A friend of a friend has a EU3000is. It well maintained by a professional service company. He is using 5W30 synthetic oil. The problems show up when the temps get down below about 15F. it is uncharacteristically hard to startAfter running for a few minutes with a load, the RPM start to oscillateResearch shows that the "root cause" is carburetor icing. Honda has a solution that I am skeptical of. It is a 10W heater that is installed in the crankcase ventilation line. The concept it correct (add warm air to the intake ahead of the carburetor), but will a 10W heater make a difference at -10F.Has anyone tried the Honda inline heater ?Any other suggestions ?

Here in Canada Honda's EU3000iS features what the manufacturer calls Cold Climate Technology. To whit ..."Exclusive to Canada. Honda's industry leading "Cold Climate Technology" is specifically designed for our cold Canadian winters. Our exclusive breather heater system helps keep the crankcase ventilation tube free of ice formation and helps prevent generator shutdown."I imagine this is what you're talking about and if the part(s) necessary can be purchased and installed on a US model it would seem logical to me that this would solve this problem with this US model running properly in very cold temperatures.

theoldwizard1 wrote:Research shows that the "root cause" is carburetor icing. The other "root cause" could be deposits building up in the carb.I recommend giving it a good dose of Berrymans B12 Chemtool or Gumout in the gas first.But given the information supplied so far, the heater certainly wouldn't hurt.

I'm sceptical that any "research" nailed the cause of the poor operation. Personally, I've never seen a small 4 stroke engine suffer from icing at 15f. Regardless, if you wish to follow up on the Honda fix for icing, I'd suggest to also make sure the choke, throttle, and governor operations are all set correctly. I'd probably run some fuel system cleaner through it as well.

westend wrote:Regardless, if you wish to follow up on the Honda fix for icing, I'd suggest to also make sure the choke, throttle, and governor operations are all set correctly. I'd probably run some fuel system cleaner through it as well.The machine was just im for service for this complaint. It was pronounced 100% healthy. Oil was changed to 5W30 synthetic. No improvement.Various fuel cleaners and de-icer have been tried.

EU3000is in cold weather | Good Sam Community

westend
Explorer
Jan 06, 2017
I'm sceptical that any "research" nailed the cause of the poor operation. Personally, I've never seen a small 4 stroke engine suffer from icing at 15f.

Regardless, if you wish to follow up on the Honda fix for icing, I'd suggest to also make sure the choke, throttle, and governor operations are all set correctly. I'd probably run some fuel system cleaner through it as well.
Sam_Spade
Explorer
Jan 06, 2017
theoldwizard1 wrote:

Research shows that the "root cause" is carburetor icing.

The other "root cause" could be deposits building up in the carb.
I recommend giving it a good dose of Berrymans B12 Chemtool or Gumout in the gas first.

But given the information supplied so far, the heater certainly wouldn't hurt.
SoundGuy
Explorer
Jan 06, 2017
Here in Canada Honda's EU3000iS features what the manufacturer calls Cold Climate Technology. To whit ...

"Exclusive to Canada. Honda's industry leading "Cold Climate Technology" is specifically designed for our cold Canadian winters. Our exclusive breather heater system helps keep the crankcase ventilation tube free of ice formation and helps prevent generator shutdown."

I imagine this is what you're talking about and if the part(s) necessary can be purchased and installed on a US model it would seem logical to me that this would solve this problem with this US model running properly in very cold temperatures.

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