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Minneapolis Moline Tractors Discussion Forum
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Re: fired once on ether.. This is odd

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Curt Cooke

01-17-2013 06:49:09
64.186.50.66



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This going to sound stupid but when I've struggled with things like this I start switching parts. I have several LPG tractors and a lot of parts around. If you can, put a gasoline carb on it and put some fuel to it, see if you can positively identify carburetion as the problem. Your 930 is likely Ensign and not a particularly good candidate for a swap for LP. But if you have anything else LPG that would be easier, swap that. I've been stymied to the point of switching carbs and mags and distributors. We've got to eliminate the potential problems. Do you have good vacuum? That is, if you roll the engine and put your hand over the intake on the carb., does it suck hard on your hand?

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R Wyler

01-17-2013 06:55:01
70.137.10.157



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 Re: fired once on ether.. This is odd in reply to Curt Cooke, 01-17-2013 06:49:09  
Yes the 930 has an Ensign carb and Beam 120A regulator. Actually as well as that 930 starts I was almost thinking about getting another carb like that and a reg compatible and going that way. I will check out the vacume like you said. I don't have anything else handy to hook up carb wise no other lp or gas carbs around that would fit. I am going to try a different condensor. I do think it is odd that I cannot smell lpg in the cyls when it is getting to the carb and then it has fired but only a time or two. I will try the elimination process more.

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Howard H.

01-17-2013 10:32:43
156.110.78.2



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 Re: fired once on ether.. This is odd in reply to R Wyler, 01-17-2013 06:55:01  

If you are getting regular blue spark, then I think it must be in the fuel.

While turning it over, I used to short each plug with a screwdriver to make sure each plug was getting fire and getting it evenly... Or just pull the wire and stick a screwdriver in the end and let it short out to ground. Sometimes easier to see in low light.

I've seen a lot of weird "low-probability" things like stripped drive gear on a distributor, stripped rotor, etc, that let the rotor jerk around some - distributing some fire - but not that would let the engine run.

BUT, if it sounds smooth for those 4 seconds, I'm guessing all your electrical and mechanical is all good and you just need to figure out the fuel issue...

Could you post a pic of your regulator??

Howard

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R Wyler

01-17-2013 16:55:49
70.137.10.157



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 Re: fired once on ether.. This is odd in reply to Howard H., 01-17-2013 10:32:43  
I know that #1 and I think #6 are firing. I can check the others easier and faster with an extra hand there to crank it over. Today I set it to as close to 25 BTDC as I could without it being marked past 28 1/2 I guess it is. I turned the dist until #1 plug sparked. Here is a pics of the regulator installed.  photo dcp_4157.jpg

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