Partsguy- I value your opinion on many posts here but I must disagree with you on this one. I've done research on this subject & found that yes, while the requirements are different, the cost of getting an engine through the testing process is extremely expensive. Therefore using engines that have already been tested using the fuel system installed Is the best option financially.

Its funny that the fuel system on these fortis Hyster's & Yale's is the same fuel system they put on LP fueled cars in Europe. They call the fuel system "industrial" here, but in Europe it's just an automotive application. The fuel injectors & regulators have the same specs.

Not at all about emissions. The 2.0 and 2.4 were and are under powered for most of the applications they were used in. Also these engines were never meant to be rebuilt so unless you were changing basic components you were better off buying a brand new one. Generally the rebuild cost was more than new.
You also might want to check CARB as they have different regulations for on road and off road.
Also it was not Daewoo in bed with GM but PSI and Daewoo working together. GM just manufactured to the OEM's spec but then sent to people like PSI to put the final fuel and other OEM spec parts on them. There a few companies out there that do this with PSI being the biggest.

It's all about emissions my friends. The 2 & 2.4L GM engines are actually Daewoo engines, when Daewoo & GM were in bed together. In a pinch I've used parts designed for a Daewoo car on the engine & they fit like a glove.

As far as the emissions go- as long as an engine passes the emissions tests designed for on the road driving, that engine can be put in anything as long as all the associated emissions equipment goes along with it. That's why alot of the newer engines are from the European market, they have alot more LP powered cars on the road than we in the States do

Just answered my own question in the NACCO Product Change thread.

It is a Mitusbishi based engine

GM and Mazda discontinued making their industrial engines, hence the change.

It looks similar to the 4G63 and 4G64 engine. I have read on there website they have a JV with Doosan aswel. Maybe a Doosan.

I'm aware of all that. Other than the image, the website offers no information on the base engine. Having no luck visually identifying that engine. Right now my best guess is that it's Mitsubishi based, but that's just guessing.

I think this is a company called "Power Solutions International" i believe they just add fuel systems to common engines. For example some Hangcha forklifts come with GM V6 engines but they have a fuel and EPC labelled PSI. Similar to the way Impco used to label engines. Google PSI engines they are in america. There is an image of the 2.0 - 2.4L engine under the industrial engine section.