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The Norfolk Broads Forum / Broads Boat Owners Q & A / air filter assembly for bmc 1.5
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Posted By Discussion Topic: air filter assembly for bmc 1.5

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becclesboating
Sep-01-2012 @ 7:44 PM                           Permalink
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Fens Fatale
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Hi all
help needed again
Thanks for the muffler  advice all fitted and engine much better.
Now its time to get sort the lack of air filter.
Currently just a pipe and would like to fit and air filter assembly any ideas where to get one or if its the right way to go?
Thanks as always

VetChugger
Sep-01-2012 @ 11:26 PM                           Permalink
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There is a BMC 1.5 lump in my boat and the air filter "assembly" looks like a complete home made botch up and nothing standard at all. Looking from the gearbox its on the right side of the engine. It takes a veritable arrangement of wires and cable ties to stop the thing falling off! Not at all helpful I know but I'm not convinced there is a standard air filter assembly for these! I have asked around a few times.

Trevor

www.normanboats.co.uk

stumpy
Sep-02-2012 @ 8:20 AM                           Permalink
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The filter on our 1.5 looks like a 1960s Mini pancake filter (6 inch diameter by 1.5 inch deep perforated rim filled with what looks like coarse wire wool - cleans up OK with paraffin) its held on by a jubilee clip and seems to work - at least its not fallen off yet. I've not measured the intake but I seem to remember its about 2 inches. If you've room in your engine bay I would imagine a K&N universal one would fit (££££) or have a wander round your local garry-boy car acessories and 'tuning' shop 'til you see something close - I reckon one for a 2" SU would do the trick but measure the throat first!

Andy and Kathy (IP11)

steve
Sep-02-2012 @ 8:50 AM                           Permalink
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hi there ,
you could try our site member jason hatch/ sos 24/7 at ludham bridge boatyard , he should be able to help you out or point you in the right direction ,or try these
http://www.calcuttboats.com/engines.html
good luck and let us know how you get on ,

steve and vicky

BroadAmbition
Sep-02-2012 @ 9:07 AM                           Permalink
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I'd be wary of fitting a K&N filter system to your boat.

K&N Filters are very good at what they do.  Very good, and arguably the best available the price is suitably reflected too, they are not cheap.

A K&N filter increases air flow in the induction side tremendously, it also increases MPG and acceleration. They never need replacing either so buying one with the suitable cleaner and spray oil, it should last you for life so in the long run they are cheaper.  I have fitted a K&N system to every road vehicle I have ever owned and still do.

BUT  -  They also increase induction noise by quite a lot as it happens.  I bought a K&N filter and housing for our Beta within a month of installation. After just one day of running with it I had reverted to the standard Beta filter and housing.  The induction noise was just too intrusive, even with all that sound proofing we had fitted.  If your crafts engine is noisy to start with then you might not notice it, we certainly did and it was not acceptable.

I agree with the above, Jason is your best bet and should be able to source you a housing/filter to suit, it would help if you could supply him with the measurement of the induction throat (Although he probably knows this already) and what clearance you have around your engine


Griff

'Broad Ambition'
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www.grifftile.co.uk    DN9

stumpy
Sep-02-2012 @ 9:58 AM                           Permalink
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Good point, well made Griff. I've also used K&Ns  for a while - I think the best sounds came from a Rover 3.5 V8, closely followed by a Morini 350 Strada Evil Grin

Andy and Kathy (IP11)

BuffaloBill
Sep-02-2012 @ 10:05 AM                           Permalink
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Mardles sometimes
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You can see in the top left hand corner of the photo
what people are talking about. This is on our BMC 1.5
on Sapphire. The internals of the filter are like
wirewool and can be washed in petrol and then dipped
in oil and left to drain. It should be re-fitted
whilst still having a film of oil on it.
The idea behind it is that the oil catches any dust,
flies etc and can be easily and cheaply maintained.

Jinkaku Kansei ni Tsutomuru
Koto.
(Gichin Funakoshi)


This message was edited by BuffaloBill on Sep-2-12 @ 1:04 PM


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finny
Sep-02-2012 @ 4:30 PM                           Permalink
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The BMC engine is quite often regarded as " A smelly engine " and the correct air filter assembly should be one that has the engine breather pipe coming off the top of the rocker cover box running into the assembly at some point sucking up and re-cycling engine fumes

on my old Bmc the breather pipe was just  tucked down the side of the engine breathing into the bilge and a smelly engine smell was always present even after a lay-up but with the help of some plumbing bits and bats -it fed directly into the housing recycling engine fumes which inturn improved the smell of the whole boat

finny

PCL023
Sep-02-2012 @ 5:15 PM                           Permalink
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We had to get a new air fillter assy for our 1.8 BMC. It was only fitted with the housing and had no internal foam or wire etc. It was a bit loud without it. We found ASAP supplies had a fair range, listing a few types for 1.8 & 1.5 BMC's.

It's worth taking a look.

Cheers



Paul

IP5

becclesboating
Sep-02-2012 @ 5:28 PM                           Permalink
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Great advice from all ASAP seems a good idea any you recommend ?

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