3rd injection pump

[alexanderfoti]

Hi all

I am currently installing my 3rd injection pump after 3000 miles.

On the first, I ran lots of random fuels, WVO, diesel, engine oil etc. I put this one down to bad filtration.

Round 2, I fitted a mesh dropout filter and a CAV296 filter, at the same time I switched to 100% WVO.

The first pump Died all of a sudden, I was riding along, happy as larry and it just stopped. Confirmed no fuel coming through after I removed the injection pipe and nothing came out.

This pump did the same, then came back slowly, heavy misfiring at idle then power returned so I managed to get home. It then wouldnt start at all. This one will nearly start whilst pumping out a bit of smoke, but its not getting enough fuel through to run properly.

The 3rd pump hasnt been installed yet, still waiting on it to arrive after a week!, any thoughts on why they keep failling?

[gilburton]

They can't handle the veg oil in heavy mixes.
Try running it on straight diesel for 3000mls+ and if it lasts that's your answer!!

[alexanderfoti]

That's a pain. Is there anybody else with any wvo experience having the same problems?

[alexanderfoti]

Also, I wonder which part inside the pump fails, would be easier and cheaper than replacing the pump each time.



My thoughts are 11, 13, 10 and 5.

Although, when I pulled mine apart there was an additional seperate piece in 10, that could be removed. A sort of collar with ridges in it.

[gilburton]

Does this coincide with the recent cold weather?? If so it may be you'll have to thin out the mix.
I did some calculations a few years ago and came to the conclusion it wasn't worth the effort of running WVO in these engines as to get an acceptable
ratio it was so little eg something like 25% wvo to 75% diesel that the savings were not any advantage.
There have been plenty of reports of people trying to use WVO but I don't think any were particularly successful .
Most people who run these engines on straight diesel do not report any significant problems(apart from Chinese quality)
Only good thing is these pumps are not particularly expensive so if you want to carry on using veg oil possibly you could carry a spare??

[alexanderfoti]

Does this coincide with the recent cold weather?? If so it may be you'll have to thin out the mix.
I did some calculations a few years ago and came to the conclusion it wasn't worth the effort of running WVO in these engines as to get an acceptable
ratio it was so little eg something like 25% wvo to 75% diesel that the savings were not any advantage.
There have been plenty of reports of people trying to use WVO but I don't think any were particularly successful .
Most people who run these engines on straight diesel do not report any significant problems(apart from Chinese quality)
Only good thing is these pumps are not particularly expensive so if you want to carry on using veg oil possibly you could carry a spare??

IT doesnt seem to coincide with the weather, and it doesnt seem to get progresively worse as I would expect, it goes from running well one minute to nothing the next. I assume as the pump is not able to build up to the pop pressure of the injector so simply nothing gets injected.

I am happy to rebuild the pump when needed, but these pumps are getting more and more expensive. The last one was £50 pounds!

Direct equiptment sales appear to have gone out of business too

[gilburton]

I can assure you £50 for an injection pump is cheap. Try googling for a Yanmar original!!

[alexanderfoti]

I can assure you £50 for an injection pump is cheap. Try googling for a Yanmar original!!

I have actually bought a yanmar original for £65 but it has no fuel solenoid. Seems to be an addition by the chinese cloners.

Not saying that its expensive, but surely the valve that wears is much cheaper than the whole pump.

[coachgeo]

All I can think of is to do some digging on the tolerances/spec's of things in the pump like diameters, spring tension, etc. Takes yours apart and measure then to see what is out of spec. Maybe you can convince a local diesel pump rebuilder to pull it apart in your presence (invite them to your house for a 6 pack?) so they can give you their .02 on what looks worn out. Probably though would have to take pump apart and show parts to the shop and see if they will add their .02.

[alexanderfoti]

Already had the the old one apart so that shouldnt be an issue. Now to befriend a diesel specialist

[UAofE]

Diesels cannot run on anything but diesel fuel or Biodiesel. No matter how much you settle and filter that WVO it will still have dissolved food fats, high acidity, moisture, glycerin and other non-combustible contaminants.
Viscosity is also a huge issue even in hot summers. High viscosity drastically reduces lubrication to the pumping elements and increases strain on all the moving parts. The rsulting poor spray pattern also washes down your cylinder walls, contaminates your oil, plugs the compression rings and drastically increases emissions.


Used engine oils, hydraulic oils and ATF are far worse since they have wear particles in them. It doesn't matter what Diesel ran his engines on, he didn't design your engine. There aren't any diesels on the market built with the intention of burning waste oils except for very large sub-300rpm marine engines (that run on "bunker fuel").
Soot in diesel engine oils is far worse than anything else I have mentioned so far, its like running very fine sandpaper through your injection pump and even multiple passes through a 2-micron absolute filter will not remove it.

The only safe alternative is to convert the waste oils to Biodiesel. Biodiesel was invented specifically to address all those contamination, acidity, glycerin and viscosity problems.
You may say "Well the last pump I bought was only £50 pounds, I saved more than that in a month in fuel costs!" but think about all the associated emissions from the manufacture and shipping of that pump from the very dirty manufacturing plants in China!

[alexanderfoti]

50 a month on a fuel pump is stil too much!

I dont get WVO for cheap enough any more, so proccesing is impossible too. Add to that I do not have a storage space outside for converting or storing wVO.

I have said it before, These engines are cheap enough that if I blow one up with dodgy fuel, then its an excuse to buy a z482, which as its indirect, will run better on "alternative" fuels.

[UAofE]

Yes, IDI engines are far more tolerant. They have lower injection pressures, a single atomizing nozzle orifice instead of 3 to 9 orifices per injector and the prechamber helps vaporize and preheat the oil before main combustion.
They are still vulnerable to all the same risks, just less likely to outright fail.

[coachgeo]

Yes, IDI engines are far more tolerant. They have lower injection pressures, a single atomizing nozzle orifice instead of 3 to 9 orifices per injector and the prechamber helps vaporize and preheat the oil before main combustion.
They are still vulnerable to all the same risks, just less likely to outright fail.

They sell special injectors for higher viscosity fuels, I know they are available for the Bota. Don't know if they sell any for single cylinder engines of any make though.

See the Elsbett web site http://www.anc.me/

There store/shop is http://www.greasenergy-shop.com/

He will sell just the injectors...... hard to find the individual parts and prices the way his site is set up.

[UAofE]

Elsbett is a scam. Changing the injectors does nothing for the pump, oil acidity, fats or glycerin.

[alexanderfoti]

Yes, IDI engines are far more tolerant. They have lower injection pressures, a single atomizing nozzle orifice instead of 3 to 9 orifices per injector and the prechamber helps vaporize and preheat the oil before main combustion.
They are still vulnerable to all the same risks, just less likely to outright fail.

They sell special injectors for higher viscosity fuels, I know they are available for the Bota. Don't know if they sell any for single cylinder engines of any make though.

See the Elsbett web site http://www.anc.me/

There store/shop is http://www.greasenergy-shop.com/

He will sell just the injectors...... hard to find the individual parts and prices the way his site is set up.

Thanks Coach, I have been in touch with him and he doesnt do anything for the L100 unfortunately.

[alexanderfoti]

Elsbett is a scam. Changing the injectors does nothing for the pump, oil acidity, fats or glycerin.

They have a lot of happy commericial customers?