Clark GPX25E Missing - Technical Troubleshooting discussion in Forkliftaction's forums

Clark GPX25:
Clark GPX25E Missing

New to the page trying to figure out a problem with our fork lift. When starting the fork lift it run fine for about a minute as soon as you move or get up to any amount of speed it starts to misfire. I have pin pointed the misfire to cylinder 3. Are there valve adjustment to be made on these engines. This is a Mitsubishi Engine that is in the machine. Spark plugs, wire, cap and rotor have been changed. Any help would be greatly appreciated.

Posted 25 Apr 2024 05:39
Discussion started by Devin_Loose
Pennsylvania, United States

Clark GPX25E with Mitsubishi Engine

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I have not. That was going to be my next checking point. It very weird. It starts fine and runs good for about a minute or two. If I go across the lot at full speed it will start to miss. Turn it off and let it sit for a few minutes it starts up fine like nothing ever happened. Will check compression and get back and let you know results.

Posted 25 Apr 2024 21:26
Reply by Devin_Loose
Pennsylvania, United States

Clark GPX25E with Mitsubishi Engine

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Valve adjustment is hydraulic, they are prone for sticking valves. Have you done a compression test? I had one it used to run fine but once hot it dropped onto 3 cylinders. Once it did this if you stopped the engine and restarted it you could here it was down a cylinder when cranking. It was a sticking valve.

Posted 25 Apr 2024 21:12
Reply by andrew_k
England, United Kingdom

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