Winter fogging or run it dry

bigdog · 10-20-2010, 10:28 PM

I have a Merc 4.3L V6

When foggining my engine for winter storage......

How much fogging oil should be used. I understsand this is sprayed directly into the Carb.

Never fogged engine myself before, but have watched mechanic. Seems like he only sprayed into Carb until it stalled.

Can you apply too much fogging oil ?

Thanks for your feedback.

Bigdog

chipj29 · 10-21-2010, 08:19 AM

Quote:

Originally Posted by bigdog

I have a Merc 4.3L V6

When foggining my engine for winter storage......

How much fogging oil should be used. I understsand this is sprayed directly into the Carb.

Never fogged engine myself before, but have watched mechanic. Seems like he only sprayed into Carb until it stalled.

Can you apply too much fogging oil ?

Thanks for your feedback.

Bigdog

When I fog, I spray into the carbs until the engine dies. Then I pull the spark plugs, and spray a little more inside the cylinder. I don't know if there really is such a thing as too much fogging oil, as it has never been a problem for me. I winterize 2 PWC's every season (for the last 5 years), and I summerize 4 snowmobiles every season (for the past 10 years).

LIforrelaxin · 10-21-2010, 01:21 PM

Quote:

Originally Posted by bigdog

I have a Merc 4.3L V6

When foggining my engine for winter storage......

How much fogging oil should be used. I understsand this is sprayed directly into the Carb.

Never fogged engine myself before, but have watched mechanic. Seems like he only sprayed into Carb until it stalled.

Can you apply too much fogging oil ?

Thanks for your feedback.

Bigdog

My opinion is that you can indeed over fog an engine, and that in most cases it happens quite often. The run it until it stalls attitude is a old and ingrained one. However unless you know positively that the fogging oil is going into all cylinders at the same rate one can get more then the others. You also run the risk of fouling the plugs, and often people do and then cause more damage in the spring when they try and get the boat started. If you prefer the more is better attitude my suggestion is spray some into the carbs, once the engine begins to suffer and run rough stop and kill the engine yourself... Then you can pull the plugs and spray a little more in the cylinders.

To much oil down the carb and into the intake, can cause excess build up. Then you have to run that build up through the engine in the spring... If you don't mind changing plugs every year then don't worry about it. But if you want to keep maintenance costs down, play it a little conservative....

Most people have to change their plugs more then necessary because of over fogging... It take and incredible amount of time to get that crap burnt off and out of the system when you over due it.....

witchboat · 10-21-2010, 02:12 PM

I had purchased and older 85 hp outboard that would not start when cold unless It was primed with starter fluid. Turns out the problem was the previous owner oversprayed the whole carb with the sticky fogging goo and clogged air inlets. So be careful with overspray

Kamper · 10-21-2010, 02:50 PM

Whichever way you go, I'd stil suggest draining the carb bowls and squirting some fogging oil, or WD40, into the jets.

Good luck!

VtSteve · 10-21-2010, 08:26 PM

Quote:

Originally Posted by LIforrelaxin

To much oil down the carb and into the intake, can cause excess build up. Then you have to run that build up through the engine in the spring... If you don't mind changing plugs every year then don't worry about it. But if you want to keep maintenance costs down, play it a little conservative....

Most people have to change their plugs more then necessary because of over fogging... It take and incredible amount of time to get that crap burnt off and out of the system when you over due it.....

I believe I found that out

Every year in the spring, my boat would run fine, but the speed and rpm's were always off. It took all summer long to get it to where it should be. Last year, I changed the plugs out and Wow! Instant help. Hopefully we did it right this time around, because the plat plugs are not cheap, and should last for years. And this is with an MPI, so no engine is immune.

Kamper · 10-22-2010, 07:37 AM

You guys do know that plugs can be cleaned, don't you?

ishoot308 · 10-22-2010, 08:06 AM

I have gotten rather spoiled with fogging my Evinrude Etec outboard. It literally takes less than one minute to do!

http://www.youtube.com/watch?v=PvNBF8Az0ic

Hopefully other outboard manufacturers will follow suit.

To answer the original question, I would fill your gas tank as full as possible using a marine fuel stabilizer like the blue Stabil, Startron, Valvetech, etc. Make sure to run your outboard some to ensure the stabilized fuel is in the engine. Fog your engine per manufacturers recomendations, then wait for ice out!!

I firmly believe that with the new ethanol laced fuels it is more important now than ever to fog cylinders. Alcohol (Ethanol) is a cleaner and it removes whatever lubrication is on your cylinder walls. Fogging at least adds some sort of long term protection to help against corrosion. Plugs are cheap, cylinder walls are not...

Good Luck!

Dan

Dan

10-20-2010, 10:28 PM	#1
bigdog Senior Member Join Date: Apr 2006 Location: Central MA-Gilford Posts: 1,451 Thanks: 347 Thanked 123 Times in 97 Posts	Winter fogging or run it dry I have a Merc 4.3L V6 When foggining my engine for winter storage...... How much fogging oil should be used. I understsand this is sprayed directly into the Carb. Never fogged engine myself before, but have watched mechanic. Seems like he only sprayed into Carb until it stalled. Can you apply too much fogging oil ? Thanks for your feedback. Bigdog

10-21-2010, 02:12 PM	#4
witchboat Member Join Date: Sep 2009 Location: BILLERICA/WOLFEBORO Posts: 27 Thanks: 1 Thanked 14 Times in 6 Posts	not a fan of fogging I had purchased and older 85 hp outboard that would not start when cold unless It was primed with starter fluid. Turns out the problem was the previous owner oversprayed the whole carb with the sticky fogging goo and clogged air inlets. So be careful with overspray

10-22-2010, 08:06 AM	#8
ishoot308 Senior Member Join Date: Feb 2008 Location: Gilford, NH / Welch Island Posts: 6,312 Thanks: 2,407 Thanked 5,310 Times in 2,071 Posts	Etec Fogging I have gotten rather spoiled with fogging my Evinrude Etec outboard. It literally takes less than one minute to do! http://www.youtube.com/watch?v=PvNBF8Az0ic Hopefully other outboard manufacturers will follow suit. To answer the original question, I would fill your gas tank as full as possible using a marine fuel stabilizer like the blue Stabil, Startron, Valvetech, etc. Make sure to run your outboard some to ensure the stabilized fuel is in the engine. Fog your engine per manufacturers recomendations, then wait for ice out!! I firmly believe that with the new ethanol laced fuels it is more important now than ever to fog cylinders. Alcohol (Ethanol) is a cleaner and it removes whatever lubrication is on your cylinder walls. Fogging at least adds some sort of long term protection to help against corrosion. Plugs are cheap, cylinder walls are not... Good Luck! Dan Dan

10-21-2010, 02:50 PM	#5
Kamper Senior Member Join Date: Jul 2005 Location: Thornton's Ferry Posts: 1,309 Thanks: 67 Thanked 172 Times in 128 Posts	Whichever way you go, I'd stil suggest draining the carb bowls and squirting some fogging oil, or WD40, into the jets. Good luck!

10-22-2010, 07:37 AM	#7
Kamper Senior Member Join Date: Jul 2005 Location: Thornton's Ferry Posts: 1,309 Thanks: 67 Thanked 172 Times in 128 Posts	You guys do know that plugs can be cleaned, don't you?