Adding a manual fuel primer pump

A

AndrewL

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I am in the process of renewing all the flexible fuel hoses as they are well past their best. The engine is a Beta BZ482, so it has a mechanical fuel pump and spin-on secondary fuel filter on the engine. I've also got a CAV filter/water seperator.

I would like to add a manual fuel primer pump to aid with bleeding after a filter change. I was initially thinking about a squeezy fuel bulb, and a search of these forums shows that many people have done this and been happy.

However, I have also seen these CAV Hand Primer Pump at ASAP Supplies.

Does anyone have any experience of these? Would I just connect the current CAV filter fuel input hose into this pump and then couple the pump outlet to the CAV filter input with another hose? Or is there some clever method where it attaches to the CAV filter body, so that it resembles those CAV filters with built-in primer pumps?

Thanks in advance
 
Yes - they are very good - used one for ten years and more, no problems ( miine is the Pump IN version )
What I like is they pump 'into' the filter head ( there is an option for a pump out type )

A primer that pumps 'into' to the prefilter allows you to bleed all vents on that filter. One that pumps out from the prefilter does not allow you to bleed the filter head - as you are sucking fuel into it ?

Many premade Cav type filter units with the primer built in - pump 'out from' the head. I had one from SSL, but I sent it back when I realised how it was functioning.

The connecting bolts are expensive for a reason - they are 'shanked' as in Goodrich type bolts https://www.merlinmotorsport.co.uk/...ch-hose-fittings/goodridge-banjo-bolts/page:3
and I found no cheap source for them. Normally a banjo fitting has the bolt parallel - and the housing hollow. These fit parallel bore holes - and the bolt is narrower in the middle for the fuel flow.
 
AndrewL said:
I am in the process of renewing all the flexible fuel hoses as they are well past their best. The engine is a Beta BZ482, so it has a mechanical fuel pump and spin-on secondary fuel filter on the engine. I've also got a CAV filter/water seperator.

I would like to add a manual fuel primer pump to aid with bleeding after a filter change. I was initially thinking about a squeezy fuel bulb, and a search of these forums shows that many people have done this and been happy.

However, I have also seen these CAV Hand Primer Pump at ASAP Supplies.

Does anyone have any experience of these? Would I just connect the current CAV filter fuel input hose into this pump and then couple the pump outlet to the CAV filter input with another hose? Or is there some clever method where it attaches to the CAV filter body, so that it resembles those CAV filters with built-in primer pumps?

Thanks in advance
Click to expand...

You remove a fuel line, then bolt the hand pump in its place with a special banjo bolt, finally fitting the fuel line that you removed to the hand pump, using the original banjo bolt. Personally, i'd change the filter head for the one with the built in pump.
 
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