Sq4 stopping after oly a short run.
-
- Posts: 10
- Joined: Mon Oct 17, 2022 10:12 pm
- Contact:
Sq4 stopping after oly a short run.
Hi,
I thought that I would see if you guys have any suggestions. My Square4 will start really easily seems to run fine comes up to temp good oil pressure. New 6 volt coil, points, condenser, cap and leads etc. The carb was striped and rebuilt with new kit from SU. The vacum throttle valve was checked and cleaned. Fresh oil in the top.
It just stops. You have to wait for it to cool down. Then it starts up again. I'm a little bit lost on this one.
Has anyone had similar experience?
Cheers Mike
I thought that I would see if you guys have any suggestions. My Square4 will start really easily seems to run fine comes up to temp good oil pressure. New 6 volt coil, points, condenser, cap and leads etc. The carb was striped and rebuilt with new kit from SU. The vacum throttle valve was checked and cleaned. Fresh oil in the top.
It just stops. You have to wait for it to cool down. Then it starts up again. I'm a little bit lost on this one.
Has anyone had similar experience?
Cheers Mike
Re: Sq4 stopping after oly a short run.
Check for debris clogging up your petrol tap. Especially the filter gauze inside of the petrol tank. That is just one of many possibilities…
1951 Ariel Square Four MKI
1954 Ariel NH Red Hunter
1929 BSA Sloper
1946 BSA B31 (project)
1954 BSA C11G
1960 Harley Sportster XLH
1951 Harley WL 45
1954 Ariel NH Red Hunter
1929 BSA Sloper
1946 BSA B31 (project)
1954 BSA C11G
1960 Harley Sportster XLH
1951 Harley WL 45
-
- Holder of a Silver Anorak
- Posts: 968
- Joined: Thu Oct 08, 2015 12:56 am
- Contact:
Re: Sq4 stopping after oly a short run.
Lots of questions:
Did you replace the electrics in an attempt to fix the problem?
Does it cut out at a steady throttle opening or when slowing down or what?
Does it splutter or does it quit completely as if you'd turned the ignition off?
How much oil did you put in the top of the SU?
My first thought for what it's worth is that the coil is breaking down - have you checked
to see if there is a spark when it's cut out?
Finally, welcome to the forum.
Did you replace the electrics in an attempt to fix the problem?
Does it cut out at a steady throttle opening or when slowing down or what?
Does it splutter or does it quit completely as if you'd turned the ignition off?
How much oil did you put in the top of the SU?
My first thought for what it's worth is that the coil is breaking down - have you checked
to see if there is a spark when it's cut out?
Finally, welcome to the forum.
-
- Holder of a Waxed Cotton Anorak
- Posts: 339
- Joined: Fri Sep 28, 2018 8:35 am
- Contact:
Re: Sq4 stopping after oly a short run.
When it stops, have you tried removing the petrol tank filler cap?
Sometimes, if there is no/insufficient venting, a partial vacuum occurs which stops the fuel flowing.
Sometimes, if there is no/insufficient venting, a partial vacuum occurs which stops the fuel flowing.
- paul.jameson
- Holder of a Golden Anorak
- Posts: 2950
- Joined: Wed Oct 12, 2011 3:04 pm
- Location: Herefordshire
- Contact:
Re: Sq4 stopping after oly a short run.
I have had similar issues, although with misfiring rather than cutting out completely, due to problems in the low tension part of the ignition system. Check that the distributor baseplate isn't cracked and that the stud coming out of the side of the distributor is still soldered into the strap which runs round the inside of the distributor. Check also the connection of the wire to the terminal which screws onto the stud externally.
Did you replace the rotor arm?
Did you replace the rotor arm?
Paul Jameson
35 LG (project), 37 RH500, 52 ex ISDT KHA, 54 KH(A), 75 Healey 1000/4.
Former Machine Registrar & Archivist, General Secretary and Single Spares Organiser (over a 25 year period).
Now Archivist (but not Machine Registrar), Gauges and Clocks Spares Organiser.
35 LG (project), 37 RH500, 52 ex ISDT KHA, 54 KH(A), 75 Healey 1000/4.
Former Machine Registrar & Archivist, General Secretary and Single Spares Organiser (over a 25 year period).
Now Archivist (but not Machine Registrar), Gauges and Clocks Spares Organiser.
-
- Posts: 10
- Joined: Mon Oct 17, 2022 10:12 pm
- Contact:
Re: Sq4 stopping after oly a short run.
Hi many thanks for all your suggestions.
I haven't been able to drive as I had a brain tumor a few years back. My wife tells me it cuts out when you're throttling back. I.e Coming into a round about.
I'll check the petrol tank vacuum. That could be a go. . I did think about the coil breaking down, hence the new one. But alas no. Yes I replaced the rotor, cap, Leeds, plugs. Even bought another distributor and dynamo had it check for a spare if need be. I will check the wiring in the distributor again though.
I just seems really strange. Last year it worked really well. I was in the side car
I haven't been able to drive as I had a brain tumor a few years back. My wife tells me it cuts out when you're throttling back. I.e Coming into a round about.
I'll check the petrol tank vacuum. That could be a go. . I did think about the coil breaking down, hence the new one. But alas no. Yes I replaced the rotor, cap, Leeds, plugs. Even bought another distributor and dynamo had it check for a spare if need be. I will check the wiring in the distributor again though.
I just seems really strange. Last year it worked really well. I was in the side car
-
- Holder of a Silver Anorak
- Posts: 968
- Joined: Thu Oct 08, 2015 12:56 am
- Contact:
Re: Sq4 stopping after oly a short run.
What a lovely sidecar outfit. The front brake is more than a bit special too.
Cutting out like that suggests to me that there is a carburettor issue - especially
if it's been standing for a while with fuel in it and especially too if the fuel is
the E5 or E10 variety.
Cutting out like that suggests to me that there is a carburettor issue - especially
if it's been standing for a while with fuel in it and especially too if the fuel is
the E5 or E10 variety.
-
- Holder of a Nylon Anorak
- Posts: 276
- Joined: Tue Nov 01, 2011 8:18 am
- Location: Erlangen, Germany
- Contact:
Re: Sq4 stopping after oly a short run.
The sidecar seems to be a Steib S 500 (or similar typ). Very nice!
-
- Posts: 10
- Joined: Mon Oct 17, 2022 10:12 pm
- Contact:
Re: Sq4 stopping after oly a short run.
Hi yes,
The sidecar is a Stieb.very compatible...... when th bike goes!
The sidecar is a Stieb.very compatible...... when th bike goes!
-
- Holder of a Waxed Cotton Anorak
- Posts: 339
- Joined: Fri Sep 28, 2018 8:35 am
- Contact:
Re: Sq4 stopping after oly a short run.
The Rodark panniers blend-in nicely.
Also...that front brake...wow!! That should deal with the extra weight of the Steib!
Also...that front brake...wow!! That should deal with the extra weight of the Steib!
Who is online
Users browsing this forum: Bing [Bot], Majestic-12 [Bot] and 22 guests