Propane GX200 Misfiring Under Load

[@dieseldes6578]

Close up the plug gap. Worked for me on a gas generator with a honda twin engine. Also try adjusting the mixture.

[@ShaunDobbie]

I did, closed it to 0.6mm and then a little more.

[@Deveak]

Have you checked the valve lash? Also what’s up with that governor? Digital?

[@ShaunDobbie]

Digital governor, which controls throttle. Valve lash was adjusted recently.

[@Deveak]

@@ShaunDobbie got a video on that governor? Also I don’t see it in the video, are you using a regulator like a garretson? Have you checked to see if it’s getting fuel properly?

[@dav1dbone]

Probably stupid question, but is there good contact between the grounds, coil and engine block, also is the gx200 engine grounded to the actual van?

[@ShaunDobbie]

Yes, it is and the ground connection is very good.

[@dav1dbone]

@@ShaunDobbie might give it a try floating, not ground to van chassis incase something is affecting the ignition system. Probably sounds daft but it's something I would do myself without questioning it.

[@ShaunDobbie]

@@dav1dbone It has a strong ground connection through the exhaust, so there's not much I can do in that regard.

[@dav1dbone]

Might be the hv lead going to the plug,

[@ShaunDobbie]

Tried a different coil and same result.