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Case Tractors Discussion Forum

Questions on DC4 carb and mag ?????

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Alberta Mike

07-19-2006 04:46:07

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Took apart a Zenith carb from an early 40's model DC4 yesterday and this carb has two venturi's in the carb throat. The larger one is the standard type that drops into the carb casting, while the smaller (inner) one is supported inside the larger (outer) venturi. It seems to be suspended there on a pair of arms that radiate out from the inner venturi. The inner one seems to "hang" in a couple of slots in the outer venturi. The inner one is not fastened tight when in position, it just sits in these slots and appears as if it can move a bit which I'm sure is incorrect. Should this inner venturi be stable when in place? I was thinking of trying JB weld to secure it since those venturi castings are pot metal. The outer slots are worn a bit from the movement. Can anyone explain to me how this was originally kept in place in that assembly?

Also, are magneto parts for this "Case" magneto available? Any parts source would be appreciated.

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C. Amick

07-20-2006 09:37:21

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 Re: Questions on DC4 carb and mag ????? in reply to Alberta Mike, 07-19-2006 04:46:07  
Try Bill Wilson in Montana 618-538-5427 regarding carb and magneto parts.

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07-19-2006 12:56:04

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 Re: Questions on DC4 carb and mag ????? in reply to Alberta Mike, 07-19-2006 04:46:07  
I have seen the venturis like you mention, as for mag parts- very little nos and pricey

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Alberta Mike

07-19-2006 15:34:55

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 Re: Questions on DC4 carb and mag ????? in reply to dboll, 07-19-2006 12:56:04  
Thanks, do you remember if the inner venturi was snug and secure when in place? Don't know why or how this one came loose.

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