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Old 12-03-17, 05:45 PM   #1
splitter
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Default Lister L governor

I'm having problems with a Lister L, I can't get it to govern any sence. If I run it rich it's OK but as I lean the mixture down it runs away. I've checked for air leaks and the governor that's all ok. Have any of you guys got any ideas.


Thanks in advance Paul.
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Old 12-03-17, 07:22 PM   #2
danthetangye
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How rich actually? To the point of black smoke? Check the gaskets on the carb and how well the butterfly or throttle slide is sealing. It could also be drawing air past the inlet valve guide. It should run with the choke partially closed under no load. Some video would help us to see what's going on.

Dan
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Old 12-03-17, 07:30 PM   #3
martinpaff
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Quote:
Originally Posted by splitter View Post
I've checked for air leaks and the governor that's all ok...
Clearly it's not OK. You are controlling the speed of the engine by pouring fuel into it. As soon as you lean the mixture to something near right it runs away, so the governor is not working.

(As I have said repeatedly) If an engine runs too fast it is getting too much fuel and too much air, but probably in the correct(-ish) proportions.

In your case you provide the correct proportions by leaning the mixture, so air is getting in. It is either leaking in somewhere (as Dan has suggested) or the governor is not closing the slide fully.

What happens if you disconnect the governor and control the slide by hand? Can you slow the engine down?

MP
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Old 12-03-17, 08:22 PM   #4
single flywheel
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Smile Lister l govenor

Hello my sons l when we bought it would no slow down we removed the governor housing to find the not only was the casing cracked but the mechanism was not sliding on the cam shaft we got casing welded and made sure every thing was moving as it should and the l no behaves as it should.
Mike.
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Old 12-03-17, 10:12 PM   #5
splitter
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Well I dont know! the governor sleeve is free on the cam shaft the weights are free the thottle slider is moving fine. I've even tried different lenth governor rods, I've had the choke wheel in different positions. If it's over fueling "ie" loads of black smoke, it runs real nice.
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Old 12-03-17, 10:36 PM   #6
danthetangye
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Has it got the correct tension governor spring fitted?

Dan
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Old 12-03-17, 10:45 PM   #7
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Yes but I've tried different springs, and it's still the same!
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Old 13-03-17, 01:45 PM   #8
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Quote:
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Yes but I've tried different springs, and it's still the same!
That's not what I asked - has it got the CORRECT spring, with the right length adjuster screw? With no spring fitted, or the spring removed whilst running the governor should shut the engine down.

There is obviously something wrong, it's just a matter of stepping through it one component at a time until you find it.

Dan
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Old 13-03-17, 02:14 PM   #9
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If you weren't so far away I'd say bring it up to mine and I'd take a look at it. My gut feeling is that the slide is not closing as it should !
Good luck !😉😆
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Old 13-03-17, 05:57 PM   #10
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throttle rod has been shortened.Had this with my L
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