Garland thank you for the information. I think I better try the newer version of this head. I don't understand why the older fuel system has had no failures while the one with the pressure sensor on the rail has had 5 failures this far.
Steponmebbboom I have used this machinist for twenty plus years. Never had a problem, until these heads. He said this was an automotive engine converted to use propane and was not designed for it. I do understand that he has no knowledge of propane use on a forklift. The old 3.0 yale and hyster used was a marine engine. There are several others that have also used automotive style engines in forklifts with no problems. I do not accept his answer as the gospel. I am wondering about running them to lean with excessive combustion chamber heat. will this cause the seats to recess into the head? How can you richen up this style lift without getting a code?