GenConnex Honda EU7000is Natural Gas / Propane Conversion Runs Rough at Idle / Light Load

Here is my Honda EU7000is with GenConnex conversion kit, running on natural gas at ~700 VA. As you can see and hear, the engine is running rough enough to shake the whole generator and it even back-fires half a dozen times during this video. It runs worse with no load at all.

UPDATE 08/30/2021: This has developed into saga - here are all of the videos in the series:

IMHO it is way too rich under light load. The high temperature natural gas orifice was installed. Temperature was 82F.

I reached out to GenConnex for help, but was told that this is to be expected because the engine timing is static, and not appropriate for fuels other than gasoline. They suggest defeating the ECO Throttle, but while that results in more overall noise, which tends to mask the backfires, it doesn't actually solve the problem. And more than that, after spending so much money for a quiet generator, one wouldn't want to defeat ECO throttle, even if it did solve the problem.

I am posting this as public in hopes that someone may know how to solve the problem. If you do, I would very much appreciate it if you would comment here. And if it turns out that nobody knows how to fix it, then hopefully this video will serve to save others from making the same mistakes that I did. I look forward to your comments!

[edbouhl]

Thanks, looks like the dual and tri fuel kits for this Honda are still not ready for prime time. This saved me a lot of grief and time.

[whereswaldo]

I have the EU3000is with the Hutch Mountain kit. And the kit came with two LP jets. I had the plumber run a the Natural Gas line off the drier pipe out the back of the house. Before he left I mentioned the both jets being identical. He said LP is much more volatile and has a smaller orifice.
The jets are plastic and I tried drill bits until one was big enough to not go through. I drilled it out and each step up it ran better as it was stuttering stumbling and stopping. I would step up drill out and try it and it ran better each time until it was steady and smooth.
This is a big generator and needs a bigger jet or the jet orifice enlarged. Hope this helps.
And I left the plug gap the same.
Cheers!

[browsedeweb]

I just purchased the US Carb MSK7000 kit and installed it on my Honda EU7000is. It works great with my 1/2" natural gas connection. Tried running at 6kW, 3kW and low/no loads with and without ECO mode. Perfect and smooth at all loads.

[dmi]

Boy I wish I had found this vid sooner! I just purchased an EU7000is as well as the Genconnex kit and planning to run on natural gas. I will be assembling in the next week. I will report my results back here, but I’m feeling kind of nervous given the experience I’ve read. I wonder if the motor snorkel timing adjustment module can be purchased separately and used in conjunction with genconnex hardware/regulator? Let me know if any of you have done this or are planning to. Thanks! -Dave

[itsupport]

Unfortunately on any of the Honda generator models that have ECO - Throttle idle speed control, when converted to run on natural gas they can no longer be run on the idle setting. This is because of low spark advance. This information is well documented. Just turn off ECO mode and run it at full speed. This is only a problem for natural gas. Not a problem for propane or gasoline.

[rrmerlin]

I'm looking into this same set up from Genconnex. Thank you for posting this, please update what you find good or bad.

[randommeno]

I was wanting the 7000 to run on NG doesent look promising? GenConnex keeps commenting "we listened" did that work?

[nekotherion]

Id check your regulators, and their actual output, and how much pressure your inputting NG wise, Propane vs NG, different density gasses, and different towns put out different NG pressure...while it is a kit, doesnt mean there isnt some adjustment needed, as there are many variables

[jvazquez]

I had experience with dual fuel generators, I have one and rarely use on propane. Reason is less efficient. I use it with Propane bottles (20) pound) barbeque grill size and one bottle will last about 8 hours. Here a refill cost about $20. The honda runs 18-20 hours on 5 gallons of unleaded. That's the reason I have not invested in a propane conversion.

[reddoodler]

I've read that running gas instead of gasoline causes your valves to run hot, since the liquid fuel acts as a lubricant. I don't know if that's true but it makes me reluctant to try the conversion.

[dwightnick]

Hello MrMark. I am buying a Honda EU7000 and need a propane conversion. I called Genconnex but was only able to leave a message. I got a return call that I missed but they left a message saying they contacted you regarding an improvement they made. I looked through all the comments but do not see where you have engaged any further correspondence with them. I am super anxious to know how this shakes out for you! When you get the replacement parts please, please post again.

[SenorDennis]

It’s running lean you need to make an adjustment to the regulator to increase the flow. Look up how to adjust natural gas / propane regulator

[petejames]

I just spoke with my propane vendor - we have a 1000 gallon buried tank. His first questions had to do with where we were going to put the generator. I stated I had an existing yellow flex line for our fireplace to tap into. He didn’t think the yellow flex would provide enough pressure. When I look at the Hush Mountain kits, they have a large regulator. Your video doesn’t show what you are using. I really want to see you get this resolved, as we are putting a Generlink in our house.

[dilipsonar]

Kitana power deta hai jitane ghanta chalata gai
Proce kya hai