Engine surge, generator
Do you know what the cause of engine surge is on my inverter generator? It is 28oo watts and with no load or eco mode off, it runs smooth. Or, a heavy load, it runs smooth. However, with a low to ...
Forum Discussion
profdant139 wrote:
It is shocking to me that Honda and other major manufacturers have not made a carb that will not get clogged by ethanol.
Honda carbs are actually the most simple carb design you can get and surprisingly works very well.
In any carb, you WILL have something with a very small hole or a combination of small holes, that is needed in order to vaporize the gas from liquid to vapor efficiently.
The Honda design uses a jet at the bottom of the tube, which feeds the small brass tube which protrudes into the air stream right behind the choke butterfly.
Air moving over the brass tube creates a vacuum in that tube which draws fuel up from bowl through the main jet into the tube and the little tiny holes in the tube break up the solid fuel, mixing the air and fuel at the correct ratio.
It only takes one of those small holes in the brass tube to clog and the engine will not run correctly.
There is no adjustments, no fuel/air mixture screws or other small passages to clog up or need to be cleaned.
Your advice to use the gen regularly and/or drain the fuel bowl are spot on, that is the only way to reduce the amount of times you will need to remove the jet and tub and clean.
I would caution anyone who does need to clean the brass tube, try not to widen the holes, doing so will change the air/fuel mixture.
I was able to just use the pressure of a can of carb cleaner with the plastic "straw" on mine which is the safest way to clean the tube. I just held the straw to the jet end of the tube then gave a couple of good sprays. Stuff popped out and once all the holes sprayed carb cleaner I was done.
Poking metal objects like sewing needles in the holes or using tiny drill bits or even oxy/acc torch tip cleaners may affect the diameter of these holes.
