl. Check by removing the drain screw. Go for it!
The advice about fogging oil, locking engine! barking! Thats what its made for.
Carb cleaner? Snake oil!
Stu
