"Mainframe" wrote in message
...
I may be in the market for a new lawn mower.

But, I have notice that evey mower (except for Hondas) have this bulb that
has to press at lease 3 times before starting the engine.

Why?

And why not Hondas?

Is this an anti-pollution device?

Has lawn mower engine design change that much?

I remember when all you had to do is fill the tank with gas, make sure
that
the oil was full, and pull the cord.

It reminds me of the days before fuel injection in cars.

I've given the subject a bit of thought myself and here is what I've come up
with. Keep in mind this is all pure speculation and shouldn't be regarded
as factual. I believe the bulb allows for a different type of carburetor
design which allows small engine manufacturers to comply with emissions
standards. If the carburetor were continuously primed as are non-bulb type
carburetors, then this might lead to greater harmful emissions for some
reason I haven't been able to figure out yet. Honda has probably figured
out a way to make their product inherently low in harmful emissions (which
Honda is good at), so they didn't have to use the bulb design to meet the
requirements (if indeed there are actual requirements).

I have an older B&S engine on my push mower. There is no bulb and the
engine starts on the first pull. Every other small engine that I have that
has a bulb requires 2-4 pulls to get started.