Wd45 diesel, diesel tar

Do you use biodiesel? I’ve heard it is bad for engines that sit for an extended amount of time. I refuse to purchase it. Have you inspected your tank with a flashlight to see what’s in the bottom of it? If you haven’t replaced both fuel filters then that would be my next step. See what condition the filter canisters are in when you remove them. If they are clean and the filters show no sign of the tar then replace the filters. If you find them with this tar inside then I would worry that it in your pump as well. At that point I would send it to Ed to examine before something gets broken or may already be broken. The following procedure is how I do my D17 which also has the Buda diesel but a different fuel pump. I’m thinking the WD45 pump may have a hand pump on it? I’m uncertain the bleeding procedure on that pump. Someone will chime in to verify that. If they are clean and the filters show no sign of the tar then loosen the bleeder bolt until you get fuel coming out of it with no air bubbles in it. It may take 5 minutes for gravity to get it there. Once fuel is there, remove the fuel window on the pump until fuel arrives there. Replace the window and try to start. If you have a strong battery and it spins the engine over well it should start after several revolutions without cracking the injector lines. Loosening the lines at the injector to make sure you have fuel is preferred but not required. I started my D17 after Ed rebuilt my pump without loosening the lines but I have 2 brand new batteries. Within 3 revolutions it started.

Edited by AC720Man - 18 Oct 2023 at 10:30pm

That sounds like algae in the diesel fuel to me. "Power Service" and some ether companies make a chemical to kill the algae. I like to clean the tank by letting the tank settle then siphoning the fuel and water and algae hunks off the bottom of the tank with a piece of 3/8' copper tubing with a rubber hose that leads to a galvanized hog pan. The debris will be seen coming out of the tank in the shalow pan and most of the fuel can be treated saved. Slowly sweep the copper tubing around the bottom where the bad stuff is. After sweeping out all you can from the tank treat the tank and fill it with fuel. Put on new fuel filters and run for for a good while to get treated fuel through the system. There might be more blockage issues as the system is ran but good filters changed often and keeping the fuel tank full to lessen condensation and tank treated at a maintenance level as described on the Bio Kleen bottle will keep it as good as possible.

Good advice from RW. I agree on the algae in fuel. Always have black slimy crap in your filters with algae. And Bio diesel seems to be worse about it. I would follow RW’s recommendation.

That stuff is bad!!!
My brothers 7060 and our d21 had that crap in them, both had to have the injection pumps rebuilt but they both sat for 15 years.
We had to cut open the 7060 tank and power wash it out but the d21 was in good luck of being able to just blow it out several times.
Good luck!!!

It will, also ethanol, maybe a mix of ethanol, acitone, lacquer, and the power service…
Maybe someone should try that it a bomb box first? Lol

we had a backup diesel generator set with a 500 gallon fuel tank.. We filled it with #2 diesel and started the engine once a month for 15 minute TEST.. After 5 years i drained out the fuel ( which was 90% full) and the diesel was still good.. We poured it in a tractor and used it to batwing mow that summer.

steve(ill) wrote: we had a backup diesel generator set with a 500 gallon fuel tank.. We filled it with #2 diesel and started the engine once a month for 15 minute TEST.. After 5 years i drained out the fuel ( which was 90% full) and the diesel was still good.. We poured it in a tractor and used it to batwing mow that summer.