YKG2S2 aussie Mk1 1275 cooper S. Having problems starting when cold and not started for a while. Having to pump throttle for a long time to get started. Once warm no problems. Any ideas? Probably something v. simple that I'm not aware of.
Cold Starting
Started by
Whizzbang
, Mar 26 2026 10:59 AM
4 replies to this topic
#1
Whizzbang
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Stage One Kit Fitted
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Posted 26 March 2026 - 10:59 AM
#2
timmy850
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Up Into Fourth
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Posted 26 March 2026 - 11:17 AM
What carb does it have?
What distributor/coil/plugs?
What’s the battery voltage when cranking it cold?
What distributor/coil/plugs?
What’s the battery voltage when cranking it cold?
#3
Lplus
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One Carb Or Two?
- Location: Hampshire
Posted 26 March 2026 - 12:32 PM
YKG2S2 aussie Mk1 1275 cooper S. Having problems starting when cold and not started for a while. Having to pump throttle for a long time to get started. Once warm no problems. Any ideas? Probably something v. simple that I'm not aware of.
Unless you have a weber or equivalent carb, pumping the throttle will not help at all. The choke system is necessary for rich mixture at starting.
#4
Whizzbang
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Posted 29 March 2026 - 09:04 AM
Thanks Lplus and timmy850. I knew it would be easy and should have noticed the fault. Choke knob was jamming and not
fully extending. New one on order.
#5
Ethel
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Posted 29 March 2026 - 11:07 AM
Might be worth checking your engine earth strap. If it's not too good the choke & accelerator cables can get used as supplements
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