Ariel square 4 misfire

Singles, twins and fours.
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simon.holyfield
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Re: Ariel square 4 misfire

Post by simon.holyfield »

paul.jameson wrote: Mon Nov 20, 2023 8:34 pm Knowing your engine Rob, and knowing that it now smokes a little, I would go straight to WR9BC or WR9AC.
Interesting you are using resistor plugs. Reckon I should change?
cheers

Simes

'51 Square Four,
'58 Huntmaster,
'42 W/NG,
'30 Model A
https://ariel-square-four.blogspot.com
nevhunter
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Re: Ariel square 4 misfire

Post by nevhunter »

As a long time rebuilder of magnetos. I've always been of the opinion that resistor (Carbon) Leads and "R" plugs are not advised as the higher resistance will promote arcing/shorting of the secondary HT winding as it can if a plug lead comes off which can be instant death to a magneto with no "safety Gap". Nev
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paul.jameson
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Re: Ariel square 4 misfire

Post by paul.jameson »

My 1936 4G and Rob's 1948 4G have now both been converted to electronic ignition, hence the resistor plugs. As Nev says, you should never have any form of suppression when using a magneto.
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.
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simon.holyfield
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Re: Ariel square 4 misfire

Post by simon.holyfield »

simon.holyfield wrote: Mon Nov 20, 2023 10:46 pm
paul.jameson wrote: Mon Nov 20, 2023 8:34 pm Knowing your engine Rob, and knowing that it now smokes a little, I would go straight to WR9BC or WR9AC.
Interesting you are using resistor plugs. Reckon I should change?
Question applies only to my coil ignition Mk1; no resistors on the magneto equipped bikes...
cheers

Simes

'51 Square Four,
'58 Huntmaster,
'42 W/NG,
'30 Model A
https://ariel-square-four.blogspot.com
Colinbrindley
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Re: Ariel square 4 misfire

Post by Colinbrindley »

Thankyou for the info.
1947 Square four ironhead.1943 BSA WM20.1948 Brockhouse Corgi in bits. A very patient MRS.
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