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  #1  
Old 12-26-2004, 10:10 PM
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Location: Western Washington
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Question Location of internal Carburetor Screen for 250

FastLane (and other vendors) sell this for the 1971 250, yet I have been unable to find it on the carbs I'm working on. I suspected the screen at the fuel inlet, but it is a 90 deg open flow. Anyone have any ideas?
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1970 280S M130 engine- good runner
1971 250 M130 engine- #2 rod bearing, gone
1971 280SE (blown engine,parts car)
1977 German 280S W116-only 33 years old
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Old 12-27-2004, 09:03 AM
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It's behind the male fitting to which the female fitting on the fuel line attatches. You unscrew it from the carb body with a 17mm wrench.

I believe the filters were discontinued at some point, though, so don't be surprised if they're not there.
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Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
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  #3  
Old 12-27-2004, 03:08 PM
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Join Date: Aug 2004
Location: Western Washington
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Thanks, Chuck

I'm rebuilding the carbs, but I think that my original problem stems from the fact the the 2 vacuum lines at the base of the 3 way valve have be connected exactly as pictured in the diagram. PSFred first mentioned to verify the correct hook up , but that helpful piece of information was somehow 'lost'.

What I hate to admit is as I observed the timing scale scale change to more degrees, it was actually retarding the Timing, not advancing. I believe I have a handle on this, but I am rebuilding the carbs, they need it.
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1970 280S M130 engine- good runner
1971 250 M130 engine- #2 rod bearing, gone
1971 280SE (blown engine,parts car)
1977 German 280S W116-only 33 years old
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  #4  
Old 12-28-2004, 11:40 AM
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Join Date: Mar 2004
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My 69 230/8 with Zeniths does not have any filter screens at the carbs. So they must have been discontinued sometime earlier than 69. In fact, I have never seen screens on any Zeniths, just a filter at the pump. Old models had a screen in the pump and later models have a separate cartridge filter after the pump on the line to the carbs.

230/8
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  #5  
Old 12-28-2004, 12:10 PM
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Join Date: Apr 2000
Location: Falls Church, VA
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I had a pair of carbs of uncertain origin that did have them. They had the idle solenoids, so they were (probably) post-mid-1970. Go figure.

I also encountered them on a 1969 280S.

Certainly easy enough to check.
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Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
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