Solex H30/31 problems

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CliveG
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Solex H30/31 problems

Post by CliveG »

Hi everyone,
Picked up my first Split only broke down 3 times on the way home and can't start at all how. It sometimes starts but stalls within a minute or two, it even did this while hot an hour or two into the drive home a strong smell of fuel everytime. I have bought a rebuild kit but this Solex H30/31 carb is a bit of a mistery what is this lever for and should if be floppy, is there supposed to be a spring here?

Thanks for your help.
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BJ1
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Re: Solex H30/31 problems

Post by BJ1 »

Looks like a stock H30/31 - the lever is fine. Most likely the needle valve in the float camber is not closing properly, possible due to crud in the fuel lines. Renew the fuel hoses, check the needle valve and remove and clean the idle jet which could also be blocked.

And get rid of that useless pancake air filter. Put a proper original filter back on the bus with a hose from that to the case oil filler otherwise you will always have oil leaks due to high case pressure.
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DOUGAL
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Re: Solex H30/31 problems

Post by DOUGAL »

You also have an aftermarket fuel pump.
Check the fuel pressure to the carburettor. This might be too high.
Can't remember but I think it should be 3 PSI.
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BJ1
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Re: Solex H30/31 problems

Post by BJ1 »

DOUGAL wrote: Sat Oct 17, 2020 10:10 am You also have an aftermarket fuel pump.
Check the fuel pressure to the carburettor. This might be too high.
Can't remember but I think it should be 3 PSI.
That pump is fine for H30/31 carb. You only need lower pressure for Weber carbs like ICTs.
1966 SO42 Westy in Velvet Green - on the road at last!
1967 Devon from Devon still in Devon
1967 Sundial from Idaho
1971 Westfalia from LA
1971 patina Delux from Montana now living in Germany
1972 Devon now owned by No 1 son!
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DOUGAL
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Re: Solex H30/31 problems

Post by DOUGAL »

BJ1 wrote: Sat Oct 24, 2020 1:05 pm
DOUGAL wrote: Sat Oct 17, 2020 10:10 am You also have an aftermarket fuel pump.
Check the fuel pressure to the carburettor. This might be too high.
Can't remember but I think it should be 3 PSI.
That pump is fine for H30/31 carb. You only need lower pressure for Weber carbs like ICTs.
I always thought it had to be 3PSI. Good to know that those pumps are ok.

Cheers,
Gertjan
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