lampini Posted May 23, 2017 Report Share Posted May 23, 2017 Does anyone know if there's an equivalent air filter available from an ordinary motor factor? Or anywhere I could order one online to be delivered before 3rd June? Thanks for any help... Jane x Link to comment Share on other sites More sharing options...
Jen-in-Wellies Posted May 23, 2017 Report Share Posted May 23, 2017 I took my old filter with me to a motor factors and they matched it for me. It is a circular one, so they just measured outside and inside diameters and the thickness. Mines a Beta43, so the part number I have may not be the same as a 38. You may have to try more than one factor and explain that it is for a boat engine. Some staff now can't cope with finding parts when you don't have a car registration number they can look up. Jenny 1 Link to comment Share on other sites More sharing options...
lampini Posted May 23, 2017 Author Report Share Posted May 23, 2017 Thanks Jen, we have a very helpful chap locally so I shall try him.... Link to comment Share on other sites More sharing options...
john6767 Posted May 23, 2017 Report Share Posted May 23, 2017 I believe the air filter on all Betas, at least those found in narrowboats is the same. It is also the same as is used on BMC engines, at least the is what Calcutt tell me. Link to comment Share on other sites More sharing options...
Machpoint005 Posted May 23, 2017 Report Share Posted May 23, 2017 Somebody will be along to tell me I'm wrong, but I would think that provided the combustion air goes into the edge of the filter box, through the filter medium, and out of the middle into the engine, it won't make a whole lot of difference? Link to comment Share on other sites More sharing options...
dor Posted May 23, 2017 Report Share Posted May 23, 2017 Vetus just have a big box with no filter. On my previous boat with a Thorneycroft engine, there was a pancake-type filter. I removed it and found that surprisingly the engine was quieter, and seemed to use less fuel. I think even with a new filter it was constricting the airflow quite a bit. I don't think boat engines are subjected to the same sort of grit and dust that a car engine would get; the box is basically there to stop you dropping a nut down the air intake. So you could just leave the air filter out! Link to comment Share on other sites More sharing options...
Ryeland Posted May 23, 2017 Report Share Posted May 23, 2017 Try these; Inline filters FFR-CA5315 Midland Chandlers EA-094 Reisse 46100020 Fram CA5315 Beta 211-61831 Link to comment Share on other sites More sharing options...
Machpoint005 Posted May 23, 2017 Report Share Posted May 23, 2017 1 hour ago, dor said: I think even with a new filter it was constricting the airflow quite a bit. I accept your report, but if there was less airflow, wouldn't less fuel get burned? An engine will only burn a certain air/fuel mixture, IIRC. 1 hour ago, dor said: I don't think boat engines are subjected to the same sort of grit and dust that a car engine would get Depends where the air intake is? Link to comment Share on other sites More sharing options...
Chewbacka Posted May 23, 2017 Report Share Posted May 23, 2017 37 minutes ago, Machpoint005 said: I accept your report, but if there was less airflow, wouldn't less fuel get burned? An engine will only burn a certain air/fuel mixture, IIRC. Depends where the air intake is? Spark ignition (Petrol) needs to have the correct mixture, so the fuel amount is varied with the air amount. Diesels work by compressing a fixed amount of air which makes it very hot and then injecting some fuel which will ignite. This is a bit simple, as if you have a turbo, the amount of air in the engine goes up as the revs go up because the blower forces more air in, but again it is not simple as the engine controls the turbo. However if any engine (petrol and deisel) has a restricted air intake, some of the engine power will be used by making the engine 'suck harder' to overcome the vacuum caused by the restricted air flow, so for the same power at the prop, the engine speed control will have to be open a bit more. Link to comment Share on other sites More sharing options...
Machpoint005 Posted May 23, 2017 Report Share Posted May 23, 2017 2 hours ago, Chewbacka said: some of the engine power will be used by making the engine 'suck harder' Indeed, but is it a significant amount? The diesel engine speed is controlled by the amount of fuel injected, but a petrol engine is controlled by the amount of air going in. I was wondering if Dor's experience could be put down to some other factor, but was more unburnt fuel going straight into his exhaust system? Link to comment Share on other sites More sharing options...
adam1uk Posted May 23, 2017 Report Share Posted May 23, 2017 6 hours ago, john6767 said: I believe the air filter on all Betas, at least those found in narrowboats is the same. It is also the same as is used on BMC engines, at least the is what Calcutt tell me. Not even all Beta 43s have the same air filter. The design changed a few years ago, so it's different for newer engines. One is orange, the other blue. If anyone is at the Crick show, the Beta stand does oil filters and air filters for a fiver each, and if they haven't got the one you need, they'll send you one for the same price. Link to comment Share on other sites More sharing options...
lampini Posted May 23, 2017 Author Report Share Posted May 23, 2017 Really useful stuff here - thanks all! May ask my mechanic about leaving it out; even just until I find a replacement..........it's well mucky! :-) Link to comment Share on other sites More sharing options...
Jen-in-Wellies Posted May 23, 2017 Report Share Posted May 23, 2017 (edited) 3 hours ago, adam1uk said: Not even all Beta 43s have the same air filter. The design changed a few years ago, so it's different for newer engines. One is orange, the other blue. If anyone is at the Crick show, the Beta stand does oil filters and air filters for a fiver each, and if they haven't got the one you need, they'll send you one for the same price. The Fram CA5315 listed by Ryeland above is what is in my Beta 43. It is orange and the engine is approaching ten years old. This will be the same as the inlinefilters part number. Inlinefilters do a very good mail order service. Getting your oil and diesel filters at the same time, plus spares for the next service will cut the propertion of the cost that is postage. Jen Edited May 23, 2017 by Jen-in-Wellies Link to comment Share on other sites More sharing options...
Cheshire cat Posted May 23, 2017 Report Share Posted May 23, 2017 If it is "well mucky" that would suggest leaving it off is not a good idea. Link to comment Share on other sites More sharing options...
bighida Posted May 25, 2017 Report Share Posted May 25, 2017 Filtermania Limited in Stafford, specialises in filters for all types of narrowboats including Air, Oil and Fuel. Top brands at very competitive prices. Filters sold individually or as a service kit. For example Beta Air Filter 211-61831 quality equivalent priced at £4.80 including vat or £29.99 for Air, Oil & Fuel including vat and delivery! Ship nationwide. See : www.filtermania.co.uk or Call : 01785 226969 1 Link to comment Share on other sites More sharing options...
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