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For technical questions, please call 1-800-1-800-444-3353.

Item 69735 

        

SAFETY

Op
ERA
TION

M

AINTENANCE

SETU
p

Maintenance

WARNING

TO pREVENT SERIOUS INJURY FROM ACCIDENTAL STARTING: 

Turn the power Switch of the equipment to its “OFF” position, wait for the engine to cool, and disconnect 

the spark plug cap before performing any inspection, maintenance, or cleaning procedures.
TO pREVENT SERIOUS INJURY FROM EQUIpMENT FAILURE: 

Do not use damaged equipment.  If abnormal noise, vibration, or excess 

smoking occurs, have the problem corrected before further use.
Follow all service instructions in this manual.  The engine may fail critically if not serviced properly.

Many maintenance procedures, including any not detailed in this manual, will need to be 

performed by a qualified technician for safety.  If you have any doubts about your ability to safely 

service the equipment or engine, have a qualified technician service the equipment instead.

Cleaning, Maintenance, and Lubrication Schedule

Note:

 This maintenance schedule is intended solely as a general guide.  If performance decreases or if 

equipment operates unusually, check systems immediately.  The maintenance needs of each piece of equipment 

will differ depending on factors such as duty cycle, temperature, air quality, fuel quality, and other factors.

Note:

 The following procedures are in addition to the regular checks and maintenance 

explained as part of the regular operation of the engine and equipment.

procedure

Before 

Each Use

Monthly or 

every 20 

hr. of use

Every 3 mo. or 

50 hr. of use

Every 6 mo. or 

100 hr. of use 

Yearly or  

every 300 

hr. of use

Every 

2 Years

Brush off outside of engine
Check engine oil level
Check air cleaner
Check deposit cup
Change engine oil
Clean/replace air cleaner

*

Check and clean spark plug
1.  Check/adjust idle speed
2.  Check/adjust valve clearance
3.  Clean fuel tank, strainer 

and carburetor

4.  Clean carbon build-up from 

combustion chamber

**

**

Replace fuel line if necessary

**

*

Service more frequently when used in dusty areas.

**

These items should be serviced by a qualified technician.

Summary of Contents for 346cc

Page 1: ......

Page 2: ...d CARB compliant Cooling System Forced air cooled Fuel Type 87 octane unleaded gasoline Capacity 1 Gallon Engine Oil Type SAE 10W 30 above 32 F 5W30 at 32 F or below Capacity 1 16 Quart Run Time 50 Lo...

Page 3: ...Eye Injury Wear ANSI approved safety goggles with side shields Read the manual before set up and or use WARNING marking concerning Risk of Hearing Loss Wear hearing protection Symbol property or Stat...

Page 4: ...e Engine 8 Secure the Engine on transport vehicles to prevent the tool from rolling slipping and tilting 9 Industrial applications must follow OSHA requirements 10 Do not leave the equipment unattende...

Page 5: ...e for which it is not intended Service precautions 1 Before service maintenance or cleaning a Turn the engine switch to its OFF position b Allow the engine to completely cool c Then remove the spark p...

Page 6: ...can start fires around dry vegetation A spark arrestor may be required The operator should contact local fire agencies for laws or regulations relating to fire prevention requirements The emission co...

Page 7: ...e Kit Installation Instructions 1 Turn off the engine 2 Close the fuel valve 3 Place a bowl under the fuel cup to catch any spilled fuel 4 Unthread the bolt holding the fuel cup CAUTION Carburetor bow...

Page 8: ...unning the engine with no or low engine oil WILL permanently damage the engine 1 Make sure the engine is stopped and is level 2 Close the Fuel Valve 3 Clean the top of the Dipstick and the area around...

Page 9: ...gasoline containing more than 10 ethanol E10 Do not use E85 ethanol Note Do not use gasoline that has been stored in a metal fuel container or a dirty fuel container It can cause particles to enter t...

Page 10: ...elsewhere on the tool which functions the same as the Throttle Use the Speed Control Lever in place of the Throttle when the tool is so equipped 4 Turn the Engine Switch on 5 Grip the Starter Handle...

Page 11: ...to ensure proper equipment and engine operation b The operational break in period will last about 3 hours of use During this period Do not apply a heavy load to the equipment Do not operate the engin...

Page 12: ...instead Cleaning Maintenance and Lubrication Schedule Note This maintenance schedule is intended solely as a general guide If performance decreases or if equipment operates unusually check systems im...

Page 13: ...e before starting engine To prevent FIRE do not start the engine while the smell of fuel hangs in the air Engine Oil Change CAUTION Oil is very hot during operation and can cause burns Wait for engine...

Page 14: ...rom end of plug Clean out debris from around spark plug 2 Using a spark plug wrench remove the spark plug 3 Inspect the spark plug If the electrode is oily clean it using a clean dry rag If the electr...

Page 15: ...next to the bowl and allow the fuel to drain from there as well d Open the fuel valve After all fuel has drained reinstall the drain bolt and sediment cup if equipped Tighten securely 3 LUBRICATION a...

Page 16: ...r with screwdriver handle 8 Turn Choke to RUN position Remove spark plug and pull the start handle several times to air out the chamber Reinstall spark plug and set Choke to START position 9 Replace F...

Page 17: ...oline Do not use gasoline with more than 10 ethanol E15 E20 E85 etc 3 Test replace fuel tank cap 4 Have qualified technician service magneto 5 Secure spark plug cap Engine stops when under heavy load...

Page 18: ...t Some states do not allow the exclusion or limitation of incidental or consequential damages so the above limitation of exclusion may not apply to you THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER...

Page 19: ...hip that cause the failure of warranted parts for a period of two 2 years after the date of delivery to the first retail purchaser 2 No Charge Repair or Replacement Repair or replacement of any warran...

Page 20: ...irst 1 48 Ring The Second 1 49 Camshaft Asm 1 50 Valve Intake 1 51 Valve Exhaust 1 52 Seat Valve Spring 1 53 Retainer Exhaust Valve 1 54 Rotator Valve 1 part Description Qty 55 Guide Seal 1 56 Lifter...

Page 21: ...19 22 23 28 25 20 21 29 24 15 27 42 65 67 94 95 96 97 103 100 102 104 105 106 107 40 41 16 26 9 3 20 21 26 26 26 27 30 33 31 34 32 34 35 35 35 35 35 35 35 36 37 38 39 43 45 46 48 49 51 50 53 54 55 56...

Page 22: ...CT THE MANUFACTURER AND OR DISTRIBUTOR EXPRESSLY STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSED TECHNICIANS AND NOT BY THE BUYER THE BUYER ASSUMES ALL RI...

Page 23: ...AFETY OpERATION MAINTENANCE SETUp power Take Off Diagram Note Not to scale 3 48 in 88 5mm 1 17 in 29 7mm 2 84 in 72 2mm 2 2 in 56mm 1 1 in 28mm 3 8 24UNF 1 in 25 4mm 0 36 in 9 13mm 0 25 in 6 35mm 30 3...

Page 24: ...3491 Mission Oaks Blvd PO Box 6009 Camarillo CA 93011 800 520 0882 www harborfreight com...

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