These are thermostatically controlled chokes designed to assist in cold starting.
The "pipe" or tubing draws heat that is exchanged from the manifold, to "pull off" the choke when the motor warms up.
Depending on your locale, ambient operating temperatures and warm-up routine you may find you can start and operate your boat without one or both of the chokes.
I've operated my QuadraJet Chevy with and without the choke and frankly don't notice much difference.
lee
________________________________
From: omc-boats-bounces@... [mailto:omc-boats-bounces@...ultimate.com] On Behalf Of Nexi
Sent: Tuesday, August 18, 2009 10:53 PM
To: omc-boats@...
Subject: [OMC-Boats] Question about carbs
I've got a question about the carbs on a 1967 Sportsman 120. I've linked to 2 pictures below. The first picture shows a black cover on the carb and a pipe coming out from the left side which goes down into the engine. The second picture is missing the cover as well as the pipe. It looks like someone broke the threaded piece on the side of the second pic. I did look around for someplace that a second pipe would go and didn't see anything. I'm just wondering if this is normal or if both the cover and pipe are supposed to be on the carb. Can I run the boat without them?
On a side note... I do have a service manual on the way.
http://i30.tinypic.com/20u1vli.jpg
http://i30.tinypic.com/vintc7.jpg
Received on Wednesday, 19 August 2009
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