FORM NO. 3318–918 ProLine 121cc Two-cycle Vertical Shaft Engine Part No. 61–8062 – 790001 & Up Operator’s Manual IMPORTANT: Read this manual carefully. It contains information about your safety and the safety of others. Also become familiar with the controls and their proper use before you operate the product.
Introduction We want you to be completely satisfied with your new product, so feel free to contact your local Authorized Service Dealer for help with service, genuine replacement parts, or other information you may require. Whenever you contact your Authorized Service Dealer or the factory, always know the model of your product. This number will help the Service Dealer or Service Representative provide exact information about your specific product.
Contents Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . Technical Data . . . . . . . . . . . . . . . . . . . . . . General Engine Specifications . . . . . . . . . . Engine Feature Locations . . . . . . . . . . . . . . Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Starter Rope Configuration for Zone-start Applications . . . . . . . . . . . . . . Starter Rope Configuration for Non-zone-start Applications . . . . . . . . . . Installing the Spark Plug Protector . .
Specifications* Technical Data (Dimensions in Inches) Front View Front Rotation Crankshaft Figure 1 *Specifications subject to change without notice.
Specifications General Engine Specifications Engine Type . . . . . . . . . . . Air-cooled, Two-cycle, 3rd Port Induction, Vertical Shaft Engine Feature Locations 2 1 Displacement . . . . . . . . . . . . . . . . . . . . . . . . 121 cc Bore x Stroke . . . . . . . . . . . . . . . . 2.283” x 1.811” (58 mm x 46 mm) Ignition System . . . . . . . . . . . . . . . . . . . Solid State Spark Plug . . . . . . . . . . . . . . . . . . NGK BPMR4A 0.032” (0.8 mm) gap Governor . . . . . . . . . . . . . . .
Installation Check the position of the recoil start on the engine being replaced. Note that this replacement engine is assembled for zone-start blade applications. Starter Rope Configuration for Zone-start Applications 1. Starter Rope Configuration for Non-zone-start Applications 1. Remove the recoil assembly (Fig 4). 2. Rotate the recoil assembly 90 degrees clockwise, then reassemble the recoil assembly to the engine (Fig 4). Insert the starter rope into the rope guide (Fig. 3). 1 1 2 Figure 4 1.
Installation Installing the Spark Plug Protector For European Applications • A muffler guard extension is attached to the muffler. This is a European safety requirement and is not necessary for USA applications (Fig. 2). • A fuel decal is provided to be affixed over the existing fuel decal. USA purchasers may discard this decal. Fasten the spark plug protector to the engine using the self-tapping screws provided with the engine (Fig 2). 1 2 3 Figure 5 1. Self-tapping Screw (2) 2.
Operation Approved Oils and Mixing Ratios Your two-cycle engine requires a mixture of gasoline and oil. Failure to use the correct oils and mixture will result in serious engine damage. For simplicity and best engine performance, mix the contents of one 5.2-ounce bottle of Toro Two-cycle Oil with two gallons of fresh, unleaded regular gasoline. Leaded regular gasoline can be used if unleaded regular is not available.
Operation Mixing Gasoline and Oil POTENTIAL HAZARD • In certain conditions gasoline is extremely flammable and highly explosive. WHAT CAN HAPPEN • A fire or explosion from gasoline can burn you, others, and cause property damage. HOW TO AVOID THE HAZARD • Use a funnel and fill the fuel tank outdoors, in an open area, when the engine is cold. Wipe up any gasoline that spills. • Do not fill the fuel tank completely full.
Operation Filling the Fuel Tank Starting the Engine 1. Pull the spark plug wire off of the spark plug (Fig. 7). 2. Clean around the fuel cap before removing the cap. 3. Remove the fuel tank cap and fill the fuel tank with the gasoline/oil mix to within 1/4 inch (6 mm) of the top of the tank, not into the filler neck. DO NOT OVERFILL THE TANK. 4. POTENTIAL HAZARD • Clothing and body parts can get caught in moving parts on the engine and equipment.
Maintenance Service Interval Chart Service Operation Each Use 25 Hours Service Air Cleaner X Remove and Check/Replace Spark Plug X Clean Cooling System 75 Storage Hours Service Notes Clean more frequently in dusty or dirty conditions X Clean Muffler Pipe and Exhaust Port X Drain Gasoline X Before Performing Any Maintenance POTENTIAL HAZARD • If you leave the wire on the spark plug, someone could start the engine. Stop the engine and pull the spark plug wire off of the spark plug (Fig. 7).
Maintenance Servicing the Air Cleaner Normally clean the air cleaner after every 25 operating hours. More frequent cleaning is required when the engine is operated in dusty or dirty conditions. 1. Make sure the spark plug wire is disconnected from the spark plug (Fig. 9). 2. Lift the tab at the top of the air cleaner and pivot the air cleaner cover down. Clean the cover thoroughly (Fig. 9). 3.
Maintenance Replacing the Spark Plug Cleaning the Cooling System Use an NGK BPMR4A spark plug or equivalent. The correct air gap is 0.032” (0.8 mm). Remove the plug after every 25 operating hours and check its condition. Cleaning the cooling system ensures correct cooling, best engine performance and maximum engine life. 1. 2. Stop the engine and pull the spark plug wire off of the spark plug. Clean around the spark plug and remove the plug from the cylinder head. 1.
Maintenance Cleaning the Muffler Pipe and Exhaust Port POTENTIAL HAZARD • Muffler and engine surfaces become hot during operation. 3. Remove the hex head screw, then remove the muffler from the engine (Fig. 12). 4. Make sure the spark plug wire is off of the spark plug, then slowly pull the starter rope until the piston covers the exhaust port (Fig. 13). 5. Clean the carbon from the exhaust port with a flat, hardwood scraper (Fig. 13).
Maintenance Draining the Gasoline POTENTIAL HAZARD • If gasoline is spilled on a hot engine, it could ignite. WHAT CAN HAPPEN • Contact with burning gasoline could cause serious personal injury. HOW TO AVOID THE HAZARD • Drain gasoline from a cold engine only. 1. Shut off the engine and allow it to cool. If You Leave the Gasoline in the Tank Fuel can be left in the gas tank only if a fuel additive such as Toro’s Stabilizer/Conditioner is added to the gasoline and run through the engine before storing.
Walk Mowers THE TORO PERFORMANCE WARRANTY A Full Warranty (Limited Warranty for Commercial Use) What Is Covered By This Express Warranty? What Must You Do To Keep The Warranty In Effect? The Toro Company promises to repair any TORO Product used for normal residential purposes* if defective in materials or workmanship or if it stops functioning due to the failure of a component.
