Service manual Model
CONTENTS Ⅰ.SPECIFICATIONS ・・・・・・・・・・・・・・・・・・ ２ 1.SPECIFICATIONS ・・・・・・・・・・・・・・・・・・・・２ 2.PART NAMES ・・・・・・・・・・・・・・・・・・・・・・３ Ⅱ.PREPARATIONS ・・・・・・・・・・・・・・・・・・・・ ４ 1.PREPARATIONS・・・・・・・・・・・・・・・・・・・・・４ 2.NOTICE・・・・・・・・・・・・・・・・・・・・・・・・４ Ⅲ.DISASSEMBLY AND REASSEMBLY PROCEDURE・・・ ５∼５２ 1.EQUIPMENT DISASSEMBLY ・・・・・・・・・・・・ ５∼１５ 2.EQUIPMENT REASSEMBLY ・・・・・・・・・・・・１６ ∼２７ 3.ENGINE DISASSEMBLY・・・・・・・・・・・・・ ２８∼３６ 4.ENGINE REASSEMBLY ・・・・・・・・・・・・・ ３７∼４７ 5.CARBURETOR DISASSEMBLY AND REASSEMBLY・・・・ ４８∼４９ 6.
Ⅰ．SPECIFICATIONS 1.SPECIFICATIONS SPECIFICATIONS Product Name Engine Blower Type BBX7600 Dimensions(LXWXH) mm 350×430×495（13.7×16.9×19.5in only for body） Dry Weight kg 10.2（22.4lbs only for body） Model EH075F Type Air-Cooled,4-Stroke,Upright Single-Cylinder OHV Gasoline Engine Piston Displacement mL 75.6 Fuel Automotive Unleaded Gasoline Engine Fuel Tank Capacity L Engine Oil 1.9（64.2 fl.
2.Part Name OPTION DESIGNATION OF PARTS DESIGNATION OF PARTS DESIGNATION OF PARTS DESIGNATION OF PARTS 1. Stop switch 8. Choke Lever 15. Plug Cover 22. Blower Pipe 2. Control Handle 9. Starter Handle 16. Spark Plug 23. Blower Nozzle L=450 3. Trigger Lever 10. Fuel Tank 17. Oil Cap 24. Hose Band φ100 4. Cruise Control Lever 11. Fuel Tank Cap 18. Oil Drain Bolt 25. Hose Band φ76 5. Primer Pump 12. Muffler 19. Elbow 26. Blower Nozzle L=200 6. Cover Aircleaner 13. Shoulder Strap 20.
Ⅱ．PREPARATIONS 1.PREPARATIONS (1)Workbench (2)Tool for disassembly and reassembly (3)Wash-pan (4)Wash oil (light oil,gasoline,etc) (5)Automotive 4-stroke engine oil,grease (6)Liquid packing (7)File,sand paper (8)Waste 2.NOTICE (1) Use the standard tools properly. (2) While disassembling the engine blower,memorize the locations of individual parts so that they can be reassembled correctly. Attach a tag to a part you are uncertain about its mounting position.
Ⅲ．DISASSEMBLY AND REASSEMBLY PROCEDURE 1.EQUIPMENT DISASSEMBLY For further disassembling instructions on each part, see the corresponding pages. Fastener PCS step Part of remove Procedure 1)Unscrew the DRAIN,BOLT 1 ENGINE OIL For further instructions (5−1) and CAP,OIL(5−2) on the engine oil draining, 2)Drain the ENGINE OIL. see page 60. 3)Screw the DRAIN BOLT and CAP,OIL. 2 Fuel 1)Drain the fuel. 1)Remove the COVER,AIR 3 COVER,AIR CLEANER CLEANER. P9 2)Remove the AIR CLEANER ELEMENT.
