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Safety • Operation • Maintenance • Storage • Troubleshooting
OPERATOR'S MANUAL
139cc and 173cc
Vertical Shaft OHV Engines
for Walk Behind Mowers
IMPORTANT:
READ SAFETY RULES AND INSTRUCTIONS CAREFULLY BEFORE OPERATION
769-03899A
PRINTED IN U.S.A.
MTD Products Ltd., P. O. Box 1386, KITCHENER, ONTARIO N2G 4J1
04.10.09
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Summary of Contents for MTD 139cc
- Page 1 Safety • Operation • Maintenance • Storage • Troubleshooting OPERATOR’S MANUAL 139cc and 173cc Vertical Shaft OHV Engines for Walk Behind Mowers IMPORTANT: READ SAFETY RULES AND INSTRUCTIONS CAREFULLY BEFORE OPERATION 769-03899A PRINTED IN U.S.A. MTD Products Ltd., P. O. Box 1386, KITCHENER, ONTARIO N2G 4J1 04.10.09...
- Page 2 This Operator’s Manual may cover a range of engine models. Characteristics and features discussed and/or illustrated in this manual may not be applicable to all engine models. MTD LLC reserves the right to change product specifications, designs, and equipment without notice and without incurring obligation.
- Page 3 WARNING: Engine Exhaust, some of its constituents, and certain vehicle components contain or emit chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. DANGER: This machine was built to be operated according to the rules for safe operation in this manual. As with any type of power equipment, carelessness or error on the part of the operator can result in serious injury.
- Page 4 3. Always be sure of your footing. A slip and fall can cause serious 13. To reduce fire hazard, keep mower free of grass, leaves, or personal injury. If you feel you are losing your balance, release other debris build-up. Clean up oil or fuel spillage and remove the blade control handle immediately, and the blade will stop any fuel soaked debris.
- Page 5 Know Your Engine Fuel Cap Fuel Cap Operating Air Cleaner Air Cleaner Starter Starter Grip Grip Your Oil Fill Cap Oil Fill Cap Engine Oil Drain Oil Drain Muffler Muffler Spark Plug Spark Plug Figure 3-1 - The major components of the engine. The shroud on your engine may differ. IMPORTANT Read this section before starting your lawn mower engine.
- Page 6 2. Insert the dipstick into the oil filler neck, but do not screw it in. 3. If the level is low, slowly add oil to the upper limit on the dipstick. See Figure 3-3 inset. 4. Tighten dipstick firmly before starting engine. IMPORTANT: Do not overfill.
- Page 7 Operating Your Engine Figure 3-5 - Models with a manual primer. Models equipped with a primer: 1. Push the primer 3 times. Wait about two seconds between each push. See Figure 3-5. In temperature below 10 C (50 F), prime 5 times. After the engine is warmed up, one prime may be needed for all IMPORTANT temperatures.
- Page 8 WARNING: Shut off the engine before Periodic inspection and adjustment of the engine is performing any maintenance. To essential if high level performance is to be maintained. prevent accidental start-up, disconnect Regular maintenance will also ensure a long service life. the spark plug boot.
- Page 9 IMPORTANT: Used motor oil may cause skin cancer if repeatedly left in contact with the skin for prolonged periods. Although this is unlikely unless you handle used oil on a daily basis, it is still advisable to thoroughly wash your hands with soap and water as soon as possible after handling used oil.
- Page 10 Fuel Filter Service Storage The fuel filter cannot be cleaned and must be replaced Engines stored over 30 days need to be drained of fuel once a year or every 100 operating hours; more often if to prevent deterioration and gum from forming in fuel run with old gasoline.
- Page 11 NOTES: For parts and/or accessories refer to customer support on page 2. Adressez-vous au «Service après-vente» à la page 2 pour ce qui concerne les pièces et/ou accessoires.
- Page 12 2P70M0A (173cc) Engine/Moteur Models with electric start/Modèles avec démarraur électrique...
- Page 13 Ref. 173 cc No./ Part No./ Description Désignation Réf. No. de pièce 951-10368 Fuel Tank Réservoir d’essence Parts List 951-10855 Flywheel Shroud Déflecteur à volant 951-10335 Rubber Fuel Tank Mounting Rondelle de montage du réservoir en Pièces Washer caoutchouc 951-10334 Oil Filler Tube Assembly Tube du filtre à...
- Page 14 1P70MC (173cc) Engine/Moteur Models without electric start/Modèles sans démarraur électrique...
- Page 15 Ref. 173 cc No./ Part No./ Description Désignation Réf. No. de pièce 951-10438 Fuel Tank Réservoir d’essence Parts List 951-10369 Flywheel Shroud Déflecteur à volant 951-10840 Reed Valve Assembly Soupape d’injection d’air secondaire pulsé Pièces 951-10334 Oil Filler Tube Assembly Tube du filtre à...
- Page 16 Owner’s Manual. MTD recommends that you retain all your receipts covering maintenances on your small off-road engine, but MTD can not deny warranty solely for the lack of receipts or for your failure to ensure the performance to all scheduled maintenance.
- Page 17 4. Repair or replacement of any warranted part under the warranty provisions of this article must be performed at no charge to the owner at a warranty station. 5. Notwithstanding the provisions of Subsection (4) above, warranty services or repairs must be provided at all MTD distribution centers that are franchised to service the subject engines.
- Page 18 NOTES: For parts and/or accessories refer to customer support on page 2. Adressez-vous au «Service après-vente» à la page 2 pour ce qui concerne les pièces et/ou accessoires.
- Page 19 NOTES: For parts and/or accessories refer to customer support on page 2. Adressez-vous au «Service après-vente» à la page 2 pour ce qui concerne les pièces et/ou accessoires.
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Questions and answers
engine overloads with fuel, runs a low rpm & runs. Have changed carburetor and fuel filter. Have a 139cc MTD on Huskee mower.
how do i charge the battery