Choke Housing Vented?

M

myoldboat2

Petty Officer 1st Class
Joined
Jun 3, 2007
Messages
300
1974 Merc 140 s/n 390xxxx

My choke has the cover plate with a bimetallic coil on the inside. It has the copper riser tube that lets exhaust into the choke housing.

Is the choke housing supposed to be vented? If so, where is the vent? I think mine might be plugged.


original thread here: http://forums.iboats.com/showthread.php?t=351404
(possibly two problems; choke acting weird, engine starting poorly; might be same problem)

Thanks!
 
K

KJSmitty

Petty Officer 2nd Class
Joined
Aug 9, 2008
Messages
179
Re: Choke Housing Vented?

I have no idea of your exact setup yet the chock housing isn't "vented" yet rather should have a small vacuum source that pulls the hot air into it. The tube/riser that comes up from your exhaust is not typically pulling exhaust gases - rather just a hot air source etc.

Look for a small vacuum hole within the housing.

Cheers
 
cr2k

cr2k

Captain
Joined
Mar 19, 2009
Messages
3,730
Re: Choke Housing Vented?

The "vent" is in the part that bolts to the carb. There is a gasket and one or 2 screws that hold the choke housing to the carb body. The carb vacuum pulls the heated air through the housing and past the spring.
 
M

myoldboat2

Petty Officer 1st Class
Joined
Jun 3, 2007
Messages
300
Re: Choke Housing Vented?

Thanks, found it, the lower left hole. Looks like my gasket was shot.

carb4.jpg
 
You must log in or register to reply here.
Top