1. Manuals
  2. Brands
  3. Robin America Manuals
  4. Engine
  5. EK13
  6. Service manual

Robin America EK13 Service Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
EK1 3
EK1 7
EK20
EK28
EK30

Advertisement

Table of Contents
loading

Related Manuals for Robin America EK13

Summary of Contents for Robin America EK13

  • Page 1 EK1 3 EK1 7 EK20 EK28 EK30...

  • Page 3: Table Of Contents

    CONTENTS Section Title Page 1. SPECIFICATIONS ..........04 2.

  • Page 4: Specifications

    1. SPECIFICATIONS Model EK13 EK17 Air-Cooled, 4-Cycle, Single-Cylinder, Type Horizontal P.T.O. Shaft, OHV Gasoline Engine Bore & Stroke 61 × 43 67 × 48 Piston Displacement Compression Ratio kW/r.p.m. 2.1/1800 2.1/3600 3.2/1800 3.2/3600 Continuous Output (HP/r.p.m.) (2.9/1800) (2.9/3600) (4.3/1800) (4.3/3600) kW/r.p.m.
  • Page 5 Model EK20 EK28 EK30 Type Air-Cooled, 4-Cycle, Single-Cylinder, Horizontal P.T.O. Shaft, OHV Gasoline Engine Bore & Stroke 72 × 48 79 × 56 80 × 59 Piston Displacement Compression Ratio kW/r.p.m. 3.5/1800 3.5/3600 4.9/1800 4.9/3600 5.5/1800 5.5/3600 Continuous Output (HP/r.p.m.) (4.8/1800) (4.8/3600) (6.6/1800)

  • Page 6: Performance

    2. PERFORMANCE 2-1 MAXIMUM OUTPUT The Maximum output is the output of an engine with its throttle valve fully opened and considering that all the moving parts are properly broken in. A new engine may not produce full maximum output while its moving parts are still not broken in. NOTE: Power curves shown in the following charts are made in accordance with SAE internal combustion engine standard test code J1349.
  • Page 7 MAXIMUM MAXIMUM TORQUE TORQUE MAXIMUM TORQUE Continuous Rated HP Continuous Rated HP Continuous Rated HP REVOLUT r.p.m. REVOLUTION r.p.m. REVOLUTION r.p.m. MAXIMUM MAXIMUM TORQUE TORQUE Continuous Rated HP Continuous Rated HP r.p.m. REVOLUTION r.p.m. REVOLUTION...

  • Page 8: Features

    Suitable clearance in between rocker arm and rocker shaft, in addition cylinder head cover with double metal sheets enables less valve noise. (EK13, 17, 20, 28) Unlike above noted models, pivot type rocker arm is adopted as simple construction and achieving low noise.
  • Page 9 3-4 RUST FREE DESIGN FOR LONG LIFE Anti – rust and anti – corrosion, suitable for agriculture machine. This model has advanced anti-rust carburetor by considering agriculture machine which works in limited period in a year. And fuel tank has double anti – rust character, plated sheet metal and inner painting makes its life longer.

