PDA

View Full Version : TBI engine, can you fog the cylinders?


ac505
09-14-2013, 06:11 AM
Still learning the engine in my '00 xstar. My old boat had a GT40, it wa a no no to fog the cylinders through the intake manifold, instead fogging each cylinder individually was the order of the day.

Can I fog the Throttle body directly on the TBI engine, would doing so have an affect on any of the sensors such as the TPS sensor?

André
09-14-2013, 06:27 AM
Yes,no problems.:)

CantRepeat
09-14-2013, 09:54 AM
Who told you not to fog your 00? I assume it was a TBI motor.

What I have found in my reading is this:

Wet intake types = fog through intake.

Dry intake types = spark plug holes.

I do not understand the reasoning behind it but that's what seems to be the rule of thumb.

mikeg205
09-14-2013, 10:04 AM
Who told you not to fog your 00? I assume it was a TBI motor.

What I have found in my reading is this:

Wet intake types = fog through intake.

Dry intake types = spark plug holes.

I do not understand the reasoning behind it but that's what seems to be the rule of thumb.


This is what I do on my TBI... thru TBI intake

Bouyhead
09-14-2013, 10:50 AM
I do both. I use a spray bottle with Marvel Mystery Oil and go thru the TBI then do each cylinder to satisfy my OCD.

mikeg205
09-14-2013, 11:06 AM
I do both. I use a spray bottle with Marvel Mystery Oil and go thru the TBI then do each cylinder to satisfy my OCD.

Oh Great... your such and enabler Bouy....... ;)

j.mccreight@hotmail.com
09-14-2013, 11:12 AM
This is what I do on my TBI... thru TBI intake

What is this "fogging" you speak of?:);)

mikeg205
09-14-2013, 11:16 AM
What is this "fogging" you speak of?:);)

too funny...


http://www.freesmileys.org/smileys/smiley-laughing025.gif (http://www.freesmileys.org/smileys.php)http://www.freesmileys.org/smileys/smiley-laughing025.gif (http://www.freesmileys.org/smileys.php)http://www.freesmileys.org/smileys/smiley-laughing025.gif (http://www.freesmileys.org/smileys.php)http://www.freesmileys.org/smileys/smiley-laughing025.gif (http://www.freesmileys.org/smileys.php)

packman312
09-14-2013, 05:29 PM
Had one service guy say you dont need to fog these newer MC engines. Make any sense to you guys?

JimN
09-14-2013, 06:12 PM
Still learning the engine in my '00 xstar. My old boat had a GT40, it wa a no no to fog the cylinders through the intake manifold, instead fogging each cylinder individually was the order of the day.

Can I fog the Throttle body directly on the TBI engine, would doing so have an affect on any of the sensors such as the TPS sensor?

The TPS isn't in the intake air stream, it's at the end of the rod used for mounting the throttle plate. The other sensors aren't affected by fogging oil, either.

Since you're familiar with fogging each cylinder, you can do it the same way, but the spark plugs are a lot easier to remove on this engine.

thatsmrmastercraft
09-14-2013, 06:32 PM
Had one service guy say you dont need to fog these newer MC engines. Make any sense to you guys?

Only fog the engine if you don't want any corrosion to occur during lay up. Whoever told you that must have been a little "foggy". :rolleyes:

mikeg205
09-14-2013, 06:37 PM
Only fog the engine if you don't want any corrosion to occur during lay up. Whoever told you that must have been a little "foggy". :rolleyes:

Not fogging seems strange.... especially with today's fuels - I found this statement a bit strange.

AlbertaSurfer
09-14-2013, 07:58 PM
I always thought fogging was a 2 stroke engines thing. Is fogging a 4 stroke really that necessary?

thatsmrmastercraft
09-14-2013, 08:08 PM
I always thought fogging was a 2 stroke engines thing. Is fogging a 4 stroke really that necessary?

Fogging oil is sticky and adheres to the cylinder walls to prevent corrosion. This is especially important for us guys up North where the lay-up is longer. Just a little corrosion on the cylinder walls becomes a problem when the piston rings are scraping up and down.

mikeg205
09-14-2013, 08:45 PM
Fogging oil is sticky and adheres to the cylinder walls to prevent corrosion. This is especially important for us guys up North where the lay-up is longer. Just a little corrosion on the cylinder walls becomes a problem when the piston rings are scraping up and down.

10 months of snow last season peter?