Mountfield SV150 Spécifications

Rel. 1.0 - 01/2005The manufacturer reserves the right to make all the necessary technical or commercial improvements to its products, sothere may be

Carburation problemsCarburettor is dirtyPoor seal of carburettor needlevalveChoke blockedLawnmower problemsThe lawnmower traction cable(if present) is

Fuel filter cloggedIgnition problemsInsufficient or no current to thespark plugLawnmower problemsThe throttle cable is not welladjustedCarburation pro

Environmental problemsThe engine is used at a highaltitudeCarburation problemsAir seeps into the carburettorThe governor malfunctions orthere is a pro

Electrical problemsThe earth cable is disconnect-ed or brokenLawnmower problemsBlade not balancedEngine screws looseProblems with the stoppingsystemFa

6.1 TANK AND SUPPLYGENERAL INFORMATIONThe supply system consists of a petrol tank (builtinto the upper conveyor) connected to the carburet-tor by a pi

reverse order.WARNING! Check that the petrol pipe (4) isintact and secured correctly before pouring innew fuel.B) Cleaning the tank 11 Remove the con

6.2 STARTING SYSTEMGENERAL INFORMATIONThe starting system is built into the upper conveyor(which also includes the tank) and consists of acable wound

6 Fit the other end of the cable in the conveyorhole, securing it to the handle (5) with a knot.7 Turn the pulley (3) and the cable (4) anticlock-wise

33 If the spring is not already released, keep holdof the pulley (3) and slowly unwind the entirecable (4) clockwise to release the return springgradu

6.3 INTAKE SYSTEMGENERAL INFORMATIONThe intake system uses an air filter which is directlyconnected to the carburettor and a manifold whichconveys the

MAIN CHAPTERS1. Rules and procedures for Service Centres This chapter covers all the main aspects of therelationship between the manufacturer and thes

B) Removing the filter body11 Clean the area around the filter cover (1).12 Remove the cover (1) by releasing the rear flap(2) and take out the sponge

6.4 CARBURATIONGENERAL INFORMATIONThe carburettor has a float with a fixed jet and a“CHOKE” control.The carburettor can malfunction in the followingwa

4 Loosen the central screw (5) fastening the floatchamber (6) and carefully collect all the petrolleft in the float chamber.5 Pull out the pin (7), di

C) Adjusting minimum speed21 Check that the throttle cable is adjusted cor-rectly [ 6.5.A].22 Let the engine heat up for a few minutes, thenset the t

6.5 GOVERNOR SYSTEM OF THE CARBURET-TORGENERAL INFORMATIONThe carburettor’s governor system consists of alever system mounted on a support attached to

B) Adjusting maximum speed11 Check that the throttle cable is correctly adjust-ed [ point “A”].12 Let the engine heat up for a few minutes thenset th

element (32), then loosen the screw (33).23 Loosen the three screws (34) fixing the support(35) to the cylinder head, then remove the sup-port (35) by

6.6 IGNITION SYSTEMGENERAL INFORMATIONThe ignition system has a flywheel with an electron-ic coil which supplies high voltage to the spark plug.The st

and to earth on the engine (5). Activate thestarter and see in the instrument if the sparkjumps. 3 If the test has a positive result, clean the elec-t

17 Carry out a spark test as described in point “A”: – If the spark jumps = the coil functions cor-rectly, so if the system malfunctions, it is dueto

INTRODUCTIONThe purpose of this manual is to help ServiceCentres service, disassemble and repair SV150engines.Each page of this manual states the foll

6.7 TURNING OFF AND STOPPING THE ENGINEGENERAL INFORMATIONThe engine is turned off and stopped by releasing alever on the lawnmower. The cable acts on

B) Checking the ignition off microswitch11 Remove the upper conveyor [ 6.1.A].12 Disconnect the faston (11) from the coil.13 Using an Ohmmeter tester

D) Replacing the system for turning off andstopping the engine 31 Remove the upper conveyor [ 6.1.A].32 Disconnect the brake wire (21) from the lever

6.8 EXHAUST SYSTEMGENERAL INFORMATIONThe exhaust system consists of a muffler installedon the cylinder together with a gasket, a spacer anda heatproof

6.9 ENGINE BLOCKGENERAL INFORMATIONThis engine is designed to significantly reduce theneed for servicing internal part, which would oftenturn out so e

facilitate access to the lower part and drain allthe oil.12 Remove the oil filling cap (11) and position asuitable container for collecting the oil. U

1.1 RULES AND PROCEDURES FOR SERVICECENTRESA) Warranty validityThe warranty is supplied under the terms, pro-cedures and limits stated in the contract

2.1 GENERAL AND SAFETY REGULATIONSA) Qualification of operatorsAll maintenance, disassembly and repairs must becarried out by expert mechanics who are

A) IdentificationAll the engines have aserial number stampedon the right-hand side ofthe crankcase; this 9-figure code identifies:The serial number mu

G) Spare partsBelow is a list of spare parts available, not includingparts that are easily available or whose replacementwould entail particularly exp

4.1 ENGINE TUNING AND TESTINGA) Operating guidelinesThe instruction manual describes a series of opera-tions for the client to ensure minimum basic ma

Lawnmower problemsThe engine brake cable isfaulty or unfastenedElectrical problemsThe microswitch is faultyElectric current does not reachthe spark pl