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BigAl331
07-17-2009, 01:14 PM
I was looking over my '82 Johnson 150 and found an open vacuum port directly below the bottom carb. I downloaded a manual but I can't find anything about the vacuum hoses. Does anyone know what goes on this port? Is it needed or can I cap it off?
tsubaki
07-17-2009, 01:42 PM
The one below the carbs goes to the air damper cover.
Look on the back of it and you will see another nipple.
tsubaki
07-17-2009, 01:45 PM
Or are you running without the cover installed?
BigAl331
07-17-2009, 04:31 PM
The one below the carbs goes to the air damper cover.
Look on the back of it and you will see another nipple.

Or are you running without the cover installed?

Not sure what you are talking about. Where is the damper you are talking about?
JeanF
07-17-2009, 05:25 PM
Al,

Can you show us a picture of it ? :pic:
tsubaki
07-17-2009, 06:17 PM
The carburetor intake.
The flame arrester.
The big cover that takes up all the space on the front of the engine.
Hell, I can't *****, I don't even have a picture of mine.
tsubaki
07-17-2009, 06:30 PM
I just tried to take a picture of mine and you couldn't make out anything useful as to the routing.
tsubaki
07-17-2009, 07:03 PM
It's less than 4" from the nipple your taking about.
BigAl331
07-17-2009, 08:23 PM
Al,

Can you show us a picture of it ? :pic:
I can try tomorrow.
BigAl331
07-17-2009, 08:26 PM
The carburetor intake.
The flame arrester.
The big cover that takes up all the space on the front of the engine.
Hell, I can't *****, I don't even have a picture of mine.

There is nothing in the carb cover that moves so why need vacuum.

I plugged it with piece of hose and screw.
phatdaddy
07-17-2009, 09:44 PM
the cover he is talking about is the plastic you have to take off to look down the throats of the carbs.
i think the hose takes excess fuel in the intake manifold and returns it upstream of the carbs to be sucked back in the engine


i think?
tsubaki
07-18-2009, 04:47 AM
Correct phat.
That year air intake cover should be aluminum.
On the engines we had, where the cover was missing, we made sure there was a hose (a couple of inches longer than from the nipple to the front of the carbs) attached so as to either remember what it was or to keep creatures out. All of them always vented fuel.
Here is one off a 50 horse.
http://i175.photobucket.com/albums/w159/tsubaki3/johnson012.jpg
BigAl331
07-18-2009, 02:04 PM
Found it! It was on my lower carb metal cover.

Thanks.