Owner’s Manual Water Pump Model CW15 Model ST20 Model Number Serial Number www.generac.
WARNING! California Proposition 65 Engine exhaust and some of its constituents are known to the state of California to cause cancer, birth defects, and other reproductive harm. WARNING! California Proposition 65 This product contains or emits chemicals known to the state of California to cause cancer, birth defects, and other reproductive harm.
Table of Contents Section 1 - Introduction 1.1 - Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Section 2 - Safety 2.1 - Safety Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Section 3 - General Information 3.1 - Know Your Water Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.
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Section 1 Introduction 1.1 — INTRODUCTION Thank you for purchasing this water pump manufactured by Generac Power Systems, Inc. This is a high performance, air-cooled, engine-driven water pump that operates at 80 or 158 GPM depending on model. 1.1.1 — Where to Find Us You can contact Generac Customer Service by phone at 1-888-436-3722, or on the internet at www.generac.com. Record model and serial number of unit on front cover for future reference and/or service inquiries.
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Section 2 Safety 2.1 — SAFETY RULES Throughout this publication, and on tags and decals affixed to the water pump, DANGER, WARNING, CAUTION and NOTE blocks are used to alert personnel to special instructions about a particular operation that may be hazardous if performed incorrectly or carelessly. Observe them carefully.
Safety 2.1.1 — Exhaust Hazards • DO NOT touch hot parts and AVOID hot exhaust gases. • Allow equipment to cool before touching. Carbon monoxide produced during use can kill in minutes. NEVER use indoors, in a vehicle, or in other sheltered areas, EVEN IF doors and windows are open. Only use OUTSIDE and far away from windows, doors and vents. • Operate water pump ONLY outdoors. • A running engine gives off carbon monoxide. • Carbon monoxide is an odorless, colorless, poisonous gas.
Safety • DO NOT pump chemicals or flammable liquids, such as fuel, or fuel oils. • Reflective exhaust heat may damage the fuel tank, causing fire. Keep at least 5 feet of clearance on all sides of the pump for adequate cooling, maintenance, and servicing. • DO NOT use to pump fluid intended for human consumption. • Secure the pump. Loads from the hoses may cause it to tip over. • DO NOT stop the engine by moving the choke lever to the CHOKE position. 2.1.
Safety 2.1.10 — Splash Hazards Risk of eye injury. Spray can splash back or propel objects. • Always wear safety goggles when using this equipment or in vicinity of where equipment is in use. • Before starting the water pump, be sure you are wearing adequate safety goggles. • NEVER substitute safety glasses for safety goggles. NOTE: Improper treatment of water pump can damage it and shorten its life. • If you have questions about intended use, ask dealer or contact qualified service center.
Section 3 General Information 3.1 — KNOW YOUR WATER PUMP Read this owner’s manual and safety rules before operating your water pump. If you loan this device to someone, ALWAYS loan these instructions AND the owner’s manual to the individual as well. Compare the illustrations with your water pump to familiarize yourself with the locations of various controls (Figure 3-1). Save this manual for future reference. Replacement owner’s manuals can be printed from the Generac Web site.
General Information I L A M H G B J C D K F E Q Figure 3-2. CW15 Features and Controls V U T S R W X Y Figure 3-3.
General Information 3.2 — PRODUCT SPECIFICATIONS Model CW15K ST20K Flow Rate (GPM / LPM) 80/303 158/598 Suction/Discharge Diameter (Inches/mm) 1.5/40 2/50 Total Head (feet/meter) 80/24.4 108/32.9 Suction Head (feet/meter) 26/7.9 26/7.9 Suction Hose Length (feet/meters) 10/3.1 12/3.7 Discharge Hose Length (feet/meters) 25/7.6 25/7.6 Engine Displacement (Cubic Inch/cc) 4.8/79 12.7/208 E6RTC or Equivalent F6RTC or Equivalent Spark Plug Type Spark Plug Gap (Inches/mm) 0.028-0.
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Section 4 Set-up 4.1 — ASSEMBLY Read entire operator’s manual before you attempt to assemble or if you have any problems with the assembly of your water pump, please call Generac Customer Service at 1-888-436-3722. When calling for assistance, please have the model and serial number from the data tag available. If the water pump does not include a wheel kit, skip to “Add Engine Oil”.
Set-up 4.2 — ADD ENGINE OIL 1. Place water pump on a flat, level surface. 2. Clean area around oil fill and remove ORANGE oil fill cap/dipstick. 3. Using oil funnel, slowly pour oil into fill opening. See “Maintenance” section for oil type recommendation. 4. Check periodically until the oil level is between “L” and “H” on the dipstick (Figure 4-4). Do not overfill. Fuel and its vapors are extremely flammable and explosive. Fire or explosion can cause severe burns or death. 4.3.
