Engine Model: RV150 and SV150 RV40, V35 SELF-HELP PROBLEM SOLVING and MAINTENANCE for PETROL LAWNMOWERS These engines are fitted to the following recent products: • 421 HP • 461 HP • 511 PD • 461R HP • M41 HP • M61 PD • PWRSP410PRMA • HP474 (pre 2011) • SP534 • MAC484HP • MAC PRO 50 • HL454HP • GL484SP • Multiclip 50HP • Multiclip 501HP • Cooper 481HP • HP184 • SP184 • SP454 (some models) • HP414 (some models) • EP434 • • • • • • • • • • 461 PD 461R PD PWRHP410PRMA SP474 (pre 2011) MAC484SP HL454SP Multi
Engine Model: RV150 and SV150 RV40, V35 1 Safety Precautions Your lawnmower should be used with due care and attention. Symbols have therefore been placed on various parts of the machine to remind you of the main precautions to be taken. Their meaning is explained below. You are also asked to read the safety precautions listed below. 1. Warning: Read the instruction manual before using the machine. 2. Beware of thrown objects: Keep other people at a safe distance whilst working. 3.
Engine Model: RV150 and SV150 RV40, V35 PREPARATION: 1. While mowing, always wear sturdy footwear and long trousers. Do not operate the equipment when bare foot or wearing open sandals. Avoid loose clothing that may snag on moving parts. 2. Thoroughly inspect the area where the equipment is to be used and remove all objects which may be thrown by the machine or damage the cutter assembly and the engine (stones, sticks, metal wire, bones, etc). 3.
Engine Model: RV150 and SV150 RV40, V35 18.
Engine Model: RV150 and SV150 RV40, V35 the characteristics of the vehicle or the place where it has to be placed or collected. 2. During transport, fasten the machine securely with ropes or chains. Page 5 of 36 Mountfield150cc Selfhelp Guide 2011, Issue 1.
Engine Model: RV150 and SV150 RV40, V35 2 Fuel, Oil, Air Filter and Spark Plug Requirements FUEL – these are 4-stroke petrol engines. The correct fuel is ordinary unleaded petrol. NOTE: The RV150 and SV150 engines have dual fuel capability and so biofuels may be used without additional adjustment to the engine. Fuel capacity: • V35 engine – 0.8 litre • RV and SV 150 engines – 0.8 litre • RV40 engines – 0.
Engine Model: RV150 and SV150 RV40, V35 3 Routine Engine Maintenance Regular and careful maintenance is essential to preserve the original performance and safety level of the engine. Always store the mower in a dry place. TESTING FOR A SPARK (this job requires 2 people) 1. Stand the machine on a firm surface and set the height adjusters to the lowest setting for added safety. 2. Remove the H.T. lead (1 in the diagram) – a push/pull fit. 3.
Engine Model: RV150 and SV150 RV40, V35 CHANGING ENGINE OIL Check the engine oil before each use. Engine Oil These small four stroke engines hold up to 0.6 litres of oil (1.2 Pints). Any oil shortages can cause premature wear or serious damage to the engine. So too will using the incorrect grade of oil. NB Wipe the dipstick, then fully replace it by screwing it in, now withdraw it to gain an accurate reading.
Engine Model: RV150 and SV150 RV40, V35 ENGINE MANUFACTURER’S RECOMMENDATIONS: As a guide, the information below has been copied from the engine manufacturer’s user manual: RV150, SV150, RV40 and V35 engines: NB: Please refer to the engine manufacturer’s manual for specific information. Page 9 of 36 Mountfield150cc Selfhelp Guide 2011, Issue 1.
Engine Model: RV150 and SV150 RV40, V35 4 Starting the Engine The correct way to start the mower: Check the engine oil, and there is sufficient clean/fresh petrol in the fuel tank. 1. Ensure the machine is on a firm level surface (path, patio or short grass). Check the underside is clear from old lawn debris. If you have to tilt the mower, do this backwards only. Before checking the underside, make sure to remove the HT Cap (sparkplug cap). 2. Check the H.T.
Engine Model: RV150 and SV150 RV40, V35 A: Fuel requirements: These engines run on ordinary un-leaded fuel. The fuel tank holds 0.8 litres. Stale fuel or build-ups in the fuel tank are most common when the mower has been stored for a period of time (e.g. over the winter period) The fuel tank on these gravity-fed engines breathes through the thread on the fuel cap. An air lock may be created if the fuel cap is too tight……this would cause the engine to cut out.
Engine Model: RV150 and SV150 RV40, V35 B: Spark plug: 1. Check the H.T. lead (spark plug cap) is correctly fitted to the spark plug and the metal cap inside the H.T. lead cap is pointing forwards to make a good connection with the spark plug. To test for a spark see 2-6 below. 2. Stand the machine on a firm surface and set the height adjusters to the lowest setting for added safety. 3. Remove the H.T. lead (1 in the diagram). 4.
