SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: Kyle700 on June 21, 2013, 05:33:19 PM
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I was using a car carb, finally got a marine version. Now, the old carb had a vacuum line attached coming from the distributor, the marine carb doesn't have the metal tube to attach the vacuum line to...Do I remove the (metal) tube from the old carb and install it on the "new" one? It is located less than an inch above the choke vacuum line..
The carb I have now is used, from a boat with twin 350's. My engine is an old (73) 350. Do I need that vacuum tube from the dist attached for timing purposes?
Also the old carb had a connection/tube on the lower front that had a hose that connected to the port side valve cover, new carb does not have such tube..
Thanks
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The one to the Dist. is for your vacuum advance and the one to the valve cover is for a PCV valve.
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Send some pics
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Pics are your friend:)
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You don't need a vacuum advance in a marine application. Just make sure the mechanical advance gets you 20 degrees or so, forget the vacuum advance, and set the distributor so you're at 36 degrees at 3000 RPMs.
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I have two pics to attach but they are apparently too big to post..........
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#1 is where the vacuum from the dist connected (which may not have been right) #2 is where the PVC connected. "New" carb pic to follow
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New carb