  • Page 10: General Description Of Engine Components

    4. GENERAL DESCRIPTION OF ENGINE COMPONENTS 4-1 CYLINDER AND CRANKCASE The cylinder and crankcase is aluminum die-casting as one piece. A special cast iron cylinder liner is molded into the aluminum die-casting. The crankcase has a mounting surface on the output shaft side to which the main bearing cover is attached.
  • Page 11 4-8 CYLINDER HEAD The cylinder head is an aluminum die-casting with a pent roof combustion chamber construction. (EK13, 17, 20, 28) Exhaust valve Intake valve The intake and exhaust ports are arranged in a cross direction to improve combustion efficiency.
  • Page 12 4-9 GOVERNOR SYSTEM The governor is a centrifugal flyweight type which ensures constant operation at the selected speed against load variations. The governor gear with governor weights is installed on the main bearing cover. 4-10 COOLING SYSTEM The engine uses a forced air-cooling system in which a Cooling fan synthetic resin cooling fan (which is separate from the flywheel), reduce noise and forces cooling air into the...
  • Page 13 4-14 AIR CLEANER The engine uses an air cleaner that is quieter than conventional one. A semi-wet urethane foam element is used in the STD air cleaner. Dual element air cleaner (with a primary element of dry type sponge and secondary element of dry type paper) and other types are also provided as options.
  • Page 14 4-17 DIMENSIONS B Type D Type...
  • Page 15 [  ] D type number in parentheses (mm) Model EK13 EK17 EK20 EK28 EK30 Position 353 [355.2] 196.5 156.5 [158.7] 156.5 [159] 80 [106] 101.5 [133.5] 418.5 275.5 (10) 48.5 56.4 63.7 (11) (12) 46.5 (13) 50 [52.2] (14) (15) (16) 14.5...
  • Page 16 4-18 SECTIONAL VIEW OF THE ENGINE Governor spring Rocker cover Piston Balancer shaft 1) EK13, 17, 20, 28 2) EK30 Rocker arm Cross flow port Center plug placement pent roof combustion chamber...

  • Page 17: Disassembly And Reassembly

    5. DISASSEMBLY AND REASSEMBLY 5-1 PREPARATIONS AND PRECAUTIONS (1) When disassembling the engine, memorize the location of each part so that you can reassemble the engine correctly. If necessary, attach identification tags with the required assembly information to the parts. (2) Store groups of parts in separate boxes.

  • Page 18: Disassembly Procedure

    5-3 DISASSEMBLY PROCEDURE Step Parts to remove Remarks and procedures Fasteners Drain the engine oil Remove a drain plug (M14 x 12mm) located on both 14 mm spanner sides of the case. Take care not to lose the gaskets. * To discharge oil quickly, remove the oil gauge (M22). Shut (OFF) the fuel strainer.
  • Page 19 Step Parts to remove Remarks and procedures Fasteners 10 mm box spanner Front cover Remove the front cover from the bracket. M6 bolt : 2 pcs. 12 mm box spanner Muffler and Muffler cover (1) Remove the muffler cover from the muffler. 10 mm box spanner (2) Remove the muffler from the cylinder head.
  • Page 20 Step Parts to remove Remarks and procedures Fasteners Speed control lever and Remove the speed control lever and bracket from the 10 mm box spanner Bracket cylinder head. M6 x 14 mm : 1 pc. Slide to dismount the speed control lever and bracket from the cylinder head Release the bolt.
