Can I get those seal washers at napa, or do I have to get them from bobcat? Are they Brass washers, or copper ???
Had the exact same issue with a 743 i bought. The copper washers under two injectors had grooves burnt in them from the exhaust gas escaping past the injector and washer.
Napa may have them, if not i diesel injection shop will have them.
When you go to replace them, ensure you give the injector hole a good scrape out of all carbon so it seats correctly. I have installed a rubber cap in the injector hole and scraped the hole with a screwdriver and i used an oring pick to scrape out the threads. I used compressed air to blow the loose crud out but be careful not tp push the cap into the cylinder.