FOGGING

[n1111z]

OK I feel like a total DA for not knowing the answer to this but WHAT IS FOGGING? Directions to a couple basic threads would be appreciated.

 

[biffdotorg]

Engine fogging is putting a layer of fogging oil in the cylinders and air plenums of the engine. This was more common in two stroke engines, It’s still recommended by Yamaha when storing for a period of time. There is actually a hole in the intake for spraying the fogging oil while running, and it should stall the engine. Then folks will pull a spark plug and spray it down in the cylinder.

Us folks in the North do this as part of winterization. If you use your boat year around, you may never do it.

Good luck,

 

[Ratket]

^ What @biffdotorg said.

 

[biffdotorg]

I stopped fogging my 4-cylinder 4-stroke Yamaha Snowmobile, as I could not get it to stall out. If it stalled 2 of three, the other two would keep it going and then burn off the fogging oil as fast as I could spray it. And the spark plugs are too hard to get at.

With these boats, it's pretty easy.

Many will advise, if you plan on swapping plugs, after you have fogged, do it after you burn a tank of fuel. This will ensure you are putting in new plugs into an engine running clean fuel with no oil left.

Good luck!

 

[Scottintexas]

it should say something about it in your manual,
I believe the 1.8l have a special attachment point in the fuel supply to hook up your fogging oil,
for the older mr1's we just take the air filter off and spray into the throttle bodies, some people remove the spark plugs and spray and bunch in the cylinder and then crank the engine (without spark to lubricate the walls),

 

[swatski]

Engine fogging is putting a layer of fogging oil in the cylinders and air plenums of the engine. This was more common in two stroke engines, It’s still recommended by Yamaha when storing for a period of time. There is actually a hole in the intake for spraying the fogging oil while running, and it should stall the engine. Then folks will pull a spark plug and spray it down in the cylinder.

Us folks in the North do this as part of winterization. If you use your boat year around, you may never do it.

Good luck,

Dammm... I get it!
I always thought it meant all the 2-strokers starting up in my marina on weekends.

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[Thats]

Necro'ing this thread.

I'm up here in the Northland - Biff is saying it's fine to fog, which I agree with him. What do most of you guys think about fogging a 2007 AR210? Needed? Just nice? She'll be sitting outside all winter long. Seafoamed tank. Shrink wrapped, batteries pulled.

Would probably do this entire shebang:

 

[Ratket]

At the end of the day, it can’t hurt. So if it makes you feel more comfortable, do it.

 

[Scottintexas]

if your boat is going to sit for more than a month or two I would definitely recommend fogging it,
as biff said if it won't stall out you're probably just burning it up, it's good for the throttle body but after I sprayed it in the breather I'd probably pull the spark plugs and spray some in the cylinder and rotate the engine without a spark to hopefully lubricate the walls,

using anti-freeze, that's another conversation in a different post,


.

 

[gthh]

I live in Buffalo NY and have an 2007 AR230 that sits outside and never fogged my engines and never ran antifreeze through the water jackets. I may be the luckiest @#$@%$ on the planet but this was my 18th consecutive season of boating on the lakes and my MR-1's run like a top for every one of those seasons!

Keep in mind your engines are not MR-1 which in my opinion are "bullet proof".

I and others here in the Forum take pride in the fact that winterization for Yammie can only consist of a couple of revs of the motors, changing the sparkplugs/oil, Stabil in a full tank gas and wrapping her up.

$50 bucks and a couple hours of work!

My brother has a similar sized Caravelle and spends $300 or more winterizing his boat.

 

[Thats]

if your boat is going to sit for more than a month or two I would definitely recommend fogging it,
as biff said if it won't stall out you're probably just burning it up, it's good for the throttle body but after I sprayed it in the breather I'd probably pull the spark plugs and spray some in the cylinder and rotate the engine without a spark to hopefully lubricate the walls,

using anti-freeze, that's another conversation in a different post,


.

The more I read... The more people seem to go "Ehhhh" and not really saying a definitive answer.

Thanks and sorry for necroing the thread.

 

[Scottintexas]

As I posted previously, anti-freezing is a whole different discussion,

for fogging - fogging is also very subjective, it's used to prevent corrosion in your fuel supply and cylinder walls, most of which without tearing an engine apart we'll never know the results,

in all the years involved in this board I've never heard of anyone having engine problems and found their cylinders corroded or ring problems because of lack of fogging,

that said, I believe in fogging because it makes sense in my mind and Yamaha recommends it in the manual,
if I was going to store my boat for more than "a few" months I would be fogging it not because it would prevent a problem but because it could,



.

 

[Gym]

Fogging is recommended by Yamaha in a tech bulletin issued 6 or 7 years ago. I believe @txav8r brought it to our attention. Fogging not only protects the cylinder walls but also the valves and can help prevent sticking valves which can happen during storage periods. Fogging is also suggested periodically during the boating season if you boat in salt water.

As stated spray it into your air induction system till the engine dies. Then spray it into each spark plug hole, cover the holes with an old towel and crank the engine for a second or two to distribute the oil. Replace your plugs. One of our members from NY did a great fogging video that should be in the FAQ section.

 

[swatski]

I would add blowing water out of the system (once on a lift or a trailer) as a part of the winter routine!

Ever since I had a frozen cooling line that caused overheat alarm last year I use a small boat Pali heater in my engine bay -

https://jetboaters.net/threads/freezing-weather-overheat-alarm-fixed.20335/page-2#post-347519

I don't fog but I ride year round and stop only when it actually ices over, usually a week here and there.
I love winter cruises - so peaceful with no one out.
I have company at my marina, lol, some guys never stop.


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