  • Page 21 Step Parts to remove Remarks and procedures Fasteners Air cleaner cover Remove the air cleaner cover and element. Air cleaner Remove the air cleaner while pulling the breather pipe 10 mm box spanner away from the rocker cover or cleaner base. Carburetor, Insulator Remove the air cleaner with carburetor together from the cylinder head.
  • Page 22 Step Parts to remove Remarks and procedures Fasteners Stop switch Disconnect the wire and remove the stop switch from + screwdriver the blower housing. M4 x 12 mm : 2 pcs. Recoil starter Remove the recoil starter from the blower housing. M6 x 14 mm : 4 pcs.
  • Page 23 M6 x 25 mm：2 pcs. Starting pulley Remove the starting pulley and cooling Blower from the EK13 Cooling Blower flywheel. Fit a box wrench or a socket wrench on the 17 mm box spanner...
  • Page 24 Step Parts to remove Remarks and procedures Fasteners [MODEL WITH (1) Disconnect the grounding cable from battery. 12 mm box spanner ELECTRIC STARTER (2) Disconnect the wire leading from the key switch M8 nuts “ST” terminal to the magnetic switch. TYPE] 12 mm box spanner Control box,...
  • Page 25 Step Parts to remove Remarks and procedures Fasteners [MODEL WITH Disconnect the wire clamp. 10 mm box spanner CHARGE COIL TYPE] NOTE: M6 x 10 mm : 1 pc. Wire clamp Disconnect the wire clamp in this step, also an engine which has both of the charge coil and the oil sensor.
  • Page 26 Rocker arm Remove the rocker arm. 10 mm box spanner 10 mm spanner hexagon wrench EK13, 17, 20 Remove the pin (rocker arm) and the rocker arm from the cylinder head at the compression top dead center. EK28 EK30 Loosen nut (pivot bolt) and then remove the pivot bolt with rocker arm.
  • Page 27 Take care not to lose the dowel pin. Intake and exhaust (1) Remove the cotter from the spring retainer. valves (2) Remove the intake valve and the exhaust valve. EK13, 17, 20, 28 EK30 ①Retainer lock ②Spring retainer ③Valve spring ④Oil seal...
  • Page 28 10 or 12 mm crankcase. box spanner Remove the main bearing cover while tapping gently EK13 : M8 around the cover using a plastic hammer or similar tool. EK17,20,28,30: M8 (See Fig.) Be careful not to damage the oil gauge or oil seal or not...
  • Page 29 Step Parts to remove Remarks and procedures Fasteners Camshaft and tappets Remove camshaft. Be careful not to damage camshaft and tappets. Balancer Position piston at top dead center and remove balancer. Tappets Camshaft Balancer...
  • Page 30 Remarks and procedures Fasteners Connecting rod and piston (1) Scrape off any carbon from the cylinder and the EK13,17,20,30: piston head, and then remove the connecting rod bolt. 10mm box spanner (2) Remove the connecting rod cap. (3) Rotate the crankshaft until the piston comes to its EK28 : top position.
  • Page 31 Step Parts to remove Remarks and procedures Fasteners Crankshaft (1) Remove the woodruff key (for the flywheel Plastic hammer magneto). (2) Hold the crankshaft by your hand and then remove the crankshaft from the crankcase by tapping its magneto side end with a plastic hammer, taking care not to damage the oil seal.

