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TEA 20-85

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Brian McDonald

04-02-2002 19:41:58




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looking for some engine specks,and any advice on why my tractor idle's well but backfires with intermitent power loss on movement.




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dan soos

02-16-2004 17:07:31




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 Re: TEA 20-85 in reply to Brian McDonald, 04-02-2002 19:41:58  
i don't have that problem, but i can't keep a charge. i can ask my father whom is a farm machiner mechanic, has been for 25 years, he specalizes in Massey Ferguson's.
email me the serial # and i'll look for the problem.



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Bill MacPherson

04-15-2002 19:52:15




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 Re: TEA 20-85 in reply to Brian McDonald, 04-02-2002 19:41:58  
Welcome to Fergie land , we have a 1952 model that is still churning away ---50 years on the same farm , still as good as gold , need help email me ---Bill



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NCtim

04-03-2002 13:51:31




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 Re: TEA 20-85 in reply to Brian McDonald, 04-02-2002 19:41:58  
Hi Brian,

What spec's do you need? I've gotten a pretty good reproduction of the original shop manual for a TEA. Look at the sites listed to the left and you can get it for around $60.00 US.

Your timing sounds like it's too far advanced. On later 20-85's the static timing shouldn't be more than 10 degrees BTC. The distributor starts to advance at 200-300 rpm so even at idle you've got a significant amount of advance happening.

Hope you don't have a burned valve, which is another likely cause. Sometimes a blown head gasket will do the same thing, but not in these low compression engines, I don't think.

NCtim

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bruce

04-06-2002 04:55:22




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 Re: Re: TEA 20-85 in reply to NCtim, 04-03-2002 13:51:31  
had something like that happen once we revierst the last to cylinders in the firing order . had a good laugh after ,but found it confusing at the time.



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Brian McDonald

04-07-2002 07:44:52




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 Re: Re: Re: TEA 20-85 in reply to bruce, 04-06-2002 04:55:22  
NCtim,would you have the corect firing order for the distibutor on my TEA20-85? the cap does not have the order on it ,and I,m thinking that might be why I,m having the back fire,When I took off the hose from the air filter to the carb everytime it backfired there was blow back out the carb.not alot and the engine kept running Ive changed the plugs,checked the gap on them and the points in the distributer,changed the gas ,checked the compression .I am going to change the cap and rotor next ,any advice would be appreciated..... Brian McDonald

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NCtim

04-08-2002 12:16:53




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 Re: Re: Re: Re: TEA 20-85 in reply to Brian McDonald, 04-07-2002 07:44:52  
Hi Brian,

It's 1-3-4-2 and it's counter clockwise rotating.



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