Deal Drawing of Equipment NUT O-RING ELBOW WIRE BAND (Tie-wrap) BASE 2 IMPELLER NUT,SQUARE SCREW ASSY CASE 2,COMPL BASE 1 SOCKET HEAD BOLT SCREW DAMPER 2 COMPL SOCKET HEAD BOLT C STARTER REWIND COVER,PLUG SCREW ASSY A COVER,INLET CASE 1,VOLUTE WASHER GUARD,MUFFLER COVER,INLET TAPPING SCREW TAPPING SCREW TAPPING SCREW GUARD,OIL COVER,ENGINE TUBE TUBE ASSY BREATHER HOSE CLAMP FILTER C TANK FUEL COMPL SCREW ASSY RIVET LOCK B A RIVET LOCK GUARD COMPL(NET) CAP,FUEL TANK ASSY B FRAME CUSHION
Deal Drawing of Equipment(AIR CLEANER) KNOB BOLT COVER,AIR CLEANER ELEMENT,AIR CLEANER PLATE,SEPARATOR CHECK VALVE PLATE,CHECK VALVE CASE,AIR CLEANER COMPL TUBE(L=130) TUBE(L=190) CHECK VALVE HOSE CLAMP HOSE CLAMP TUBE(L=25) PIPE,JOINT CASE,INTAKE ASSY SCREW ASSY DUCT,AIR CLEANER 7
Deal Drawing of Equipment(CONTROL LEVER) CASE 1,LEVER COMPL SWITCH COMPL TORSHION SPRING LEVER 1,THROTTLE SELF LOCK NUT CASE 2,LEVER COMPL LEVER 2,THROTTLE WASHER WAVE WASHER SCREW SOCKET HEAD BOLT TAPPING SCREW CONTROL CABLE NUT TUBE CABLE 8
NO. 3 Part name Disassembling Instructions COVER,AIR CLEANER KNOB BOLT ELEMENT DUCT HOSE CLAMP (1) Remove the COVER,AIR CLEANER by looseninig KNOB BOLTS. (2) Remove the DUCT by looseninig HODE CLAMPS.
NO. 4 Part name Disassembling Instructions COVER,ENGINE COVER,PLUG GUARD,OIL STARTER (1) Remove the GUARD,OIL. (2) Remove the STARTER. (3) Remove the COVER,ENGINE. NOTICE: Be careful not to loose the GUARD, OIL or COVER, PLUG. COVER,PLUG COVER, ENGINE GUARD, OIL SCREW M5*20 (3PCS) TAPPING SCREW 5*16 (4PCS) 5 TANK,FUEL STARTER (1) Remove the fuel tube. NOTICE:The fuel will spout if the fuel tube is removed with the fuel tank filled with fuel. (2) Remove the TANK,FUEL.
NO. 6 Part name Disassembling Instructions LEVER (CONTROL CABLE ,WIRING) (1) Disconnect the wiring. (2) Disconnect the CONTROL CABLE from the CARBURETOR. (1) (2) For instructions on the lever disassembling, see pages 14 and 15. 7 CASE, AIR CLEANER ∼CASE,VOLUTE (1) Remove the CASE,AIR CLEANER. (2) Disconnect the two tubes connected to the air cleaner. ROCKER COVER∼AIR CLEANER SCREW M5*16 W,SW (4PCS) AIR CLEANER∼CYLINDER 7-1 Instructions on the CASE, AIR CLEANER disassembling.
NO. 8 Part name Disassembling Instructions FRAME (1) Remove the FRAME. SCREW M5*16 W,SW MEC (2PCS) FRANGE NUT M6（2PCS） 9 CASE 1,VOLUTE DAMPER 2 ELBOW O-RING (1) Remove the CASE 1,VOLUTE. N O TICE : Be careful not to loose the nuts.
NO. Part name Disassembling Instructions 10 IMPELLER (1) Remove the IMPELLER. IMPELLER SOCKET HEAD BOLT M6*40 W, SW (4PCS) 11 ENGINE ∼CASE 2 ,VOLUTE (1) Remove the ENGINE.
NO. 6-1 Part name Disassembling Instructions LEVER CASE 1,LEVER CASE 2,LEVER ASSY (1) Remove the CASE 1,LEVER and CASE 2,LEVER ASSY.
NO. 6-1 Part name Disassembling Instructions LEVER CASE 2,LEVER ASSY LEVER 2,THROTTLE (2) Remove the LEVER 2,THROTTLE from the CASE 2, LEVER ASSY.
2.EQUIPMENT REASSEMBLY Equipment reassembly procedure 1.Notice ・ Clean parts completely. ・ Replace screws with new ones if necessary. ・ Tighten up the tightening torque specified parts according to the specified tightening torque. 2. Tightening torque of each part For further assembling instructions on each part, see the corresponding pages. No.
