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Restoration & Repair Tips Board

Century LP Gas regulator rebuild kits-

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Hugh McKinney

11-06-2009 10:28:12

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Anybody out there who knows anything about rebuild kits for these 1950's Century regulators for LP Gas tractors? I have a 1955 model John Deere 70, and the regulators that they sell today don't seem to work well with an uneven-firing two-cylinder engine like these old Poppin' Johnnies. Does anybody even know how to trouble-shoot a propane induction problem? I bought a new regulator from an aftermarket company, but the engine is very hard to start sometimes and frequently goes dead for no apparent reason. All the ignition stuff is new. Thank you for much in advance.

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Hugh McKinney

11-08-2009 18:30:39

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 Re: Century LP Gas regulator rebuild kits- in reply to Hugh McKinney, 11-06-2009 10:28:12  
Thanks Ole Shovel. I looked up my current Impco regulator and found out that it is a model J, which comes with a secondary spring that gives the maximum capacity vacuum for up to 100 horsepower. Since my John Deere '70' only has 46 horsepower, I am thinking that I should order the optional spring that is for only one third as much vacuum. What do you think?

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Jon Hagen

11-09-2009 18:41:50

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 Re: Century LP Gas regulator rebuild kits- in reply to Hugh McKinney, 11-08-2009 18:30:39  
I have some experience with IMPCO vaporizer / regulators, as I have them installed on all my propane powered equipment.
The blue secondary spring is for air valve type carbs while the orange spring is for venturi type carbs. I suspect your JD Has a century venturi type carb and needs the orange spring in an IMPCO regulator. My stuff all has the larger model E regulators, and that was the spring colors for that model. Yours likely would use the same.

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Ole Shovel

11-07-2009 14:26:18

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 Re: Century LP Gas regulator rebuild kits- in reply to Hugh McKinney, 11-06-2009 10:28:12  
Other LP regulators should work too. Sounds like you have other problems or more ignition electrical problems too. If your local LP dealer can't get kits or parts or fix the regulator vaporizer for you there are several vendors listed in some JD hobby magazines. New Century regulators, filters and parts are still made today also try

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