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Phil 850
 Post subject: Fumey cabin
PostPosted: Sun Sep 10, 2017 8:01 pm 
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My mini has always been a bit fumey in the cabin.
Went for a run from Emu Plains to Berry and back today with my daughter as navigator.
She complained of the fuel smell.
I have checked everything previously and never found a fuel leak anywhere.
We averaged about 15klm per litre including cruising at 100 to 110 on the freeway to/from Mittagong and then a bit more sedately 8) through kangaroo valley.

1100S. 1-3/4" SU. Maniflow LCB. RC40 twin box side exit exhaust.

Any ideas :(

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Last edited by Phil 850 on Mon Sep 11, 2017 8:22 pm, edited 1 time in total.

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Matt I
 Post subject: Re: Fumey cabin
PostPosted: Sun Sep 10, 2017 8:55 pm 
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Phil 850 wrote:
1100S. 1-3/4" SU. Maniflow LCB. RC40 ten box side exit exhaust.


That ten box exhaust must be restrictive :roll:

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Tim I
 Post subject: Re: Fumey cabin
PostPosted: Sun Sep 10, 2017 9:14 pm 
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I think I'd be having a close look around the carb with it running as it sounds like a fuel leak to me.
The hole behind the speedo funnels any vapours straight into the cabin, so it doesn't need to be a lot of fuel escaping to get smelly.
Is there any sign of watermarks from evaporated fuel on the exhaust below the carbs?

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slacko
 Post subject: Re: Fumey cabin
PostPosted: Sun Sep 10, 2017 9:31 pm 
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What engine breather set up do you have ?
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Morbo28
 Post subject: Re: Fumey cabin
PostPosted: Mon Sep 11, 2017 7:12 pm 
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Or even fuel tank breather. If the breather tube is missing or cracked or inadvertently vents to the boot, the petrol fumes come straight into the cabin.

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peterb
 Post subject: Re: Fumey cabin
PostPosted: Mon Sep 11, 2017 7:22 pm 
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maybe check boot seal too,
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Phil 850
 Post subject: Re: Fumey cabin
PostPosted: Mon Sep 11, 2017 8:27 pm 
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I'll check the breather but I'm pretty sure I routed it through the floor when I fitted the 27 litre tank.
Engine breather is a simple hose out of the rocker cover and then down beside the engine to atmosphere. I could route this to the air cleaner ?.
I'll also have a look around the carb while running.

Thanks for the ideas.

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simon k
 Post subject: Re: Fumey cabin
PostPosted: Mon Sep 11, 2017 8:39 pm 
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I thought that was just a mini thing... mine have always stunk

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phillb
 Post subject: Re: Fumey cabin
PostPosted: Tue Sep 12, 2017 7:38 am 
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Phil 850 wrote:
I'll check the breather but I'm pretty sure I routed it through the floor when I fitted the 27 litre tank.
Engine breather is a simple hose out of the rocker cover and then down beside the engine to atmosphere. I could route this to the air cleaner ?.
I'll also have a look around the carb while running.

Thanks for the ideas.


I would study the various standard factory breathing setups and choose one that suits your layout. I know someone who put up with the smell for years and couldn't believe the difference once setup correctly.


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Hobson
 Post subject: Re: Fumey cabin
PostPosted: Tue Sep 12, 2017 9:35 am 
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simon k wrote:
I thought that was just a mini thing... mine have always stunk



Isn't that why we all have to smile as we drive?

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9YaTaH
 Post subject: Re: Fumey cabin
PostPosted: Tue Sep 12, 2017 7:12 pm 
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Phil 850 wrote:
I'll check the breather but I'm pretty sure I routed it through the floor when I fitted the 27 litre tank.
Engine breather is a simple hose out of the rocker cover and then down beside the engine to atmosphere. I could route this to the air cleaner ?.
I'll also have a look around the carb while running.

Thanks for the ideas.


If it is still an issue...look into (say) a two piece speedo/production rotisserie hole cover on the firewall side...sealed with lots of rubber U Channel...but easily disassembled to get at speedo cable, electrics etc :idea:

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clovus
 Post subject: Re: Fumey cabin
PostPosted: Tue Sep 12, 2017 7:31 pm 
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You can get some felt for the firewall, made a big difference to mine.

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Phil 850
 Post subject: Re: Fumey cabin
PostPosted: Sat Sep 16, 2017 7:52 pm 
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Well I rerouted the engine rocker cover breather hose to the air filter and the fumey cabin is cured :D


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9YaTaH
 Post subject: Re: Fumey cabin
PostPosted: Sun Sep 17, 2017 9:38 am 
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Well done...now keep a regular eye on filter cleanliness :idea: :D

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