Harbor Freight Tools 69738 User Manual - Page 14

Air Filter Element Maintenance Safety 1. Remove the air filter cover and the air filter elements and check for dirt. Clean or replace as described below. 2. Cleaning: • For "paper" filter elements: To prevent injury from dust and debris, wear ANSI-approved safety goggles, NIOSH‑approved dust mask/respirator, and heavy-duty work gloves. In a well-ventilated area away from bystanders, use pressurized air to blow dust out of the air filter. If this does not get the filter clean, replace it. • For foam filter elements: Wash the element in warm water and mild detergent several times. Rinse. Squeeze out excess water and allow it to dry completely. Soak the filter in lightweight oil briefly, then squeeze out the excess oil. 3. Install the new filter or the cleaned filter. Secure the Air Cleaner Cover before use. Spark Plug Maintenance Setup Spark Plug Cap 1. Disconnect spark plug cap from 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 electrode has deposits on it, polish it using emery paper. If the white insulator is cracked or chipped, the spark plug needs to be replaced. NOTICE: Use only the spark plug listed on the Technical Specifications chart. Using an incorrect spark plug may damage the engine. 4. When installing a new spark plug, adjust the plug's gap to the specification on the Technical Specifications chart. Do not pry against the electrode, the spark plug can be damaged. 5. Install the new spark plug or the cleaned spark plug into the engine. Gasket-style: Finger-tighten until the gasket contacts the cylinder head, then tighten about 1/2-2/3 turn more. Non-gasket-style: Finger-tighten until the plug contacts the head, then tighten about 1/16 turn more. NOTICE: Tighten the spark plug properly. If loose, the spark plug will cause the engine to overheat. If overtightened, the threads in the engine block will be damaged. 6. Apply dielectric spark plug boot protector (not included) to the end of the spark plug and reattach the wire securely. Operation Belt Tension Adjustment 1. Turn off engine. 2. Loosen, but do not remove, the four Nuts (21) that hold the Engine (16) to the Connecting Plates (23). 3. Slide the Engine (16), away from the Driver Pulley (47), until the belts are properly tensioned. 4. Tighten the four Nuts (21) that hold the Engine (16) to the Connecting Plates (23). Maintenance Belt Replacement 1. Turn off engine. 2. Loosen, but do not remove, the four Nuts (21) that hold the Engine (16) to the Connecting Plates (23). 3. Using Nut (43) and Bolt (42), slide the Engine (16) towards the Driver Pulley (47) until Belts (20) can be removed. 4. Remove the old Belts, then install new ones. 5. Check the alignment of the two pulleys (side by side - in the same level/surface). 6. Using Nut (43) and Bolt (42), slide Engine (16) away from Driver Pulley (47) until Belt is properly tensioned. 7. Re-tighten the four Nuts (21) that hold the Engine (16) to the Connecting Plates (23). Page 14 For engine technical questions, please call 1-800-520-0882. For other technical questions, please call 1-800-444-3353. Item 69738