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It does not look like Parker is going to answer my question, so I am going to have to conclude that their fuel pump for the deuce most probably has zinc in its construction; which is not going to work for vegetable oil-based fuel.

It would be good to read what you come up with, but yesterday I sent Parker tech support my inquiry, and they have responded with:

From this photo, it looks like the base is potmetal. Parker part number 1c-20-10

The Parker fuel pump looks like a major contender. Does anyone know for sure whether the Parker pump head is made of pot metal, or aluminum, or another metal?

Thanks, folks, I will look into all of the options here, and report back, when I make a decision.

I have been running WVO on a multifuel engine for 3 or 4 years now. Last year I went through 2 fuel pumps before I realized that the NOS fuel pump for the multifuel engine is made out of pot metal, which has a high percentage of zinc in it. It turns out zinc is highly active at precipitating...

Brass washers will not work properly as crush washers. Crush washers need to be made of copper, preferably annealed copper washers. Also, Swagelock fittings are not rated for 3000 PSI. However, "autoclave" fittings are. Another tip is stainless steel ferrules do not deform well, so it is...

This is a good question. I happen to have 2 sets of 1-hole injectors for my M756A2. I will try to locate a set of 2-hole injectors for testing with alternative diesel fuels. I did notice that my old 1-hole set was badly coked after running them on alternative diesel fuel for only about 40...

Yes, I ordered a set and installed them this weekend, and fired up the deuce yesterday. It now runs with about 2x power, and half the smoke. I still plan to get the old set functional for backup.

The problems with WMO are: ultra-fine carbon particles, which are sub-micron in size; and dissolved carbon, either of which can turn into coke on the injectors. Centrifuging will remove the sub-micron particles. Running a trubocharger will improve combustion, which will prevent coking of your...

Good points; however, when anhydrous alcohol (either ethyl or methyl) is used in fuel, it is combined with a co-solvent, which is in most cases a polar solvent, such as MEK. When this solution is made the alcohol tends to reject water in favor of petroleum distillates. However, back to the...

I have been dealing with a non-running M376-A2 for 2.5 years. Last week I finally narrowed it down to a bad connector and rotten wires for the fuel pump. Rewiring an old piece of equipment is no problem for me, but for right now the fuse, plus a new connector for the fuel pump would get me...

No. It is lacquer, which comes from burning waste vegetable oil (WVO) as fuel.

I found the local hardware store normally carries it, but was out, so I bought a gallon of lacquer thinner. Ultrasonically cleaning the injectors for a weekend in the lacquer thinner certainly removed more lacquer from the injectors, but the nozzle is still stuck in the nozzle holder. I like...

I have tried Acetone, but it won't touch the injector coke or lacquer. ATF sounds good. I will give it a try. Thanks.

Last weekend I tried ultra-sonically cleaning the 2 stuck injectors in a gallon of fresh lacquer thinner. It got more crud off, but did not get the injectors unstuck. I also tried heating 1 injector that is glued with lacquer from burning vegetable oil as fuel. I heated it to 550F with a...

I ultra-sonically cleaned the 2 injectors, and 2 hydraulic heads from the injector pumps from my 6.2L Chevy van. While I definitely saw progress in sediment loads on the bottom of the ultra-sonic, they are still stuck together. Next weekend I plan to try MEK as a solvent.

Thanks, yes I probed both holes with the .015 wire, and got 4 of the injectors cleaned. This weekend I plan to try gasoline as a cleaning solvent to see if it helps get the last 2 injectors cleaned up.

Thanks, pjwest03, for the suggestions. Yes, I find an ultra-sonic cleaner is essential equipment for cleaning my injectors. I used a 1qt one to clean my 6.2L injectors for years. I now have a 2qt one for the large injectors for the deuce. The 2 stuborn injectors have been ultra-sonically...

Thanks, folks for your recommendations. I noticed MEK has made a come-back, and it is my understanding that it was removed because people who illegally made crystal meth were using MEK as a precursor to their brew. Mineral spirits, on the other hand, works fine as a general solvent, but I was...