  • Page 32: Reassembly Procedure

    5-4 REASSEMBLY PROCEDURE 5-4-1 NOTES ON REASSEMBLY (1) Clean each parts carefully, taking special care with the piston, cylinder, crankshaft, connecting rod and bearings. (2) Scrape off any carbon deposits on the cylinder head and the piston head. Be particularly careful when removing carbon from the piston ring grooves.
  • Page 33 Install the oil ring first, followed by the top ring. When installing the piston ring, make sure that the "1R or 2R" mark is face up. EK13, 17, 20, 28 EK30 BARREL BARREL TAPER...
  • Page 34 (c) To mount the connecting rod, line up the matching marks and fit the clinch portions firmly together. Model Tightening torque Bolt box wrench 8.8 – 12.8 N・m EK13,17,20 10mm M6X1.0X33L (90 - 130 kgf・cm) 23.6 – 29.4 N・m EK28 12mm M8X1.25X42L...
  • Page 35 (6) BALANCER SHAFT Install balancer shaft to crankcase aligning matching mark of balancer gear and crank gear as shown in the illustration. CAUTION : Incorrect timing of the gears will cause malfunction of the engine and may results in damage due to interference of the parts.
  • Page 36 (SIDE CLEARANCE)-0.2 mm = THICKNESS OF CRANKSHAFT SHIM (mm) (A1+0.014)-B1= SIDE CLEARANCE (in.) (SIDE CLEARANCE)-0.008 in. = THICKNESS OF CRANKSHAFT SHIM (in.) Following are available spacer shims. ( CRANKSHAFT BLANCER EK17,20,EK28 EK30 EK13 EK17,20 EK28 EK30 T= 0.50 T= 0.20 T= 0.10 T= 0.20 T= 0.20...
  • Page 37 Tap the cover into place with a soft hammer. NOTE ; Oil the bolt threads first, and then tighten the flange bolts. Model Tightening torque Bolt box wrench 10 – 140 N・m EK13 M6X1.0X33L 10mm (100 - 140 kgf・cm) 22 – 30 N・m EK17,20,28,30 M8X1.0X40L 12mm (220 - 300 kgf・cm)
  • Page 38 (12) INTAKE AND EXHAUST VALVES Take the following points into account when mounting the intake and exhaust valves on the cylinder head. NOTE 1: Replace the valve with a new one if it shows signs of wear. (Refer to the “STANDARD REPAIR TABLES”...
  • Page 39 Install cylinder head to cylinder with new head gasket. Tighten four flange bolts evenly in three steps by the following tightening torque: Cylinder head bolt: EK13, 17, 20; M8X1.25X60L-2pc / M8X1.25X85L-2pcs EK28; M10X1.5X66L-2pcs / M10X1.5X100L-2pcs EK30; M10X1.5X66L-2pcs / M10X1.5X86L-2pcs Tightening torque...
  • Page 40 (a) Insert push rods into crankcase. Put push rod tip in the hollow of tappet top. ・EK13,17,20,28; Pass the pin (rocker arm) through the rocker arm and mount them on the cylinder head ・EK30 ; Apply oil to rocker arms and assemble them to cylinder head using pivot and nut.
  • Page 41 Replace the gasket with a new one, and mount the rocker cover. EK13, 17, 20: M6×1.0×12 mm bolt & washer AY: 6 pcs. EK28: M6 × 1.0 × 12 mm bolt & washer AY: 7 pcs. EK30: M6 × 1.0 × 12 mm flange bolt: 4 pcs.
  • Page 42 Mount the spark plug. (21 mm plug wrench) Remove any carbon deposits from the spark plug and inspect the electrode for damage before mounting. Replace with a new one, if necessary. Model EK13,17,20,28 EK30 Spark plug NGK BP6HS TORCH E6TC 0.6 - 0.7 mm...
  • Page 43 BLOWER HOUSING, RECOIL STARTER and STOP SWITCH The projection (upper) on the baffle 1 and 2 with the crankcase and mount it (under) with the bolt. (a) BAFFLE EK13, 17, 20, 28: M6×1.0×10 mm flange bolt: 1 pc M6×1.0×12 mm tapping bolt: 2 pcs EK30: M6×1.0×12 mm flange bolt: 3 pcs...
  • Page 44 (19) INSULATOR, CARBURATOR and AIR CLEANER BASE (a) Install bolts to cleaner base, (b) Install gasket for cleaner base to cleaner base. (c) Install the carburetor. (d) Install insulator and gasket and then mount to cylinder head. Insert the breather pipe into the rocker cover and then mount the air cleaner base. The following are positions to insert for each type of element：...
  • Page 45 (20) SPEED CONTROL LEVER and BRACKET Attach speed control lever and bracket (b) Pass the governor rod through the rod spring, and then connect to the throttle lever of the carburetor. (c) Attach the governor rod and rod spring to the governor lever, then mount the governor lever on the governor shaft.
  • Page 46 NOTE: Be sure to remove any tape or cloth used to cover the exhaust port when the engine was disassembled. (EK13, 17, 20) Gasket CYLINDER SIDE MUFFLER SIDE * Gasket for EK28, 30 it is not necessary to care about its direction.
  • Page 47 EK13, 17, 20 EK28 M8X12L M8X16L M8 Nut with SP washer 2pcs EK30 - Mount the muffler - Mount the muffler cover M6X8L 4pcs M8 Nut: 2 pcs. M8 × 12 mm Bolt...
  • Page 48 Oil capacity in the Oil Bath (oil pan) : (mL) EK13/17/20 ..... 50 EK28/30 ......105...
  • Page 49 (25) FILLING WITH ENGINE OIL Use the automobile engine oil of API service class SE or higher grade. The amount of oil, refer to the table below. EK13 EK17 EK20 EK28 EK30 Model Engine oil volume 0.55 maximum : L...

