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Bill


Joined: Mar 13, 2005
Points: 13

Honda EX350 generator mystery, please help
Original Message   Mar 13, 2005 5:06 pm
Hi guys. I have tried getting to the root of this problem via other forums without luck.  After doing some searching, I was able to track down this forum, it's great!  I have a problem with my Honda EX350 generator. Here's some information regarding this unit in case you haven't seen one before. It is powered by a small two stroke engine mixed at a 100:1 ratio. The carburetor is mounted to the bottom of the crankcase and uses a single metal reed valve. The igniton is a solid state design. Because the generator is of an inverter design (much like the newer Honda generators), the engine does not have to run at 3600 rpm. There is a low rpm position (150 watts) and a high rpm position (300 watts). Here is the problem.

When in the high rpm position under full load (300 watts), after almost exactly 2 minutes of running, the thing bogs down for about 6-7 seconds (just like you were putting the choke on), then goes back up to normal rpm. This goes on until it runs out of gas, like clockwork, every two minutes. I cannot figure out what is causing this. I have checked absolutely everything and have come up with nothing. I have a friend who owns the same unit, and after spending hours troubleshooting my generator and finding nothing, I was forced to simply change parts to see if I could find the problem. Here is what was changed.

air filter, carburetor, reed valve, spark plug, exhaust, gas cap (vented)

None of this fixed the problem. The thing is, the engine starts first pull every time and runs at a steady rpm.  The engine just seems to be loading up and just bogs down for a few seconds, then it seems to clear itself up.

Here's the thing, partially blocking the air intake with my thumb causes the engine to run the exact same way until I remove my thumb. But when the engine experiences the problem by itself, it only happens every two minutes.

Does anyone have any ideas what might be the problem, I am out of ideas.
This message was modified Mar 13, 2005 by Bill
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spacom


Joined: Apr 30, 2006
Points: 1

Re: Honda EX350 generator mystery, please help
Reply #30   Apr 30, 2006 12:11 pm
Hi,

I am from the UK and have the  almost the same fault

I run the generator and when I first start it, green light is on then goes onto red overload and pulls the revs down

if you take the inverter cover off you might feel it hot in one place and you can also disconnect the blue socket

and just run it on 12v to try it you should see a diffrence.

I am sure you have nothing wrong with the engine but its worth checking the

float valve it could be trying to flood the carb but manages to keep going when its cleared.

if you happen to find any iverters for mine please let me know.

Les

wojre


Joined: May 8, 2007
Points: 1

Re: Honda EX350 generator mystery, please help
Reply #31   Jun 4, 2007 12:36 am
Hi spacom.

Did you solve the problem with your EX350 ?

Scavenger


I've used up all of my sick days, so I'm calling in dead.

Location: Deep in the Appalachian Mountains
Joined: Jun 7, 2008
Points: 1

Just picked up a used EX350 - Any help would be greatly appreciated
Reply #32   Jun 7, 2008 3:28 am
I recently ran across an ad on Craigslist for a used, inoperable EX350 for $100, so I bought it thinking that I could get it going relatively easily and at a reasonable cost.

Are there any special starting procedures for this machine??

The fellow I got it from said that he used it 2.5 years ago, placed it back in his shed where he stored it, ran across it last week when cleaning the shed and decided to sell, which is where I enter the picture.

The tank was empty, so I promptly filled with petrol with a 50:1 mixture. Attempted to start and nothing.

Removed the plug, and it appears to be brand new.

Checked for a spark, and there is none. Knowing that it is relatively rare for a coil pack just to "go out' from idly sitting in a shed, I am curious to know if I am missing something other than my mind.

Any and all help in this area would be tremendously and greatly appreciated.

Yours,
Jon
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