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See figure 17. Turn the crank clockwise to raise the nozzle. Turn the crank counterclockwise to lower. CARBURETOR ADJUSTMENT A WARNING: If any adjustments are made to the engine while the engine is running (e.g. carburetor), keep clear of all moving parts. Be careful of heated surfaces and muffler. FIGURE 17. Minor carburetor adjustment may be required to compensate for differences in fuel, temperature, altitude or load. NOTE: A dirty air cleaner will cause engine to run rough. Be certain air cleaner is clean and attached to the carburetor before adjusting carburetor. Do not make unnecessary adjustments. Factory settings are satisfactory for most applications and conditions. If adjustment is needed, refer to the separate engine manual packed with your vacuum. CLUTCH ROD ADJUSTMENT (Self-Propelled Models Only) To adjust the clutch rod, refer to step numbers 3 and 4 under “Attaching the Clutch Rod” in Assembly Instructions. MAINTENANCE A WARNING: Always stop engine and disconnect spark plug wire before cleaning, lubricating or performing any repairs or maintenance. LUBRICATION Wheels—Rear wheels are provided with light oil bearings. Place a few drops of SAE 30 oil on each bearing once a season. 7 I Gear Box (Self-Propelled Models Only)—The gear box is lubricated with 3 ounces of High Ternf. (450° F.) grease. Order part number 737-0223. Peri Ddically check lubricant level by removing the two self-tapping screws on the gear box cover and lifting off the cover. Do not change grease; simply add if necessary. ENGINE Refer to the separate engine manual for engine maintenance instructions. Maintain engine oil as instructed in the separate engine manual packed with your unit. Read an j follow instructions carefully. Service air cleaner every 25 hours under normal conditions. Clean every few hours under extremely dusty conditions. Poor engine performance and f ooding usually indicates that the air cleaner should be serviced. To service the air cleaner, refer to the ssparate engine manual packed with your unit. p reset recom-engine ions. The spark plug should be cleaned and the ge once a season. Spark plug replacement is mended at the start of each season; check manual for correct plug type and gap specifical Clean the engine regularly with a cloth or brusi the cooling system (blower housing area) c permit proper air circulation which is esse engine performance and life. Be certain to ren dirt and combustible debris from muffler area. l. Keep lean to ntial to love all BELT REPLACEMENT (Self-Propelled Model: ; Only) 1. Remove the nozzle or impeller guard from front of blower housing. 2. Remove hex bolt and lock washer from c jnter of impeller. See figure 18. A 9/16" socket wrench with extension is needed. 3. 4. Remove hand knob and cupped washer f om top of housing. Remove two self-tapping screws which \ old the belt guard. See figure 19. A 3/8" wronch is required. Lift off belt guard. FIGURE 19. 5. Slide belt off the impeller pulley. Slide housing and impeller off engine crankshaft. Be careful to not lose square key. See figure 20. Engine Crankshaft P.T.O.- Pulley FIGURE 20. Square Key 6. Slide impeller and blower housing assemblies off crankshaft. 7. Remove belt from P.T.O. pulley and install new belt. See figure 20. NOTE: When reassembling the new belt, the aid of another person will be helpful. 8. Turn the crankshaft until the keyway on shaft is directly on top. While holding housing assembly and impeller assembly, line up the keyway on the pulley with the key on the crankshaft, and slide housing and impeller assemblies onto crankshaft. 9. Secure impeller to crankshaft with hex bolt and lock washer, removed in step 2. Tighten securely. 10. Slip belt over impeller pulley. Reassemble the belt guard. 11. Secure blower housing with hand knob and washer. 12. Reassemble the nozzle or impeller guard. 8 OFF-SEASON STORAGE The following steps should be taken to prepare your vacuum for storage. 1. Clean and lubricate the vacuum thoroughly as described in the lubrication instructions. 2. Refer to engine manual for correct engine storage instructions. 3. If storing in an unventilated or metal storage shed, coat metal parts with a light oil or silicone to prevent rust. 4. Store in a dry, clean area. Do not store next to corrosive materials, such as fertilizer. OPTIONAL EQUIPMENT" Hose Attachment Kit Model 290-204-000 is available as optional equipment. See figure 21. Hose Attachment Kit FIGURE 21. TROUBLE SHOOTING PROBLEM POSSIBLE CAUSE(S) CORRECTIVE ACTION Engine fails to start 1. Fuel tank empty, or stale fuel. 2. Spark plug wire disconnected. 3. Faulty spark plug. 1. Fill tank with clean, fresh fuel. 2. Connect wire to spark plug. 3. Clean, adjust gap or replace. Loss of power; operation erratic 1. Spark plug wire loose. 2. Unit running on CHOKE. 3. Blocked fuel line (if so equipped) or stale fuel. 4. Water or dirt in fuel system. 5. Carburetor out of adjustme...

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