Help needed. Forklift LPG engine tune up

I share the same experience as others. I don't know that is so much we fail, it's just propane is very picky about mixture, way more picky that petrol. If everything isn't just right, it just won't work properly. But if you've already got the kit, by all means, give it a go.

Years ago I had a co worker who was a forklift mechanic. He showed me how to set the propane mixture. He started the forklift a small 4 cylinder engine and let it warm up. He shut it off and removed 3 spark plug wires and restarted it and held the throttle wide open and adjusted the mixture to get the highest RPM. What could possibly go wrong?

Cmark said: How did you fail? Click to expand... Kitted a few at different times during 14 years of owning forklift shop in Tupelo MS. Most failed during opening difficulty of removing the cover or bad threads at reassembly. Basically, because it was in too poor a condition to repair, but wanted to try. No shade on you, actually a solute for your success (if so).

Well. It's all back together. Now it's hard starting, it still runs rough, and the brakes don't work, and when you blow the horn it starts to rain for some reason?? Haha. No, only joking. It runs great. Thanks for everyone's input. Figured out the wiring. Has this strange system where when you start it, the gas lockoff solenoid only opens when a control box detects a voltage on the coil HT wire. Then when you turn the key off, the gas solenoid closes right away but the ignition stays on with a 10 second timer. An AI search tells me this is fairly common with systems like this one with a longish hose run between regulator, LPG carburettor and throttle body. Designed to burn off the gas in the system to prevent backfiring at start up, apparently.

You had me there for a second and I did chuckle about it. And now you have a spot in the elite category of successfully rebuilding an old LPG regulator. Great work keeping your fork running.

Cmark said: Well. It's all back together. Now it's hard starting, it still runs rough, and the brakes don't work, and when you blow the horn it starts to rain for some reason?? Haha. No, only joking. It runs great. Thanks for everyone's input. Figured out the wiring. Has this strange system where when you start it, the gas lockoff solenoid only opens when a control box detects a voltage on the coil HT wire. Then when you turn the key off, the gas solenoid closes right away but the ignition stays on with a 10 second timer. An AI search tells me this is fairly common with systems like this one with a longish hose run between regulator, LPG carburettor and throttle body. Designed to burn off the gas in the system to prevent backfiring at start up, apparently. Click to expand... You are correct, it keeps the ignition on to burn off the propane "after" the lock off valve, then engine dies. At that point, something has to turn off ignition or it will drain the battery, hence the time delay.

Now it's hard starting, it still runs rough, and the brakes don't work, and when you blow the horn it starts to rain for some reason?? I've heard that before, usually preceded by "Ever since you worked on my car....." Joe H