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Service Manual Shindaiwa Grass Trimmers, Brushcutters and ...

Q Shindaiwa Inc. 19941 Service ManualShindaiwa Grass Trimmers, Brushcutters and Lawn EdgersContentsSectionpage1 Model Designation and 22 83 18 General Information .. 18 Troubleshooting carburetors .. 20TK carburetors .. 25 Walbro carburetors .. 344 Recoil 445 Ignition 506 Clutches and 587 Cylinders and 648 Engine 729 8010 Mainshafts and Outer 8411 9412 Lawn 10213 104 Specifications .. 104 Torque Values .. 108 Tolerances and Wear Limits .. 110 Fuel and Oil .. 112 Metric Conversions .. 114 Special Service Tools .. 115Q Shindaiwa Inc. 19942 Attention StatementsAdditional attention statements that are notpreceded by the Attention Symbol are:IMPORTANT!

Carburetor mixture is too lean. Improper gas/oil ratio. Fan, fan cover, cylinder fins dirty or damaged. Carbon deposits on the piston. Adjust trimmer line. Cut at a slower rate. Adjust the carburetor. For proper procedures, refer to the Carburetor and Specifications Sections. Re-fill with fresh fuel of the correct mixture (Shindaiwa Premium 2 ...

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Transcription of Service Manual Shindaiwa Grass Trimmers, Brushcutters and ...

1 Q Shindaiwa Inc. 19941 Service ManualShindaiwa Grass Trimmers, Brushcutters and Lawn EdgersContentsSectionpage1 Model Designation and 22 83 18 General Information .. 18 Troubleshooting carburetors .. 20TK carburetors .. 25 Walbro carburetors .. 344 Recoil 445 Ignition 506 Clutches and 587 Cylinders and 648 Engine 729 8010 Mainshafts and Outer 8411 9412 Lawn 10213 104 Specifications .. 104 Torque Values .. 108 Tolerances and Wear Limits .. 110 Fuel and Oil .. 112 Metric Conversions .. 114 Special Service Tools .. 115Q Shindaiwa Inc. 19942 Attention StatementsAdditional attention statements that are notpreceded by the Attention Symbol are:IMPORTANT!

2 A statement preceded by IMPORTANT isone that possesses special :A statement preceded by NOTE containsinformation that is handy to know and maymake your job easier.* A statement preceded by a pointingfinger is a tip, suggestion or other trick ofthe trade that just might ease your this Manual are special attention statements surrounded by boxes and pre-ceded by the triangular Attention Symbol:WARNING!A statement preceded by the word WARNING contains informationthat should be acted upon to preventserious bodily !A statement preceded by theword CAUTION containsinformation that should be acted upon toavoid damaging your Shindaiwa Inc. 19943F-18 Grass TrimmerSHINDAIWA ENGINEMODELSER.

3 X X X XX X X X X X XACC-20 Located on theengineTypicalnameplatelocationTypical identificationplacard locationsACC-22F-20 Grass TrimmerF-230 Grass TrimmerF-21 Grass TrimmerModel Designation and Indentification Section 1 Curved-shaftGrass TrimmersMODEL IDQ Shindaiwa Inc. 19944 Straight-shaftGrass TrimmersT-18 Grass TrimmerT-20 Grass TrimmerT-27 Grass TrimmerSection 1 Model Designation and IndentificationMODEL IDT-230 Grass TrimmerT-250 Grass TrimmerT-25 Grass TrimmerQ Shindaiwa Inc. 19945 Model Designation and Indentification Section 1 BrushcuttersC-230 BrushcutterC-27 BrushcutterMODEL IDC-250 BrushcutterC-25 BrushcutterQ Shindaiwa Inc. 19946 Section 1 Model Designation and IndentificationC-35 BrushcutterB-45 BrushcutterBP-35 BrushcutterRC-45 BrushcutterBrushcuttersMODEL IDQ Shindaiwa Inc.

4 19947 Model Designation and Indentification Section 1 Lawn EdgersLE-230 Lawn EdgerLE-250 Lawn EdgerMODEL IDQ Shindaiwa Inc. 19948 CRK-27 Section 2 Troubleshooting The 2-Stroke Cycle EngineTheory ofOperation1. IntakeWhen the piston moves up toward the cylin-der head, a vacuum is created in the crank-case. As the piston uncovers the intake port,the vacuum draws a fresh charge fuel-airmixrure into the fuel-air mixture accomplishes twofunctions before it is moved to the combustionchamber during the transfer process:nOil in the fuel-air mix coats all internal partsincluding cylinder walls, crankshaft, addition, the atomized fuel mixtureabsorbs heat as it enters the crankcase,lowering the engine s operating CompressionThe piston continues to move upward, closingoff all ports above the piston crown.