Engine Model: RV150 and SV150 RV40, V35 D: Adjusting the micro switch: 1. Hold the OPC bar gently in to the main handle and listen for a faint click coming from the back right hand corner of the engine. You are checking here for a micro-switch engaging which allows the electrical feed to the spark plug. If there is no audible click it may be that the micro-switch is not fully engaged. 2.
Engine Model: RV150 and SV150 RV40, V35 5 Very High Revs from the Engine QUICK TROUBLESHOOTING GUIDE: Problem: Likely Cause: Engine revs • Throttle cable is impeding the are very high, regulator mechanism the stone guard flap is • Debris caught in the throttle blown up the springs in the air off the grassbox, • Damaged throttle regulator or the mower linkage, or other unspecified is ‘running throttle problems away’ (on self-propelled models) A: Re-aligning the throttle cable: 1.
Engine Model: RV150 and SV150 RV40, V35 METAL LEVER? 5. If ‘YES’: Follow the cable backwards to where it crosses over at the back of the mower. There is a plastic loop around this cable and another cable. Moving that plastic loop either up or down the cable will alter the lie of the cable and move it away from the regulating mechanism. This will cause the engine revs to fall to a normal level. If ‘NO’: See sections B and C B: Removing debris from the throttle linkage: 1.
Engine Model: RV150 and SV150 RV40, V35 6 Engine Starts and Smokes Heavily QUICK TROUBLESHOOTING GUIDE: Problem: Likely Cause: White, blue or • Over-filled with oil grey smoke from • Mower has been tipped incorrectly exhaust Oil coming from exhaust • • Over-filled with oil Mower has been tipped incorrectly Solution: • Reduce oil (see A) • Remove oil from cylinder (see B) • • Reduce oil (see A) Remove oil from cylinder (see B) A: Do not overfill the engine with oil.
Engine Model: RV150 and SV150 RV40, V35 NB During subsequent uses (for maybe a further 8-10 hours) the mower may smoke a little. Droplets of oil may come from the exhaust onto the deck as the oil is cleared from the cylinder. Simply wipe these away with an old rag. The correct way to tip your mower is BACKWARDS. Page 17 of 36 Mountfield150cc Selfhelp Guide 2011, Issue 1.
Engine Model: RV150 and SV150 RV40, V35 7 Engine Cutting Out or Running Unevenly QUICK TROUBLESHOOTING GUIDE: Problem: Likely Cause: Engine hunts • Fuel cap too tight briefly and stops Solution: • Loosen cap (see A) Engine hunts continuously • • Dirt in fuel supply Air drawn into the engine from a faulty manifold • • Replace fuel (See B) Refer to dealer Engine stops without hunting and won’t start again • Faulty spark plug or faulty spark plug connection • Check for a spark (See C) • Micro swi
Engine Model: RV150 and SV150 RV40, V35 within a few weeks, and petrol should be bought from the garage and transported/stored in approved plastic petrol containers. NB: Where a fuel supply blockage has occurred, a service dealer should be consulted to free the blockage. Your local ServiceLink centre can be found at www.servicelink.org.uk C: 1. 2. 3. 4. 5. 6. Faulty spark plug or faulty spark plug connection: Check the H.T.
Engine Model: RV150 and SV150 RV40, V35 D: Micro switch not engaging: 1. Hold the OPC bar gently in to the main handle and listen for a faint click coming from the back right hand corner of the engine. You are checking here for a micro-switch engaging which allows the electrical feed to the spark plug. If there is no audible click it may be that the microswitch is not fully engaged. 2.
Engine Model: RV150 and SV150 RV40, V35 8 Pull Cord Not Pulling or Snatching Back QUICK TROUBLESHOOTING GUIDE: Problem: Likely Cause: Pull cord will not • OPC not engaged pull • Grass caught between the blade and the deck • “Hydraulic lock” Cord snatches back • • Solution: • Hold OPC in (see A) • Remove grass from the blade (see B) • Remove oil from cylinder (see C) Blade rotation is impeded • Blade is unbalanced or • damaged Free blade (See D) (See E) and refer to dealer A: The OPC lever must be he
Engine Model: RV150 and SV150 RV40, V35 D: The engine pull cord may snatch back when pulled if the machine is not on a flat and firm surface, or the blade and/or its mounting boss are damaged or fitted insecurely. . 1. Ensure the machine is situated on a firm level surface (path, patio or short grass). Check the underside of the machine is clear from old lawn debris. If you have to tilt the mower, do this backwards only.
Engine Model: RV150 and SV150 RV40, V35 9 Cutting and Collecting Grass, Vibration QUICK TROUBLESHOOTING GUIDE: Problem: Likely Cause: Mower will not • Technique is incorrect cut grass • Grass is too long or wet properly • Problem with the blade or blade mounting Mower vibrates excessively • • Mower will not collect grass properly A • • • Solution: • See A • See A • See B Problem with the blade or blade mounting The engine mounting is loose • See B • See B Technique is incorrect Grass is too long
Engine Model: RV150 and SV150 RV40, V35 maximum height setting in steps until you reach your ideal height. 1. Remember the one third rule – never remove more than one third of the length of the blade of grass whenever you mow. This is good advice no matter what type of mower you use! 2.
