Polarity Selection; High Altitude Operation - Honda EW171 Owner's Manual

Polarity Selection
The welding terminals are labeled
"+"
(positive) and
'I-"
(negative). Changing
the polarity of the cables will affect the weld. The correct polarity selection is
dependent on the type of electrode you are using and the type of material you
are welding; refer to the electrode manufacturer's recommendations for best
results.
For straight polarity, attach the electrode cable to the negative terminal, and
attach the ground cable to the positive terminal. To change to reverse polarity,
reverse the cables.
I
STRAIGHT POLARITY
I
7-1
U
lil
CABLE
REVERSE POLARITY
ELECTRODE
High Altitude Operation
At high altitude, the standard carburetor air-fuel mixture will be too rich. Perfor-
mance will decrease, and fuel consumption will increase. A very rich mixture will
also foul the spark plug and cause hard starting.
High altitude performance can be improved by specific modifications to the
carburetor. If yolu always operate your generator/welder at altitudes above
1,500 meters (5,00Ofeet), have an authorized Hondaservicing dealer perform
this carburetor modification.
Even with carburetor modification, engine horsepower will decrease about
3.5% for each 300-meter (1 .OOO-foot) increase in altitude.
The effect of altitude on horsepower will be greater than this if no carburetor
modification is made.
When the carburetor has been modified for high altitude operation, the air-fuel
mixture will be too lean for low altitude use.
Operation at altitudes below 1,500 meters (5,000 feet) with a modified carburetor
may cause the elngine to overheat and result in serious engine damage. For use
at low altitudes, have an authorized Honda servicing dealer return the carbur
to
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