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Aug 24th, 2023
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Joined: Jan 2016
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L - Learner Plates On
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OP
L - Learner Plates On
Joined: Jan 2016
Posts: 121 |
Hi I have a 1965 morgan plus 4 all of a sudden the choke needs to held to stay out, if you let it go it closes any help would be appreciated
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Joined: Aug 2010
Posts: 5,223 Likes: 123
Charter Member
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Charter Member
Joined: Aug 2010
Posts: 5,223 Likes: 123 |
Sounds like you have lost the clothes peg.
Paul
Costock, UK
2014 4/4 Rolls Royce Garnet Red
Disco 5
Teddy - 17h1 Irish Draught cross
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Joined: Dec 2011
Posts: 1,943
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Dec 2011
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Hi I have a 1965 morgan plus 4 all of a sudden the choke needs to held to stay out, if you let it go it closes any help would be appreciated My '63 +4 does not stay out either. I think it is designed that way. Another words pull choke (fuel enrichment)to start and release choke knob to run. If the choke (fuel enrichment jet) sticks open, put some petroleum jelly on the jet so it does not. There is a "Jet locking nut" that pushes against a cork washer. If the "Jet Locking Nut" is too tight the jet will stick. If it is too loose it will leak. Make sure after +4 is started that this jet returns to its normal position. It often sticks and the +4 runs too rich. Read Your manual on SU Carbs. There are a lot of little details that must be attended to properly for it to operate properly.
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Joined: Sep 2011
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Member of the Inner Circle
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Member of the Inner Circle
Joined: Sep 2011
Posts: 14,723 Likes: 149 |
Hi I have a 1965 morgan plus 4 all of a sudden the choke needs to held to stay out, if you let it go it closes any help would be appreciated Hang your man bag on it. 
Peter ![[Linked Image]](http://bradley.it/public_images/drive.jpg)
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Joined: Sep 2015
Posts: 145
L - Learner Plates On
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L - Learner Plates On
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Posts: 145 |
The jet locking nut is used to centralize the jet on the needle. I have found that when the choke was too hard to pull the jets needed to be re-centered, but I've never had it work the other way.
'61 +4 DHC
'70 4/4
'80 4/4 4seater
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Joined: Apr 2014
Posts: 5,181 Likes: 2
Charter Member
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Charter Member
Joined: Apr 2014
Posts: 5,181 Likes: 2 |
I have similar on the +8, should be pull and turn to stay on, but it only works on certain days of the week...strange.
.+8 Now gone for a 1800 4/4. Duratec in bright yellow.
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Joined: Dec 2011
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Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Dec 2011
Posts: 1,943 |
The jet locking nut is used to centralize the jet on the needle. I have found that when the choke was too hard to pull the jets needed to be re-centered, but I've never had it work the other way. Yes: That is true. The locking nut and cork washer assy. also seal the jet from leaking fuel. The trick is to center the jet and tighten the jet locking nut just enough to prevent fuel from leaking out but not so tight that the jet does not freely move up and down while choking. Not always easy to do. In the case of H-6 SU's the word is not "Choking" but "Fuel enrichment". Picky, Picky!
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Joined: Jan 2016
Posts: 121
L - Learner Plates On
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OP
L - Learner Plates On
Joined: Jan 2016
Posts: 121 |
I think I solved it the twist to the right was the way to go thanks for all the input
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Joined: Dec 2011
Posts: 1,943
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Dec 2011
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I think I solved it the twist to the right was the way to go thanks for all the input Ha! Ha!
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Joined: Jan 2012
Posts: 14,976 Likes: 1
Member of the Inner Circle
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Member of the Inner Circle
Joined: Jan 2012
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I recall some chokes were "twist" to stay out after pulling. Quarter turn or so.
Richard
1976 4/4 4 Seater
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