Set-up 4.4 — CONNECT SUCTION AND DISCHARGE HOSE 4. Attach the filter to the suction hose by inserting the barb end into the suction hose and securing with a hose clamp. Then attach the filter end (Figure 4-8). 1. Attach and thread a gasket and hose barb to each of the threaded flanges using a hose nut (Figure 4-6). Figure 4-8. Attach Filter 4.5 — PRIME THE UNIT Remove the Easy Prime cap from the pump and completely fill the pump chamber with clean water. Tighten the cap. DO NOT over tighten.
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Section 5 Operation 5.1 — OPERATION If you have any problems operating your water pump, please call Generac customer service at 1-888-436-3722. 5.2 — WATER PUMP LOCATION 5.2.1 — Clearances and Air Movement 5 Foot Minimum Running engine gives off carbon monoxide, an odorless, colorless, poisonous gas. Breathing carbon monoxide can cause headache, fatigue, dizziness, vomiting, confusion, seizures, nausea, fainting or death. For more information, reference the CO warnings in the “Safety” section.
Operation Route the suction hose so that the filter is immersed completely in the water supply source. DO NOT operate pump without the filter fully immersed. DO NOT operate the pump without the filter attached to the hose. Secure the suction hose to keep it from moving once the Water Pump is turned on. 6. When engine starts, slowly move choke lever to RUN position as engine warms. If engine falters, move choke lever to CHOKE position, then back to RUN position. 7.
Operation • Replacement parts must be the same and installed in the same position as the original parts. Starter cord kickback (rapid retraction) can result in bodily injury. Broken bones, fractures, bruises, or sprains could result. 6. When starting engine, grasp starter grip handle and pull slowly until you feel some resistance. Then pull rapidly to start engine. 7. Return starter grip handle slowly. DO NOT let rope “snap back” against starter. 8.
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Section 6 Maintenance 6.1 — MAINTENANCE RECOMMENDATIONS 6.2 — MAINTENANCE SCHEDULE Regular maintenance will improve the performance and extend the life of the water pump. See any qualified dealer for service. Follow the hourly or calendar intervals, whichever occurs first. More frequent service is required when operating in adverse conditions. The water pump’s warranty does not cover items that have been subjected to operator abuse or negligence.
Maintenance 6.4 — WATER PUMP MAINTENANCE 6.4.1 — Clean Debris Daily or before use, clean accumulated debris from water pump. Keep linkage, spring and controls clean. Keep area around and behind muffler free from any combustible debris. Inspect cooling air slots and openings on the water pump. These openings must be kept clean and unobstructed. Outdoor temperatures determine the proper oil viscosity for the engine. Use the chart to select the best viscosity for the outdoor temperature range expected.
Maintenance 6.8.2 — Adding Engine Oil 1. Make sure water pump is on a flat, level surface. 2. Check oil level as described in Checking Oil Level. 3. If needed, slowly pour oil into oil fill opening until the proper level on the dipstick is reached. 4. Insert the dipstick into filler neck but do not screw it in. 5. If level is low, fill until the oil level is between “L” and “H” on the dipstick (Figure 6-2). 6. Replace and tighten oil fill cap. 5.
Maintenance FOAM FILTER ELEMENT AIR CLEANER COVER AIR CLEANER SCREWS Figure 6-7. Spark Plug Gap 6.11 — AFTER EACH USE Figure 6-5. Service the CW15 Air Cleaner FOAM FILTER ELEMENT AIR CLEANER COVER AIR CLEANER SCREW Figure 6-6. Service the ST20 Air Cleaner 6.10 — SERVICE SPARK PLUG Changing the spark plug will help your engine to start easier and run better. 1. Clean area around spark plug. 2. Remove and inspect spark plug. 3.
Maintenance There is no need to drain gasoline from the engine if a fuel stabilizer is added according to instructions. Run the engine for 2 minutes to circulate the stabilizer throughout the fuel system. The engine and fuel can then be stored up to 24 months. If gasoline in the engine has not been treated with a fuel stabilizer, it must be drained into an approved container. Run the engine until it stops from lack of fuel.
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Section 7 Troubleshooting 7.1 — TROUBLESHOOTING GUIDE PROBLEM CAUSE CORRECTION 1. Air leak in suction hose. Pump will not pump. 2. The suction and/or discharge line(s) may be blocked. 3. The end of the suction line is not submerged. 4. Total head is too high for this pump to work against 1. Make sure suction hose is double clamped at joints, clamps are tight, fittings have thread compound and are tight, with no nicks or cuts in hose. 2. Check to see that the hoses and filter are in good working order.
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Part No. 0K9077 Rev A 10/02/14 © Generac Power Systems, Inc. All rights reserved Specifications are subject to change without notice. No reproduction allowed in any form without prior written consent from Generac Power Systems, Inc. Generac Power Systems, Inc. S45 W29290 Hwy. 59 Waukesha, WI 53189 1-888-GENERAC (1-888-436-3722) generac.
