Fogging oil - what and how to use?

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RJJ

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Hi again

Thoughts on corrosion protection for engine, please? (Penta D2 55)

My current thinking is to spray fogging oil into the air intake, exhaust elbow and exhaust exit, then oily-rag the latter two. Volvo manual recommends a cold detergent rinse for the "microphone cover" sponge on the air intake.

Any observations, suggestions very welcome. Also, is there a practical benefit from "fogging oil" Vs WD40?

Thanks in advance.
 
I don't think it's necessary in the first place, but also I didn't think you could easily use fogging oil on a diesel engine.
 
I wouldn't use WD40 anywhere on a boat to prevent corrosion or for anything else.

It does not prevent corrosion. It washes off leaving a lovely clean surface that rusts beautifully. :disgust::ambivalence:
 
macd said:
It's good for dissolving the adhesive on vinyl stickers and lettering, but not uniquely so.
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It's basically white spirit with some light oil added.

Edit: For the pedants, I was referring to the original, traditional, common, Multi-Use product. The WD40 brand has dozens of different offerings today.
 
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pvb said:
It's basically white spirit with some light oil added.

Edit: For the pedants, I was referring to the original, traditional, common, Multi-Use product. The WD40 brand has dozens of different offerings today.
Click to expand...

The Long Term corrosion Inhibitor might be suitable but apparently my nearest supplier is a 10hr 30 minute flight away from London City
 
Fogging oil seems to be recommended for use on outboard engines at the end of the season. However - how to apply it?
I have seen instructions to squirt it into the air intake with the engine running, when it is about to stop, in order to lubricate the cylinder(s). To do this and with the engine running you risk leaving a deposit of fuel/fogging oil in the carburettor, I would have thought, which does not seem a good idea unless the intention is to dismantle the carb and clean thoroughly.
I tend to run the engine dry and then squirt a short burst of fogging oil into each cylinder.
Any other suggestions?
 
coveman said:
Fogging oil seems to be recommended for use on outboard engines at the end of the season. However - how to apply it?
I have seen instructions to squirt it into the air intake with the engine running, when it is about to stop, in order to lubricate the cylinder(s). To do this and with the engine running you risk leaving a deposit of fuel/fogging oil in the carburettor, I would have thought, which does not seem a good idea unless the intention is to dismantle the carb and clean thoroughly.
I tend to run the engine dry and then squirt a short burst of fogging oil into each cylinder.
Any other suggestions?
Click to expand...

Engines with a spark plug are best served, if you feel you must do something, by just removing the plug and pouring a couple of mls of engine oil into the cylinder and then turning over the engine with the starter cord/motor a few times before putting the plug back and storing the engine.

Richard
 
coveman said:
Fogging oil seems to be recommended for use on outboard engines at the end of the season. However - how to apply it?
I have seen instructions to squirt it into the air intake with the engine running, when it is about to stop, in order to lubricate the cylinder(s). To do this and with the engine running you risk leaving a deposit of fuel/fogging oil in the carburettor, I would have thought, which does not seem a good idea unless the intention is to dismantle the carb and clean thoroughly.
I tend to run the engine dry and then squirt a short burst of fogging oil into each cylinder.
Any other suggestions?
Click to expand...

Injecting fogging oil in to 2 strokes via the air intakes coats the bottom ends and crankshaft bearings. it is also recommended to inject some into each cylinder via the spark plug holes and to spin the engine a few times with the starter to distribute it.

4 strokes obviously don't need fogging in quite the same way the same way as two strokes. All that is usually recommended is to inject a little engine oil into the cylinders and to turn the engine over by hand a few times
to distribute it.

Your owners manual should describe what is required and how to do it.

Dont forget to change the gearcase oil, or at least to check the gearcase for water before storage especially if the engine will be stored where any water might freeze.
 
Thanks Vic - I'll follow your recommendation.:encouragement:
VicS said:
Injecting fogging oil in to 2 strokes via the air intakes coats the bottom ends and crankshaft bearings. it is also recommended to inject some into each cylinder via the spark plug holes and to spin the engine a few times with the starter to distribute it.

4 strokes obviously don't need fogging in quite the same way the same way as two strokes. All that is usually recommended is to inject a little engine oil into the cylinders and to turn the engine over by hand a few times
to distribute it.

Your owners manual should describe what is required and how to do it.

Dont forget to change the gearcase oil, or at least to check the gearcase for water before storage especially if the engine will be stored where any water might freeze.
Click to expand...
 
SAMYL said:
I wouldn't use WD40 anywhere on a boat to prevent corrosion or for anything else.

It does not prevent corrosion. It washes off leaving a lovely clean surface that rusts beautifully. :disgust::ambivalence:
Click to expand...

Ive seen a test that says otherwise. Although not the best in test, wd40 did prevent corrosion on untreated mild steel sprayed with salt water better than some products specifically branded as corrosion protection. Like I say, not the best product, but far from the worst.
 
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