Tokyo, April 22, 2002 --- Honda
Motor Co., Ltd. today announced the release of the new UMK425, the world's lightest*1 4-stroke trimmer, equipped with the 360º -inclinable GX25 4-stroke engine.
The UMK425 is expected go on sale early in the second half of this year at Honda power equipment dealers throughout Japan.
(The UT Type goes on sale August 6th.)
Developed in accordance with the concept, "lightweight, light start, light touch," the UMK425 is designed to be the lightest 4-stroke trimmer in the world, delivering
both high cutting performance and ease of use.
Thanks to the GX25 engine (the world's lightest 4-stroke), compact gear case,
and unitized fan cover made of a special plastic that is both lightweight and
vibration-resistant, the dry weight has been reduced to just 4.8kg --- on a par
with 2-stroke trimmers. Further innovations include an optimized drive gear, specially
designed compact and lightweight gear case, and weight distribution optimized
for maximum operability. In addition, decreased vibration and lower mechanical
noise result in a trimmer that significantly reduces operator fatigue.
The GX25 also offers superb environmental performance, achieving a top-class*2
ranking under American EPA (Environmental Protection Agency) Phase 2 regulations
--- the most stringent in the world.
*1 As of April, 2002. Dry-weight measurement, cutting
head not installed.
*2 EPA: Class I-A (under 65cc displacement) and Class
IV (20cc~50cc displacement)
Another model of the same trimmer, the UMK425H, is expected go on sale early in the second half of this year at designated
home centers. This model is equipped with a body designed to home center-series
specifications. (The UT Type goes on sale August 6th.)
|
| UMK425 4-stroke trimmer |
Other Features of the UMK425
"Fine Start", for smooth startup and superb acceleration
 |
Mechanical decompression results in a class-beating starter rope pull weight of just 7kgf
(Honda in-house testing) --- so light that anyone can start it with ease. |
| |
A newly developed accelerator pump-equipped carburetor results in excellent acceleration
immediately after startup, comparable to that of a 2-stroke. |
Nimble operation
| |
Weight distribution is optimized for maximum operability. The "Fine Frame" results in a
significantly lower shaft swing moment, for reduced operator fatigue. |
| |
The "Fine Grip" features a slimmer handle shape that is easier to grip for people with small
hands. |
| |
The "Fine Throttle" employed on the U Type combines the engine speed-adjustment lever
with the throttle fixing lever --- just squeeze to fix throttle speed. This results in reduced
operator fatigue, even when operating the trimmer for an extended period. |
| |
The "Fine Trigger" employed on the UT and L Types combines a lever that is easy on the
fingers even during extended operation with one that allows immediate engine speed
adjustment. |
| |
The piston and other moving parts have been lightened for reduced vibration, resulting in less
fatigue during hand-held operation. |
Environmental performance
| |
The Honda e-SPEC engine achieves top-class* ranking in both American EPA (Environmental
Protection Agency) Phase 2 regulations and CARB (California Air Resources Board)
Tier II regulations --- the most stringent in the world.
*EPA: Class 1-A; CARB: Under 65cc |
| |
Achieves top-of-class fuel economy and oil consumption. |
| |
Oil-immersed timing belt reduces mechanical noise. |
Design
| |
The unified pipe frame and engine and full-cover construction reduce snagging on branches or
other objects during operation. |
| |
New Power Red coloring heightens brand identity for Honda power products. |
Specifications
| Model Name |
UMK425
(Designated stores) |
UMK425H
(Home centers) |
| Model Type |
U |
UT |
L |
UT |
L |
| Handle Type |
U-shaped |
Loop |
U-shaped |
Loop |
| Throttle Type |
Fine
Throttle |
Fine
Trigger |
Fine
Trigger |
| Size |
Length (mm) |
1,830 |
1,875 |
| Width (mm) |
610 |
585 |
245 |
630 |
240 |
| Height (mm) |
400 |
350 |
240 |
380 |
245 |
| Dry Weight (kg) |
4.80 |
4.70 |
5.25 |
5.10 |
| Outfitted Weight (kg) |
5.60 |
5.50 |
6.05 |
5.90 |
| Engine Model |
GX25 |
| Engine Type |
e-SPEC air-cooled 4-stroke single-cylinder OHC |
| Displacement (cm³) |
25 |
Maximum Output/
Engine Speed
[kW(PS)/rpm] |
0.81 (1.1)/7,000 |
| Carburetor |
Diaphragm type |
| Fuel Type |
Automotive-grade unleaded gasoline |
| Fuel Tank Capacity (l) |
0.55 |
| Ignition |
Transistorized magneto |
| Starter |
Recoil type (with new decompression system) |
| Power Transmission |
Automatic centrifugal clutch |
| Anti-vibration Measures |
Unitized clutch housing |
Rubber mounts |
| Standard Blade |
230 dia. chip saw (36 chip) |
| Equipment |
Goggles |
Included |
Included |
Included |
Included |
Included |
| Blade Cover |
Included |
Included |
Included |
Included |
Included |
| Shoulder Strap |
One/Both |
One/Both |
One |
One |
One |
| Tools |
Included |
Included |
Included |
Included |
Included |
Safety Approval Number |
To be obtained |
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April
22, 2002