Bukh 20 questions

Slow_boat

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I have a Bukh 20 with a fuel filter on the engine. There is no remote primary filter. The filter fitted at the moment is 'Crossland' make and I want to change it for an original Bukh as it hasn't been changed for three years that I've had the boat.

The filter appears to be secured by the standard single bolt through the top and that bolt holds the banjos for the fuel lines. I've tried slackening the bolt but the filter still feels firmly attached. How do I go about changing it? Is it okay to tap filter or bolt to loosen it? Does the replacement need filling with diesel before fitting?

Also, does the engine diode go in the plug by the throttle quadrant? I did it last year but that plug seems a sod to get a spanner on and the quadrant hasn't moved so could be the wrong plug. I can't remember from last year but can't see any other plug.
 

vyv_cox

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The filter housing tends to stick itself into the seal, so a light tap after removing the bolt is usually needed. Rather than filling the bowl with fuel I have always bled fuel through by slackening the exit banjo fitting a little.

Do you mean anode? It is fitted inside a brass plug, about 20 mm across flats, in the cylinder head at the back of the engine.
 

cliff

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Oooops - IIRC the engine mounted fuel filter is a SPIN ON type with a drain on the bottom as per original Bukh - try unscrewing it before you go laying into it with a hammer and chisel. The center "bolt" is (or should be) a banjo bolt and is the fuel outlet to the injector pump - there is another one offset which is the inlet from your tank (should really go through a pre or primary filter first.

The ANODE is held in a brass plug on the rear of the engine BLOCK starboard side in line with the fuel quadrant - PM me if you want a copy of the workshop manual for the DV20 - it makes interesting reading.
 
I concur with Cliff, the fuel filter is a spin on type, and should be reasonably easy to remove with a chain or belt type oil filter wrench. When changing mine, I always fill the new one reasonably full with diesel before fitting to make bleeding quicker and easier, (access is quite easy on our boat so little risk of spillage).

BTW, why do you particularly want to fit a Bukh filter? Bukh will almost certainly buy filters in from a specialist manufacturer, and simply lable them Bukh. I have the equivilent part numbers for a number of different brands at home if you are interested.
 

cliff

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Thanks, all.

I didn't particularly want a Bukh filter, it's in the spares that came with the boat.

It appears that I do have the correct plug for the anode, I just don't remember having trouble getting a spamnner on it last year!
Check your PMs - I think I may have problem sending any (am receiving them OK)
 

RobBrown

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I was advised the best cheaper alternative to Bukh's own spin on fuel filter was the Mann Hummel- WK 832- about 1/2 the price.

I am also aware that older Bukh 20 engines do have a replaceable filter element rather than a spin-on, tho you can get a conversion kit.
 
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