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How to Replace the Spark Plug 

Check the gap (A) with a wire gauge (B). If necessary, reset the gap. Install and tighten the spark plug to the 

recommended torque. For gap setting or torque, see the Specifications section. 

Note: In some areas, local law requires using a resistor spark plug to suppress ignition signals. If this engine was 

originally equipped with a resistor spark plug, use the same type for replacement. 

Inspect Muffler and Spark Arrester 

WARNING 

Running engines produce heat. Engine parts, especially muffler, become 

extremely hot. 

Severe thermal burns can occur on contact. 

Combustible debris, such as leaves, grass, brush, etc. can catch fire. 

.Allow muffler, engine cylinder and fins to cool before touching. 
· Remove accumulated debris from muffler area and cylinder area. 

WARNING:

 

Replacement parts must be the same and installed in the same position as the original parts or 
fire could result. 

How to Service the Air Filter (see figure 3) 

1. Remove the air cleaner outside cover (A). Be careful to prevent dirt and debris from falling into the air cleaner 

assembly. 

2. Separate the Air Filter (A) from the Air Filter Housing (B). 

3. Inspect the air filter. Clean dirty air filter with warm water and mild soap. Allow air filter to dry thoroughly before 

re-installation 

4. Install the air filter assembly onto the carburetor and secure with screw. 

Note:

 

Do not use pressurized air or solvents to clean the filter. Pressurized air can damage the filter and solvents 

will dissolve the filter. 

Figure 4 

Figure 3 

9

Summary of Contents for 190F

Page 1: ...420CC ENGINE OWNER S MANUAL 45752 ...

Page 2: ...nual to become familiar with this product before you begin using it This Engine is designed for certain applications only The distributor cannot be responsible for issues arising from modification We strongly recommend this Engine not be modified and or used for any application other than that for which it was designed If you have any questions relative to a particular application DO NOT use the E...

Page 3: ...d result in damage to the engine This manual contains safety information to make you aware of Shock Slow Stop Fast the hazards and risks associated with engines and how to avoid them Because we do not necessarily know what equipment this engine will power it is important that you read and understand these instructions and the instructions for the equipment this engine powers WARNING We do not appr...

Page 4: ... yourself with the location of various features and controls 3 Air cleaner Muffler Spark plug Throttle lever Recoil starter Starting handle Fuel shutoff Choke lever Fuel filler cap Fuel tank Engine identification Dipstick Drain plug A B C D E F G H I J K L A B C D E F G H I J K L ...

Page 5: ...ion can result Operate equipment with guards in place Keep hands and feet away from rotating parts Tie up long hair and remove jewelry Do not wear loose fitting clothing dangling drawstrings or items that could become caught WARNING Engines give off carbon monoxide an odorless colorless poison gas engine starts WHEN OPERATING EQUIPMENT Do not choke carburetor to stop engine WHEN TRANSPORTING EQUIP...

Page 6: ...hoke lever J the choke position Note Choke is usually unnecessary when restarting a warm engine 4 5 6 Move Throttle lever D away from MIN position about 1 3 of way toward MAX position Turn the Engine switch F to the ON position Recoil Start Firmly hold the starting handle H Pull the starter cord handle slowly until resistance is felt the pull rapidly WARNING Rapid retraction of the starter cord ki...

Page 7: ...it Check the spacing on the electrode and set the gap to the correct dimension See Maintenance Section If plug is damaged replace with a new spark plug Ensure the spark plug is installed and wire is connected Warning Do not crank engine with spark plug removed Oil Oil Recommendations We recommend the use of suitable oils for best performance Other high quality detergent oils are acceptable if clas...

Page 8: ...ystem from gum formation mix a fuel stabilizer into the fuel See Storage All fuel is not the same This engine is certified to operate on gasoline The emissions control system for this engine is EM Engine Modifications High Altitude At altitudes over 5 000 feet 1524 meters a minimum 85 octane 85 AKI 89 RON gasoline is acceptable To remain emissions compliant high altitude adjustment is required Ope...

Page 9: ... amputation or laceration Fire hazard Before performing adjustments or repairs Disconnect the spark plug wire and keep it away from the spark plug Use only correct tools Do not tamper with governor spring links or other parts to increase engine speed Replacement parts must be the same and installed in the same position as the original parts Do not strike the flywheel with a hammer or hard object b...

Page 10: ...w muffler engine cylinder and fins to cool before touching Remove accumulated debris from muffler area and cylinder area WARNING Replacement parts must be the same and installed in the same position as the original parts or fire could result How to Service the Air Filter see figure 3 1 Remove the air cleaner outside cover A Be careful to prevent dirt and debris from falling into the air cleaner as...

Page 11: ...age to the electrical system or a fire could result 1 2 3 Remove the 6x12mm screw from the rear cover of the engine switch box Remove the fuse cover then pull out and inspect the fuse Reinstall the rear cover Install the 6x12mm screw and tighten How to Service the Battery see figure 7 if applicable WARNING Be careful not to connect the battery in reverse polarity as this will short circuit the bat...

Page 12: ...may result in white smoke emission from muffler Note Storing or transporting with the spark plug down will result in hard starting and or engine smoking Store in a clean dry area When removing unit from storage only use fresh gasoline Perform operation checks see maintenance schedule before starting engine 11 Engine power will decrease 3 5 for each 1 000 feet 300 meters above sea level and 1 for e...

Page 13: ...GE The emissions control system is warranted for two years If any emissions related part on your engine is defective the part will be repaired or replaced by Northern Tool and Equipment Company Inc OWNER S WARRANTY RESPONSIBILITIES As the NRSI ENGINE owner you are responsible for the performance of the required maintenance listed in your owner s manual Northern Tool and Equipment Company Inc recom...

Page 14: ...al is warranted for the warranty period stated above If the part fails during the period of warranty coverage the part will be repaired or replaced by Northern Tool and Equipment Company Inc according to Subsection d below Any such part repaired or replaced under warranty will be warranted for the remainder of the period b Any warranted part that is scheduled only for regular inspection in your Ow...

Page 15: ...ts that are not exempted by the U S EPA may not be used The use of any non exempted add on or modified parts by the ultimate purchaser will be grounds for disallowing a warranty claims Northern Tool and Equipment Company Inc will not be liable to warrant failures of warranted parts caused by the use of a non exempted add on or modified part k The manufacturer issuing the warranty shall provide any...

Page 16: ...k plug b Ignition coil 4 Catalytic Muffler Assembly including a Muffler gasket b Exhaust manifold c Catalytic converter 5 Crankcase Breather Assembly including a Breather connection tube 6 Fuel tank evaporative emissions control system including a Purge Valves b Carbon Canister c Canister Mounting Brackets d Fuel Cap 7 Miscellaneous items Used in Above Systems including a Switches b Hoses belts co...

Page 17: ...es to the original purchaser of the equipment and is non transferable Verification of purchase is the responsibility of the buyer Parts will be replaced or repaired at no charge except when the equipment has failed due to lack of proper maintenance Any misuse abuse alteration or improper installation or operation will void warranty Determining whether a part is to be replaced or repaired is the so...

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