Honda umc435 Owner's Manual
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Honda umc435 Owner's Manual

Powerhead
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INTRODUCTION

Thank you for purchasing a Honda powerhead. We want to help
you to get the best results from your new powerhead and to
operate it safely.
This manual contains information on how to do that; please read it
carefully before operating the powerhead. If a problem should arise,
or if you have any questions about your powerhead, consult an
authorized Honda servicing dealer.
All information in this publication is based on the latest product
information available at the time of printing. Honda Motor Co., Ltd.
reserves the right to make changes at any time without notice and
without incurring any obligation. No part of this publication may be
reproduced without written permission.
This manual should be considered a permanent part of the
powerhead and should remain with the powerhead if resold.
We suggest you read the warranty policy to fully understand its
coverage and your responsibilities of ownership. The warranty
policy is a separate document that should have been given to you
by your dealer.

SAFETY MESSAGES

Your safety and the safety of others are very important. We have
provided important safety messages in this manual and on the
powerhead. Please read these messages carefully.
A safety message alerts you to potential hazards that could hurt
you or others. Each safety message is preceded by a safety alert
symbol
and one of three words, DANGER, WARNING, or
CAUTION.
These signal words mean:
Each message tells you what the hazard is, what can happen, and
what you can do to avoid or reduce injury.
DAMAGE PREVENTION MESSAGES
You will also see other important messages that are preceded by
the word NOTICE.
This word means:
Your powerhead or other property can be damaged if
you don't follow instructions.
The purpose of these messages is to help prevent damage to your
powerhead, other property, or the environment.
The illustrations in this manual are based on: UMC435
• The illustrations may vary according to the type.
©
2015 Honda Motor Co., Ltd. -All Rights Reserved
31VP8600
00X31-VP8-6000
You WILL be KILLED or SERIOUSLY
HURT if you don't follow instructions.
You CAN be KILLED or SERIOUSLY
HURT if you don't follow instructions.
You CAN be HURT if you don't follow
instructions.
UMC425A∙UMC435A
OWNER'S MANUAL
UMC425∙UMC435
POWERHEAD
Click to Save As
The engine exhaust from this product
contains chemicals known to the State of
California to cause cancer, birth defects or
other reproductive harm.
California Proposition 65
This product contains or emits
chemicals known to the state of
California to cause cancer, birth defects
or other reproductive harm
CONTENTS
INTRODUCTION.................... 1
SAFETY MESSAGES.............. 1
SAFETY INFORMATION ......... 2
LOCATIONS ......................... 4
CONTROLS .......................... 5
CHECKS .............................. 6
OPERATION ......................... 9
PRECAUTIONS................... 9
POWERHEAD...................... 11
MAINTENANCE................ 11
SCHEDULE ...................... 12
REFUELING...................... 13
ENGINE OIL ..................... 13
Recommended Oil.......... 13
Oil Level Check ............. 13
Oil Change.................... 14
AIR CLEANER .................. 15
Inspection..................... 15
Cleaning ....................... 15
THROTTLE CABLE............ 15
SPARK PLUG....................16
COOLING FINS .................17
TANK ..............................17
FUEL TUBE ......................17
SPARK ARRESTER ............18
SUGGESTIONS....................19
POWERHEAD ...................19
TRANSPORTING ...............20
INFORMATION ....................21
Information ......................22
Air Index..........................22
Specifications...................23
Information ......................23
Information ......................24
1

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Summary of Contents for Honda umc435

  • Page 1: Table Of Contents

    INTRODUCTION Thank you for purchasing a Honda powerhead. We want to help you to get the best results from your new powerhead and to OWNER’S MANUAL operate it safely. UMC425∙UMC435 This manual contains information on how to do that; please read it carefully before operating the powerhead.

  • Page 2: Safety Information

    CLOTHES (LONG PANTS) run the engine indoors. • The powerhead and exhaust become very hot during operation. LEG PROTECTORS • Only use Honda approved attachments. If not, injury or accident may occur. SAFETY BOOTS (WITH TOE PROTECTOR) • Read and follow the instructions in the owner’s manual that came with each attachment.
  • Page 3 • Injury caused by vibration and cold: Carbon Monoxide Hazard You may feel the prickling or burning pain in your fingers, and the Your powerhead’s exhaust contains poisonous carbon monoxide fingers may lose color and feeling. It is believed that these gas, which you cannot see or smell.

  • Page 4: Safety Label Location

    COMPONENT & CONTROL LOCATIONS These labels warn you of potential hazards that can cause serious injury. Read them carefully. THROTTLE TRIGGER If a label comes off or becomes hard to read, contact your Honda INTERLOCK servicing dealer for replacement. ENGINE SWITCH...

  • Page 5: Controls

    CONTROLS Starter Grip Pulling the starter grip operates the recoil starter to crank the Engine Switch engine for starting. The engine switch enables and disables the ignition system. The engine switch must be in the ON position for the engine to run. Moving the engine switch to the OFF position stops the engine.

  • Page 6: Before Operation Checks

    BEFORE OPERATION CHECKS Joint The joint is to attach a Honda approved attachment to the IS YOUR POWERHEAD READY TO GO? powerhead. Refer to Pages 7–8 for how to attach and detach the attachments. For your safety, to ensure compliance with environmental...
  • Page 7 3. Insert the latch tongue in the slot of the quick-release latch to For both shoulders For single shoulders reattach the powerhead to the carrying harness. (UMC435) (UMC425) QUICK-RELEASE LATCH TAB CARRYING CARRYING HARNESS HARNESS QUICK-RELEASE LATCH LATCH TONGUE SLOT...
  • Page 8 3. Insert the attachment until the set pin knob clicks. Confirm the 3. Hold the main pipe on the powerhead side and detach the attachment. “ ” mark on the attachment is at the joint holder end. POWERHEAD SIDE SET PIN KNOB MAIN PIPE JOINT HOLDER ATTACHMENT...

