Fuel priming bulb

IF i fit mine it would be under the cabin sole (as the tank is under the stbd saloon berth) so would always have fuel in it.
just very weary of fitting an unknown item into a perfectly good, tried & tested system

oldbilbo said:
I'm looking to fit one such as this, thanks. But here's a user-review, the first I've seen to express dissatisfaction...



Anyone else echo those thoughts? Or does a well-secured hose clip sort out that issue?
Click to expand...
 
alant said:
Then there is something inherantly amiss with your system, since you should be able to bleed all the way to the inlet side of your injector pump using this 'head'. After the inj pump to the injectors, you need to turn the engine over to engage the injector pump.
Click to expand...

Nothing "inherently" wrong with my system. Like many others I find that an air lock can sometimes exist that takes considerable pressure to shift, and often more head than a few inches of gravity head from the tank. If this was not the case why do so many people consider it necessary to fit a supplementary pump.

Yes the injectors and injector pipes can be bled using the very high injector pump pressure which requires turning the engine and is rarely a problem.
 
oldbilbo said:
I'm looking to fit one such as this, thanks. But here's a user-review, the first I've seen to express dissatisfaction...



Anyone else echo those thoughts? Or does a well-secured hose clip sort out that issue?
Click to expand...

Not a problem that I have encountered but, as you suggest, it goes without saying that the connections must be airtight and so jubilee clips are essential - do not rely on a push fit
 
donm said:
Not a problem that I have encountered but, as you suggest, it goes without saying that the connections must be airtight and so jubilee clips are essential - do not rely on a push fit
Click to expand...

As posted on a previous thread: some of these bulbs have a tiny mesh filter at the near end, which can easily block, stopping the engine. This happened on a friend's boat on a lumpy day in the Irish sea, and it took us a while to figure out the cause. Probably better to remove the filter altogether?
 
theoldsalt said:
Nothing "inherently" wrong with my system. Like many others I find that an air lock can sometimes exist that takes considerable pressure to shift, and often more head than a few inches of gravity head from the tank. If this was not the case why do so many people consider it necessary to fit a supplementary pump.

Yes the injectors and injector pipes can be bled using the very high injector pump pressure which requires turning the engine and is rarely a problem.
Click to expand...

How is any air getting in, to cause an airlock, if there is a head of fuel above it?
There must be something wrong, it makes no sense otherwise.
 
oldbilbo said:
I'm looking to fit one such as this, thanks. But here's a user-review, the first I've seen to express dissatisfaction...



Anyone else echo those thoughts? Or does a well-secured hose clip sort out that issue?
Click to expand...

Fitted one to my Rover L diesel & works a treat.
(as long as you fit it properly - follow the arrows. I had a previous one fitted by the RAC, so it blew back into the tank)
 
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biscuit said:
As posted on a previous thread: some of these bulbs have a tiny mesh filter at the near end, which can easily block, stopping the engine. This happened on a friend's boat on a lumpy day in the Irish sea, and it took us a while to figure out the cause. Probably better to remove the filter altogether?
Click to expand...

I have not come across this but I agree - there should already be two good paper filters in the system and they will be far more effective than a bit of plastic mesh!
 
alant said:
How is any air getting in, to cause an airlock, if there is a head of fuel above it?
There must be something wrong, it makes no sense otherwise.
Click to expand...

It does make sense. For example air can be introduced into the system when the fuel filter is changed or the system stripped for repair/cleaning.
 
Best thing I ever did was to fit one - normal one from the chandlers marked for petrol and diesel. Now instead of wiggiling a little lever to and fro 2 or three pumps of the bulb and the job is done. Took about 5 minutes to fit it and has saved hours of worrying effort since then - you know, pump away for ever, nothing appears have I got everything fitted properly........
 
Right. That's decided.

The next question is what to fit onto the two ends of the cut-through copper supply pipe which will give a good and reliable seal onto the 'squeezy' bulb - or two short sections of hose.
 
looking at mine now-. marked 'tempo' ...a rubber bulb...with a plastic nipple on each end...takes 8 - 10 mm..i.d. pipe,nipples could easily be crushed/got out,and any pipe size would be easily made to fit. AND...if you had 2 lengths of pipe handy..cockpit to engine,and cockpit to tank...if your engine lift pump failed /or you had unsortable air problems...you could probably keep going using the bulb as a hard pump,from the cockpit....need to change hands often...!!!...it may get you home.
 
oldbilbo said:
Right. That's decided.

The next question is what to fit onto the two ends of the cut-through copper supply pipe which will give a good and reliable seal onto the 'squeezy' bulb - or two short sections of hose.
Click to expand...

Get some of the 'rubber hose' from a scrap diesel car & use that each side of the bulb + adequate clips.
 
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