Engine Model: RV150 and SV150 RV40, V35 indicate damage to the blade, or blade mounting, or that the engine is loose Check the blade bolt is tight. WARNING: Mark the blade before attempting to remove it. This will enable you to replace it the correct way up. Check the blade mount. The mount has two lugs one either side of the blade securing bolt. If these have sheered then the blade can move. If the blade mount has failed, a replacement can be purchased through your local Mountfield dealer.
Engine Model: RV150 and SV150 RV40, V35 C Build-Up of Grass Clippings Underneath or Lack of Airflow When cutting grass make sure you are using the machine on full throttle (if one is fitted). Raising the height of cut increases airflow and assists grass collection. This is especially so if the grass is damp. Reducing the height of cut in stages to achieve the desired level is a sound strategy. 1. Ensure there is no build up of grass underneath the casing.
Engine Model: RV150 and SV150 RV40, V35 10 Loss of Drive on Self-Propelled Mowers QUICK TROUBLESHOOTING GUIDE: Problem: Likely Cause: Clutch cable very • Cable is detached or broken slack and mower • Cable tension is incorrect does not drive Solution: • See A • See A Back wheels turn when raised from ground but mower does not drive • • Clutch cable has stretched Cable tension is incorrect • • See A See A Clutch cable may be slack and mower does not drive • Belt is broken or has come off the drive
Engine Model: RV150 and SV150 RV40, V35 the problem may be the belt has come off the drive pulleys (see Section 2) or the clutch cable has broken or become detached (see a service dealer). FOR MOWERS WITH THE CLUTCH BAR RUNNING ACROSS THE HANDLE: a) Check the clutch cable runs up the left hand side of the main handle through the anchoring bracket on the handle.
Engine Model: RV150 and SV150 RV40, V35 before you undertake ANY of the work below. The air filter cover and filter element/sponge will need also to be removed. This is located on the right hand side of the engine, secured with a single clip to the rear of the cover. Push this in and the cover will release. Now follow the sequence of steps below: 1. Remove the grassbox 2. Check you have already removed the spark plug cap (for safety reasons) and the air filter (to avoid potential contamination) 3.
Engine Model: RV150 and SV150 RV40, V35 pulley as if winding a chain onto a bicycle wheel (it may appear that this pulley is at an angle, but the tension of the belt will straighten this) 10. Replace the belt guard plate and re-attach the blade the correct way up 11. Carefully lift the mower down onto the ground without tipping it forwards or sideways and replace the spark plug cap and air filter.
Engine Model: RV150 and SV150 RV40, V35 11 Transportation and Handling The correct way to gain access underneath the mower: Before checking the underside, make sure to remove the HT Cap (sparkplug cap). ALWAYS lift from the front of the mower so that the front wheels are raised, and the handles touch the ground at the rear. Do not tip the mower sideways or forward (like one might lift a wheelbarrow) as this can flood the air filter, exhaust and even the cylinder with engine fluids.
Engine Model: RV150 and SV150 RV40, V35 12 Maintenance and Storage Regular and careful maintenance is essential to preserve original performance and safety levels of the engine. Always store the mower in a dry place. Please also refer to the Engine Routine Maintenance information for additional help. Key maintenance and storage information (all engines): 1. Keep all nuts, bolts and screws tight to ensure the equipment is in safe working condition.
Engine Model: RV150 and SV150 RV40, V35 13 Guarantee, Spare Parts, Repairs MOWER MODEL: GUARANTEE PERIOD: PWRHP410PRMA, PWRSP410PRMA PWR400, HL454HP, HL454SP, HP184, SP184, HP454, SP454 HP414, SP414 HP470, SP470, HP474, SP474, SP534 421 HP, 461 HP, 461 PD 511 PD, 461R HP, 461R PD Multiclip 50HP, Multiclip 50SP Multiclip 501HP Cooper 481HP, Cooper 481PD MAC484HP, MAC484SP, GL484SP MACPRO50 } 1 year from the date of purchase } } 2 years from the date of purchase } 3 years from the date of purchase (subj
Engine Model: RV150 and SV150 RV40, V35 Repairs Your local ServiceLink centre can be found at www.servicelink.org.uk Notes: Page 34 of 36 Mountfield150cc Selfhelp Guide 2011, Issue 1.
Engine Model: RV150 and SV150 RV40, V35 Notes: Page 35 of 36 Mountfield150cc Selfhelp Guide 2011, Issue 1.
Engine Model: RV150 and SV150 RV40, V35 Notes: Page 36 of 36 Mountfield150cc Selfhelp Guide 2011, Issue 1.