5 Theair-fuel mixture introduced during the previousrevolution s transfer cycle is now trapped inthe combustion chamber and IgnitionAs the piston approaches the cylinder head,the spark plug fires and ignites the fuel-airmixture. To compensate for increases inengine rpm, the spark timing is plugCompression/CombustionExhaust andtransfer portsclosedIntakeportopenCrankcaseVacuum Figure Crankcase vacuum is created during thecompression stroke. As the piston uncovers the intakeport, a fresh fuel-air mixture is drawn into thecrankcase. When the spark plug fires, the compressedmixture above the piston ignites and begins to two-stroke cycle or two-cycle engineproduces one powerstroke for everyrevolution of itscrankshaft.

6 Intake andcompression occursduring the piston s up stroke; powerand exhaust occursduring the down distinct pro-cesses occur duringevery revolution of thecrankshaft. Since aloss or weakness ofeven one of theseprocesses will affectthe other five, anunderstanding ofthem will go a longway toward accu-rately diagnosingproblems Shindaiwa Inc. 19949 Troubleshooting The 2-Stroke Cycle Engine Section 2 CRK-26 Figure The burning mixture expands, forcing thepiston down and rotating the crankshaft. Continuedpiston movement compresses the fresh mixture in thecrankcase. As the piston exposes the transfer port,crankcase pressure forces fresh mixture into thecombustion chamber and helps push the remainingexhaust gasses through the exhaust portclosedExhaust andtransfer portsopen4.

7 Power (combustion)The fuel-air mixture expands rapidly, forcingthe piston down the cylinder. Piston movementis transferred to the crankshaft through theconnecting rod, turning the ExhaustExpanding gasses continue to force the pistondownward. As the piston exposes the exhaustport, most of the spent combustion gasses areexpelled through the port and out the TransferThe piston s downward movement covers theintake port and simultaneously opens thetransfer port. That allows the compressedfuel-air mixture from Step 1 to enter the fresh fuel-air mixture enters thecylinder, it also helps push or scavengeremaining exhaust gasses out through theexhaust Shindaiwa Inc.

8 199410 Section 2 TroubleshootingAll Shindaiwa products are powered by highperformance engines that produce the mosthorsepower from the lightest possible factors are critical to the Service lifeand durabiity of any high performanceengine:Factors ThatAffect Durability1. LubricationProper lubrication is essential for reducingfriction between an engine s moving reducing friction, lubrication also helpsreduce the heat developed during a 2-cycle engine doesn t have areservoir of oil in its crankcase, a steadysupply of high-quality lubricant must enter theengine with the fuel to the Fuel and Oil Section of theAppendix for specific fuel/oil CoolingCooling any high performance engine is acomplex task.

9 To remove the heat generatedfrom both friction and the combustion process, Shindaiwa engines rely on:nLubricating OilnAir-Fuel MixturenCylinder Fin DesignnFlywheel FanCAUTION!Proper lubrication and coolingare essential to both the perfor-mance and Service life of any two-cycleengne! Even a partial failure in one orboth of these areas can lead to engineseizure!TROUBLESHOOTINGQ Shindaiwa Inc. 199411 Troubleshooting Section 2 TroubleshootingGuideDoes the engine crank OK?Faulty recoil starter. Fluid in the crankcase. Internal there good compression?Loose spark plug. Excess wear on cylinder, piston, and re-test. Refer to the Cylinders and Piston the fuel fresh and of the proper grade and mixture?

10 Fuel is out-dated: may be stale or fuel visible and moving in the return line during priming?Check for clogged fuel filter and/or vent. Clean as Refer to the Carburetor there spark at the spark plug wire terminal?The ignition switch OFF . Faulty ignition ground. Faulty coil and/or transistor unit. Move switch to ON and re-start. Refer to the Ignition Section. Refer to the Ignition Section. NOYESYESIs the spark plug firing properly?If the plug is wet, excess fuel may be in the cylinder. The plug may be fouled or improperly gapped. The plug may be damaged internally or the wrong the engine with the plug removed, replace the plug, and re-start. Clean and re-gap the plug to inch ( mm).


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