Is a fuel primer bulb legit?

[Wotname]

Or use the inflate side to pump air into the fuel tank via breather and push the fuel through the system.

[Palarran]

Originally Posted by Wotname

Or use the inflate side to pump air into the fuel tank via breather and push the fuel through the system.

I can't access mine very easily. But would it work? You would have to pump through the fuel pump.

[Pegu Club]

Originally Posted by Dsanduril

Many Racor filters come with an optional manual priming pump (or electric if you like). Mine (sorry, not sure model #) has a plunger pump on top. Takes about 10 strokes to fill the filter, then about 5 more to get fuel coming out the bleed screw on the engine.

Separ makes an inline pump that can be used with any filter.

Thank you, I will have a look at the options you presented.

Fair winds,

[GILow]

Originally Posted by Wotname

Or use the inflate side to pump air into the fuel tank via breather and push the fuel through the system.

What could possibly go wrong? [emoji846]

[BigAl.NZ]

Originally Posted by I14

I had one on my Perkins 4236 motor and it was brilliant. These motors are super fussy to bleed and with the bulb I could get it to squirt out of the injector pump bleed screw, then with an injector cracked it would fire up straight away. An alternative is some diesel cars come with a primer plunger atop the primary filter, Mazda utes for example. You can get one from a wrecker and they work well too though ultimately air can leak down the plunger shaft so not as reliable longterm as the bulb.

Which part of the system did you put it between? Was it between lift pump and Racors?

[dennismenace111]

This is what I bought for my little yanmar 2gm . Its got an integral pump. Unscrew the black knob on top and give it a few strokes and crack each injector, one at a time and bleed everything at the injectors.

On larger engines this may not have enough through put. But favor makes lots of filters with integral pumps.

https://www.jmesales.com/racor-200-s...CABEgKSpfD_BwE

[fred4936]

Mine is between the tank and Racor. It does work well, but need to move it to the highest point, and make it easily and quickly removable should an issue arise.

[BigAl.NZ]

Anyone have any link for a suitable 12v electric pump?

Needs to not restrict flow when open.

Motor is a Perkins 4.108.

Al

[rbk]

https://m.aircraftspruce.ca/catalog/...facetpumps.php

[kmacdonald]

These are really good: https://www.facet-purolator.com/posi-flo/
These might be even better but more expensive: https://www.facet-purolator.com/gold-flo/

I use the posi-flo.

[GILow]

Just watch out for the cheap and nasty Facet rip-offs online. They really are garbage.

[BigAl.NZ]

Thanks for the tips on the pumps. I think I will order a facet - may take a while to get to NZ from the USA at the moment, so in the meantime I put a bulb inline with the fuel system for a Perkins 4.108.

Given how much fuel that bulb moves I was shocked how much I had to pump it to get clear fuel coming out of the top of the Injector Pump. Doing this with the lift pump manually would have taken a looong time - easily in excess of 100 pumps IMHO.

I went 10 bulbs past clear fuel flowing out of the bleed screw on the injector pump, and then cranked three seperate times for 10 seconds with two injectors cracked - not even a hint of starting.

I finally gave up, closed the injector nuts, and used some WD40 which I know is bad, and even then it took a bit to fire and start.

Why the hell is this 4.108 so hard to bleed after running dry? Once bled she is a beaut but if you run her dry - the bleeding is painful.

[BlackHeron]

You might have to crack the nuts at the top of each injector and a few other spots on the fuel pipes to get all of the air out of some stubborn fuel systems.

I have a Green Plague Volvo-Penta 2003 and while it has many, many, many faults it is a breeze to bleed.

I can fill the Racor 500 and the spin-on secondary fuel filter with the squeeze bulb from bone dry after installing new filter media in just 30 seconds of pumping with the bulb and cracking the bleed screw at the top of the spin-on filter. When I see bubble-less flow of fuel at the bleed screw I can stop and it'll fire right up every time.

If you don't want to install one of these amazing simple devices on you diesel that's your choice. Me, I like to do things the smooth and smart way.

[a64pilot]

Originally Posted by GILow

Just watch out for the cheap and nasty Facet rip-offs online. They really are garbage.

I carried one for a back up in case my LP mechanical went out, and have been running one on my generator for well, a few years and a few hundred hours.
Now I’m certain it’s nit as good as the real thing, but if it lasts years, then that’s nit bad, and it runs continuously when the motor does.
For a very intermittent use to bleed filters, I’d have to thing they would be fine for that, just carry a spare of course.

I installed this pump to bleed filters as my factory one was apparently bad, which was believe it or not a Lucas pump, and a real expensive pump too.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

This is what is on the generator
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

[BigAl.NZ]

Originally Posted by BlackHeron

I can fill the Racor 500 and the spin-on secondary fuel filter with the squeeze bulb from bone dry after installing new filter media in just 30 seconds of pumping with the bulb and cracking the bleed screw at the top of the spin-on filter. When I see bubble-less flow of fuel at the bleed screw I can stop and it'll fire right up every time.

Yeah I admit I took a short cut and did not bleed the screw on filter - that may have been the problem.