  • Page 9: Operation

    If you notice any abnormal sound, smell, vibration, or other unusual signs, stop the engine immediately and consult your authorized Honda dealer. With the engine idling, hook the powerhead to your carrying harness and hold the powerhead at the correct position.

  • Page 10: Starting The Engine

    STARTING THE ENGINE 3. To start a cold engine, press the priming pump several times until a flow in the fuel return tube (transparent tube) is visually noticed. Exhaust contains poisonous carbon monoxide gas that can build up to dangerous levels in closed areas. Breathing carbon monoxide can cause unconsciousness or death.

  • Page 11: Setting Engine Speed

    The maintenance schedule applies to normal operating conditions. If you operate your powerhead under severe conditions, such as sustained high-load or high-temperature operation, or use in unusually wet or dusty conditions, consult your Honda servicing dealer for recommendations applicable to your individual needs and use.

  • Page 12: Safety Precautions

    Check powerhead best and is fully equipped to maintain and repair it. Joint knob Check To ensure the best quality and reliability, use only new Honda Around the joint Check Genuine parts or their equivalents for repair and replacement. holder...

  • Page 13: Refueling

    REFUELING To refuel, rest the engine a level surface with the fuel tank cap facing up, as shown. Remove the fuel tank cap, and fill the tank Recommended Fuel with gasoline to the bottom of the filler neck. Refuel carefully to avoid spilling fuel.

  • Page 14: Oil Change

    Some oil will remain in the powerhead after draining. When refilling with fresh oil, start with UMC425: 2.7 oz (0.08 L), UMC435: 3.3 oz (0.10 L). Slowly add enough oil to fill to the bottom edge of the oil fill hole as shown below. Do not overfill.

  • Page 15: Air Cleaner

    AIR CLEANER Clean Squeeze and dry Dip in oil Squeeze A dirty air cleaner will restrict air flow to the carburetor, reducing Do not twist. Do not twist. engine performance. If you operate the powerhead in very dusty areas, clean the air filter element more often than specified in the MAINTENANCE SCHEDULE.

  • Page 16: Spark Plug

    3. Remove the spark plug with a 5/8-inch spark plug wrench. After adjustment, check the throttle trigger for smooth operation. SPARK PLUG WRENCH Consult your authorized Honda dealer if necessary. SPARK PLUG THROTTLE TRIGGER INTERLOCK 4. Inspect the spark plug.

  • Page 17: Cooling Fins

    Check fuel tubes for cracks and any other deterioration and confirm that there is no leakage of fuel on the fuel tubes. If you notice any abnormal symptoms on the fuel tubes, contact your Honda servicing dealer. Gasoline is highly flammable and explosive, and you can be burned or seriously injured when refueling.

  • Page 18: Spark Arrester

    1. Loosen the 5 mm socket bolt, then remove the top cover. 5 mm SOCKET BOLT TOP COVER 2. Install the exhaust filter (UMC435 only) and spark arrester in the reverse order of disassembly. When you install the spark arrester, the spark arrester’s outlet must point the opposite side of the spark plug.

  • Page 19: Helpful Tips & Suggestions

    HELPFUL TIPS & SUGGESTIONS Short Term Storage (30–90 days) Adding a Gasoline Stabilizer to Extend Fuel Storage Life STORING YOUR POWERHEAD When adding a gasoline stabilizer, fill the fuel tank with fresh gasoline. If only partially filled, air in the tank will promote fuel Storage Preparation deterioration during storage.

  • Page 20: Transporting

    4. Tip the powerhead toward the fuel filler neck again to drain the TRANSPORTING fuel. If the engine has been running, allow it to cool for at least 15 5. After all fuel has drained, reinstall the fuel tank cap securely. minutes before loading the powerhead on the transport vehicle.

  • Page 21: Taking Care Of Unexpected Problems

    TAKING CARE OF UNEXPECTED PROBLEMS TECHNICAL & CONSUMER INFORMATION ENGINE WILL NOT START TECHNICAL INFORMATION Possible Cause Correction Serial Number Location Choke open. Move lever to CLOSED position unless the engine is warm. Engine switch OFF. Turn engine switch to ON position.

  • Page 22: Carburetor Modifications For High Altitude Operation

    Carbon monoxide does not react in the same way, but it is toxic. the requirements of the California Air Resources Board. Honda utilizes lean carburetor settings and other systems to reduce The bar graph is intended to provide you, our customer, the ability the emissions of carbon monoxide, oxides of nitrogen, and to compare the emissions performance of available engines.

  • Page 23: Specifications

    SAE 10W-30, API SJ or later, for general use. Engine Include capacities: MODEL UMC425 UMC425: 2.7 oz (0.08 L) Engine model GX25T UMC435: 3.3 oz (0.10 L) Engine description code GCALT Refer to page 13. Engine type 4-stroke, overhead cam, single Spark plug CMR5H (NGK)

  • Page 24: Consumer Information

    Honda Power Equipment dealership personnel are trained professionals. They should be able to answer any question you may To find an authorized Honda Servicing Dealer anywhere in the have. If you encounter a problem that your dealer does not solve to United States, visit our web site: http:// your satisfaction, please discuss it with the dealership’s...

This manual is also suitable for:

Umc425

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