Fogging an outboard

tacx

Petty Officer 1st Class
Joined
Aug 26, 2017
Messages
215
This summer I picked up a 1970 9.8 110 mercury. Getting ready to put it into storage for the winter in Michigan. Do most people fog these engines for storage?

I usually fog all my 2 cycle engines like weed wackers, etc, etc?
 

tommarvin

Ensign
Joined
Nov 22, 2015
Messages
999
YES, good for you.
You want to warm the motor up to temp, on muffs as you know.then snuff the motor/kill it with fogging oil,and spray some f oil in eash cylinder too, put the cleaned and tested plugs back in finger tight till next season.
Your should do a decarb first, its just 16 oz of seafoam mixed with 32 oz of fresh gas, remove the outlet side fuel line of the primer ball,add 16 inchs of clear fuel line with a coupling 1 gallon glas jug ,run it all thru the motor
Drain and fill the gear lube too.with marine gear lube new blue seals that cost 1 buck a piece..
 

tacx

Petty Officer 1st Class
Joined
Aug 26, 2017
Messages
215
YES, good for you.
You want to warm the motor up to temp, on muffs as you know.then snuff the motor/kill it with fogging oil,and spray some f oil in eash cylinder too, put the cleaned and tested plugs back in finger tight till next season.
Your should do a decarb first, its just 16 oz of seafoam mixed with 32 oz of fresh gas, remove the outlet side fuel line of the primer ball,add 16 inchs of clear fuel line with a coupling 1 gallon glas jug ,run it all thru the motor
Drain and fill the gear lube too.with marine gear lube new blue seals that cost 1 buck a piece..

Blue seals ?? Not sure what blue seals you mean?

Tom
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
49,502
YES, good for you.
You want to warm the motor up to temp, on muffs as you know.then snuff the motor/kill it with fogging oil,and spray some f oil in eash cylinder too, put the cleaned and tested plugs back in finger tight till next season.
Your should do a decarb first, its just 16 oz of seafoam mixed with 32 oz of fresh gas, remove the outlet side fuel line of the primer ball,add 16 inchs of clear fuel line with a coupling 1 gallon glas jug ,run it all thru the motor
Drain and fill the gear lube too.with marine gear lube new blue seals that cost 1 buck a piece..

you cant run a 9.8 on muffs.

that motor would run a week on 32 oz of gas
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
49,502
tacx , drop your 9.8 into a bucket, fire it up, unplug the fuel line and hose down the intake for about 30 seconds with fogging oil. the motor would run for about 3 minutes at fast idle with the fuel in its carb.

then pull the 9.8 out of the bucket, drain the carb (small screw). now is a good time to change the lower gear lub.

then either hang the motor on a stand or lay it on its back
 

tacx

Petty Officer 1st Class
Joined
Aug 26, 2017
Messages
215
Scott, yes you are correct. The water intake is under the ventilation plate. The only way to run on muffs is to remove the prop and install the muffs vertically over the intake and above the plate to hold it on. Much easier to just run it in a bucket making sure the water level is above the impeller level.
 

dingbat

Supreme Mariner
Joined
Nov 20, 2001
Messages
16,060
I gave up fogging 2 strokes after rebuilding a couple of them.

Everything completely saturated with oil residue even after sitting unused for 2-3 years.

If you think the cylinder walls are “dry”, try welding on one ;)
 

Sea Rider

Supreme Mariner
Joined
Sep 20, 2008
Messages
12,345
Never winterize my 5-30 HP babies, start them up on muffs or barrel once a month, let them run at idle-fast idle for 3-5 minutes, disconnect tank and let engine die of fuel starvation, that way carb will remail immaulate clean inside and all internal parts well lubed for next start.

Happy Boating.
 

DeepCMark58A

Commander
Joined
Aug 17, 2015
Messages
2,337
My old mercury's I run the tank down to under 1/4 tank and add 6-8 ounces of 2 cycle oil and run the motor another 5 minutes or so. Fogged.
 
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