  • Page 50: Engine Oil

    6. ENGINE OIL Using engine oil of the correct grade and viscosity greatly lengthens engine life and improves performance. Too much or too little oil can also result in serious problems, including engine seizure. 6-1 CLASSIFICATION BY OIL GRADE API (American Petroleum Institute) Classification Grades suited for Robin Engine: SE or higher (SG, SH or SJ in recommended) ...

  • Page 51: Magneto

    7. MAGNETO 7-1 MAGNETO The Subaru Engine uses a T.I.C. type breaker less magneto ignition system. (1) T.I.C. (TRANSISTOR IGNITER CIRCUIT) has the ignition coil outside the flywheel, which is the standard specification. A charge coil system is available as an option. (The flywheel is a specialized piece of equipment.) As for the lighting coil, the ignition coil is outside the flywheel and a lighting coil is inside.

  • Page 52: Ignition System

    8. IGNITION SYSTEM The ignition system is a pointless flywheel magneto with automatic advancing characteristic. Being different from the breaker point type ignition system, this system is completely free from such troubles as starting-up failure due to dirty, burnt or corroded point surface. 8-1 IGNITION COIL INTERNAL CIRCUIT 8-2 BASIC THEORY Primary Coil...

  • Page 53: Wiring Diagram

    9. WIRING DIAGRAM 9-1 MODEL WITHOUT ELECTRIC STARTER Ignition coil Stop switch Magneto Spark plug Flywheel 10. ELECTRIC STARTER...

  • Page 54: Oil Sensor

    11. OIL SENSOR Not available...

  • Page 55: Automatic Decompression System

    12. AUTOMATIC DECOMPRESSION SYSTEM 12-1 FUNCTIONS AND CONSTRUCTION EK series engines employ an automatic decompression system as a standard feature. This enables easy starting of the engine, with lighter recoil pulling force. The automatic decompression system releases the compression of the engine by lifting up the tappet for exhaust valve at cranking speed.

  • Page 56: Carburetor

    13. CARBURETOR 13-1 SPECIFICATIONS (STD) Model EK13 EK17 EK20 EK28 EK30 A/C Type Oil bath Oil bath Oil bath Oil bath Main Jet 66.3 102.5 102.5 Pilot Jet 48.8 47.5 57.5 51.3 Venturi Bore φ12-18 14-20 15-20 16-24 16-24 - Throttle Bore...
  • Page 57 engine. 13-2-4 CHOKE SYSTEM The choke system is for easier start of the engine in cold weather conditions. When the engine is started with a closed choke, the negative pressure applied to the main nozzle increases. This causes a larger amount of fuel to be drawn into the carburetor, which in turn makes it easier to start the engine.
  • Page 58 13-3-3 SLOW SYSTEM (1) Remove the pilot jet ⑧. Use the correct tool so as to avoid damaging the jet. (2) When reassembling the pilot jet, be sure to firmly tighten it, otherwise fuel may leak, leading to engine malfunction. 13-3-4 MAIN SYSTEM (1) Remove the bolt ①...

  • Page 59: Recoil Starter

    14. RECOIL STARTER 14-1 RECOIL STARTER Tools required: Screwdriver, pliers and protective glasses 14-1-1 DISASSEMBLY PROCEDURE (1) Remove the recoil starter from engine. (2) Pull the starter knob to draw out the starter rope by about 30 cm and tie a tentative knot. (3) Untie the knot inside the knob to remove the knob.
  • Page 60 14-1-2 REASSEMBLY PROCEDURE CAUTION Put on the protective glasses prior to start reassembly. (1) Put the reel back into the case -Adjust the position of the inner end of the spring in the reel. -Hold the reel in such a way that the inner end of the spring hooks onto the shaft hook and then place the reel carefully back into the case.
  • Page 61 14-1-3 OTHER GUIDES (1) If the spring escapes from the reel during disassembly (a) Hook the outer end of the spring onto the gap in the reel, and rewind the spring, holding the spring with your fingers so as to prevent it from springing out of the housing unit.

