Author Topic: Won’t start when hot  (Read 585 times)

Online groily

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Re: Won’t start when hot
« Reply #15 on: 16.08. 2020 15:15 »
Berger could very well be dead right - I know diddly squat about those carbs, only ever having used Monoblocs on my own A. If there are loadsa sparks  . . . the carb has to be well in the frame.
Process of elimination, one thing only at a time, and I'm sure we'll know soon enough!

In the course of a long steamy day of riding in rain (am) humidity (all day) and high heat (pm) yesterday, with about 30 like-minded people who should know better but won't grow up, we had several failures which stretched our meagre support vehicle capacity. Ignition issues, mostly. I put it down to lack of use during the covid thing, despite normal amounts of fettling according to the owners. Just glad not to have been of their number myself, it's probably overdue  . . .
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Bill

Online chaterlea25

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Re: Won’t start when hot
« Reply #16 on: 16.08. 2020 17:59 »
Hi Adrian,
Do you have a heat insulating spacer fitted between the carb and cylinder head?
Next time stick your hand on the carb body and see how hot it is?

John
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Online AdrianJ

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Re: Won’t start when hot
« Reply #17 on: 16.08. 2020 19:17 »
John,
Yes I've got the spacer but I am not convinced by it for some reason. The carb supplier was incredibly insistent on me using it. Just made me suspicious. I'll check the spark and if That's OK I'll try putting the 276 back on. No dry weather till Wed and the bike's not going out in the rain  *smile*
Adrian
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'53 Plunger Flash, Steib S500.


Offline Triton Thrasher

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Re: Won’t start when hot
« Reply #18 on: 17.08. 2020 06:31 »
Have you already said you tried pressing the tickler?

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Online groily

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Re: Won’t start when hot
« Reply #19 on: 17.08. 2020 07:54 »
Think you have to pull a knob for cold starts on these TT, but like I say, I know diddly squat squared about them.
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Bill

Online AdrianJ

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Re: Won’t start when hot
« Reply #20 on: 17.08. 2020 10:56 »
That’s right. It’s the knob in top. Works a treat when it’s cold, first or second kick every time. Tried it on and off, with and without an open throttle when hot. As soon as I get some dry weather I’m going to check 5he spark.
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Online RichardL

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Re: Won’t start when hot
« Reply #21 on: 17.08. 2020 11:22 »
Slight tug on the leg: You need dry weather to check the spark?

Richard L.
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Plan on signing up for the world-wide 2020 DISTINGUISHED GENTLEMAN'S RIDEon September 27, 2020. This year it's a solo or pillion ride in dapper attire. Watch website at https://www.gentlemansride.com for details.


Online AdrianJ

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Re: Won’t start when hot
« Reply #22 on: 17.08. 2020 14:21 »
RichardL, Absolutely 😀 the bike doesn’t go out in the rain if I can avoid it.
I spent years riding 72 miles a day to and from work all year round. Now I can afford to I’ve given that up!
Adrian
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Online RichardL

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Re: Won’t start when hot
« Reply #23 on: 17.08. 2020 23:42 »
Uuh,

  • Bike in shed
  • Exhaust out the door
  • Start engine, run till hot (should get hot faster than into the wind)
  • Stop engine
  • plugs out
  • one plug in right-side plug cap
  • plug earth held against cylinder head
  • kick over
  • watch for spark
  • look outside
  • say, "Glad I'm dry."

OK, this is in jest. Don't be mad at me. I'm sure there must be quite logical reasons for not heating up in the shed.

Richard L.
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Online Greybeard

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Re: Won’t start when hot
« Reply #24 on: 18.08. 2020 09:13 »
Ooh, Richard. Bullet points. That's posh!
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Online AdrianJ

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Re: Won’t start when hot
« Reply #25 on: 19.08. 2020 11:44 »
Well, this is embarrassing.
Took the A10 out to warm up and test.
After 10 minutes riding, a tendency to stall and wouldn’t restart.
Took Rh plug out to check spark and the plug cap just fell off. Very loose, checked the spark - no problem and started on lh cylinder alone. Put plug back in and ensured cap was seated properly - started first kick. The spring clip inside the cap is weak. I’ll replace it.  I think it just expands a bit more as it warms up and gets looser.

Sorry to have bothered you all with such a trivial problem, but thanks very much for all your responses. I’ve learned a lot and laughed a bit (RichardL).

PS Richard - I live in a rural area but my garage is on a route across our valley used by some of our local lads and I don’t like to advertise what’s inside it.
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Online berger

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Re: Won’t start when hot
« Reply #26 on: 19.08. 2020 12:03 »
it seems like our twins are not in the same league as the singles, an old farmer always turned up at my dads when I was a young en on his C15 with a snapped plug, he used to say " it's orate it guz"
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Online RichardL

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Re: Won’t start when hot
« Reply #27 on: 19.08. 2020 13:19 »

PS Richard - I live in a rural area but my garage is on a route across our valley used by some of our local lads and I don’t like to advertise what’s inside it.

...aaand there's the logical reason.

Glad you've found the problem and can get back to enjoyable riding.

Richard L.
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Online Greybeard

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Re: Won’t start when hot
« Reply #28 on: 19.08. 2020 13:26 »
it seems like our twins are not in the same league as the singles, an old farmer always turned up at my dads when I was a young en on his C15 with a snapped plug, he used to say " it's orate it guz"
My wife and I lived in Suffolk for five years. The local accent and phrases, cracked us up. For instance, "Thass two coats coolder today, hint it!
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