  • Page 62: Troubleshooting

    15. TROUBLE SHOOTING If the engine shows any sign of malfunction, the cause should be determined immediately and appropriate countermeasures should be taken to prevent the problem from worsening. This section describes certain known problems, their possible causes and appropriate countermeasures. Note, however, that the list of problems presented here is not all.
  • Page 63 Problem and possible cause Remedy 1. Insufficient 1) Loosen spark plug Retighten; replace gasket compression 2) Leakage from cylinder head gasket Retighten; replace gasket 3) Piston ring seizure or wear Replace 4) Piston or cylinder wear Repair or replace 5) Incorrect valve and seat contact Repair or replace 6) Valve stem seizure Repair or replace...
  • Page 64 Problem and possible cause Remedy 1. Oil leakage 1) Loose oil drain plug Tighten 2) Faulty oil drain gasket Replace 3) Loose main bearing cover bolts Tighten 4) Faulty main bearing cover gasket Replace 5) Crankshaft oil seal (front, rear) defect Replace 2.
  • Page 65 15-2 ELECTRIC STARTER...

  • Page 66: Standard Repair Tables

    Good No good No good Intake and Exhaust 1.1 – 1.4 mm EK13, 17 20 1.0 – 1.3 mm EK28, 30 Contact rate to those valve seat 85% and more a) Scrape the valve seat face by valve seat cutter (45 degree), slightly...
  • Page 67 ・Intake/exhaust valve guide inner diameter (mm) Limit Model EK13, 17, 20 5.500-5.512 5.65 Intake Exhaust EK28, 30 6.500-6.515 6.65 ・Rocker arm pin support inner diameter (mm) Pin outer diameter D1, D2 Limit Model EK13, 17, 20 9.975-9.900 9.95 Intake Exhaust EK28 12.000-12.018...
  • Page 68 2) CYLINDER ・Inner diameter (mm) Limit Model EK13 61.000-61.015 61.115 EK17 67.000-67.015 67.115 EK20 72.000-72.015 72.115 EK28 79.000-79.015 79.115 EK30 80.000-80.015 80.115 Model First re-boring (0.25) Limit EK13 61.250-61.265 61.365 EK17 67.250-67.265 67.365 EK20 72.250-72.265 72.365 EK28 79.250-79.265 79.365 EK30 80.250-80.265...
  • Page 69 Model Oversize +0.50 Limit Model Oversize +0.25 Limit EK13 61.465-61.480 61.365 EK13 61.215-61.230 61.115 EK17 67.465-67.480 67.365 EK17 67.215-67.230 67.115 EK20 72.465-72.480 72.365 EK20 72.215-72.230 72.115 EK28 79.465-79.480 79.365 EK28 79.215-79.230 79.115 EK30 80.475-80.485 80.375 EK30 80.225-80.235 80.125 ・Ring groove side clearance (mm)
  • Page 70 Model Limit EK13 EK17 0.020-0.050 0.25 EK20 EK28 EK30 0.015-0.040 0.25 ・Piston ring end gap (mm) a) EK13 / EK17 / EK20 / EK28 Limit Top ring 0.2-0.4 2nd ring 0.2-0.4 Oil ring 0.2-0.7 b) EK30 Limit Top ring 0.10-0.25 2nd ring 0.08-0.28...
  • Page 71 EK13 25.500-25.515 25.6 EK17 30.000-30.015 30.1 EK20 EK28 33.500-33.515 33.6 EK30 *Connecting rod bolt tightening torque EK13/17/20: 11 N･m EK28: 26 N･m EK30: 17 N･m ・Clearance between large end and crank pin (mm) Model Limit EK13 EK17 0.015-0.040 EK20 EK28 0.020-0.045...
  • Page 72 14.966-14.984 24.980-24.993 14.95 24.95 EK20 EK28 17.966-17.984 29.980-29.993 17.95 29.95 EK30 7) VALVE ・Valve stem outside dia. (mm) Limit Model EK13, 17, 20 5.442-5.460 5.30 Intake EK28, 30 6.443-6.455 6.30 EK13, 17, 20 5.440-5.460 5.30 Exhaust EK28, 30 6.440-6.460 6.30...
  • Page 73 ・Clearance between valve stem and valve guide (mm) Limit Model EK13, 17, 20 0.040-0.070 Intake EK28, 30 0.045-0.072 EK13, 17, 20 0.040-0.072 Exhaust EK28, 30 0.040-0.075 ・Valve clearance (in cold state) (mm) Model Limit EK13 0.15-0.20 0.25 EK17 0.10-0.15 0.25 EK20 0.12-0.17...
  • Page 74 ・ Tappet guide inside dia. (mm) Model Limit EK13 EK17 EK20 8.010-8.035 8.08 EK28 EK30 ・Tappet guide clearance (mm) Model Limit EK13 EK17 EK20 0.035-0.075 EK28 EK30 9) VALVE SPRING FREE LENGTH (mm) Model Limit EK13 EK17 31.8-32.3 31.5 EK20 EK28 36.5-37.0...

  • Page 75: Service Data (The Following Are Only For Your Reference.)

    16-2 SERVICE DATA (The following are only for your reference.) EK13 EK17 EK20 EK28 EK30 Compression pressure kPa (kgf/cm ) / 500 rpm Fuel consumption Continuous load / 3600 rpm (L / Hr) Capacity 0.55 Lubricant Effective Capacity 0.25 0.26 0.26...

  • Page 76: Tightening Torque

    16-4 TIGHTENING TORQUE Tightening Torque [N･m (kgf･cm)]  ITEM  STD  Range  Remarks  EK13,17  New  15 (150)  10‑20 (100‑200)      EK20,28  Re‑use  25 (250)  23‑27 (230‑270)      Spark plug  New  13.5 (138)  12‑15 (120‑150)      EK30  Re‑use  25 (250)  23‑27 (230‑270)      Rocker arm rock nut (EK13,17,20,28)  10 (100)  8‑13 (80‑130)  oil the screw thread  Pivot bolt (EK30)  8 (80)  7‑9 (70‑90)  oil the screw thread ...

  • Page 77: Maintenance And Storage

    17. MAINTENANCE AND STORAGE The maintenance jobs described below apply to correct use of the engine under normal conditions. The maintenance intervals mentioned in this section are not a guarantee that no maintenance is required during those intervals. For example, when the engine is used in dusty conditions, the air cleaner should be cleaned every day, rather than every 100 hours.
  • Page 78 17-5 INSPECTION AND MAINTENANCE EVERY 300 HOURS MAINTENACE ITEMS REASON / REMARKS (1) Inspect the intake and exhaust valve clearance. (1) Incorrect clearance can cause low power output Adjust if necessary. and engine malfunction. 17-6 INSPECTION AND MAINTENANCE EVERY 500 TO 600 HOURS (EVERY 6 MONTHS) MAINTENACE ITEMS REASON / REMARKS (1) Remove the cylinder head and remove any...
  • Page 79 17-9 ENGINE STORAGE (1) Carry out the maintenance jobs described in step 18-1 above. (2) Drain fuel from the fuel tank and carburetor float chamber. (3) To prevent rust in the cylinder bore, inject oil through the spark plug hole, pull the recoil starter knob gently 2 or 3 times and then put back the spark plug.
  • Page 80 ISSUE EMD-ES7820 December 2014...

This manual is also suitable for:

Ek17Ek20Ek28Ek30

Table of Contents