NO. 1 Part name Assembling Instructions ENGINE ∼CASE 2,VOLUTE ∼BASE 1,2 (1) Fix the ENGINE to the CASE 2,VOLUTE with the knock positions united. (2) Be careful not to leave the high tension code and wire between the CASE 2,VOLUTE and ENGINE. (3) Install the GASKET,MUFFLER on the CASE 2,VOLUTE rib with the number (a) as shown in the photograph. (3) (a) OK BASE 1,2 NG Screwing sequence Screw the SOCKET HEAD BOLTS in numerical serial sequence (①−⑥).
NO. 3 Part name Assembling Instructions CASE 1,VOLUTE DAMPER 2 ELBPW O-RING (1) Fit the DAMPER 2s in the groove of the CASE 2,VOLUTE. (2) Install the ELBOW with its outlet directed toward the CASE 1,VOLUTE. (3) Screw the TAPPING SCREWS clockwise beginning with the one at the ELBOW side. TAPPING SCREW 5*16(9PCS) Tightening torque 20+5 0 ㎏ｆ ･㎝ NUT M5 BLACK O-RING Fit the O-RING in the inner top groove of the ELBOW. (Apply silicon or grease over the ring before fitting it.
NO. Part name 5 FRAME CUSHION Assembling Instructions Tighten the SCREW with the tightening torque as shown in the preceding page after the FRAME assembling. FRAME RIVET ROCK（6PCS） FRANGE NUT M6（2 ヶ） Tightening torque 25 6 FRAME ∼NET +15 0 ㎏ｆ ･㎝ CUSHION SCREW M5*16 W,SW MEC(2PCS) Tightening torque 25 +15 ㎏ｆ ･㎝ 0 (1) Install the NET on the FRAME by screwing the SCREW RIVETS.
NO. 7 Part name Assembling Instructions CASE, AIR CLEANER (1) Install the tubes correctly as shown in the photographs below. Apply silicon or oil over the inserting part of the tubes before installing them, if necessary.
NO. 9 Part name Assembling Instructions LEVER (CONTROL CABLE &WIRING) (1) Insert the inner cable of the CONTROL CABLE into the CARBURETOR’S adjusting bolt and fit it in the SWIVEL groove. (2) Fit the outer cable of the CONTROL CABLE and high-tension code in the groove of the CASE 2,VOLUTE. (The CONTROL CABLE should be under the high-tension code.) (3) Connect the WIRES from the LEVER and the ones of the COIL, and hold the CONTROL CABLE and connected wire using the clamp of the CASE 2,VOLUTE.
NO. 10 Part name Assembling Instructions GUARD, MUFFLER ∼COVER, ENGINE (1) Fold the GUARD,MUFFLER as shown in the photographs. (2) Put the GUARD,MUFFLER in the COVER, ENGINE along its rail, and fit the COVER, ENGINE at its protruding portion into the groove of the GUARD, MUFFLER. (3) Fix the GUARD, MUFFLER to the COVER, ENGINE with the TAPPING SCREW. Folded part Details on being folded (1) (2) TAPPING SCREW 4*6 Tightening torque 10 N O T I C E : Be sure to install the GUARD, MUFFLER.
NO. 12 Part name Assembling Instructions ELEMENT COVER,AIR CLEANER KNOB BOLT DUCT HOSE CLAMP (1) The KNOB BOLTS may be screwed with the hand. (2) The tightening torque of the HOSE CLAMP bolt should be 15kgf･cm. (3) Be careful that the DUCT fitted in is not covered with the COVER,AIR CLEANER. KNOB BOLT COVER,AIR CLEANER ELEMENT HOSE CLAMP Fit in the hose clamp with the bolt directed upward.
NO. 13-1 Part name Assembling Instructions LEVER CASE 2,LEVER LEVER 2,THROTTLE (1) Fit the throttle lever in the CASE 2,LEVER using the SOCKET HEAD BOLT, WAVE WASHER, WASHER, and SELF LOCK NUT.
NO. Part name Assembling Instructions 13-3 CASE 1,LEVER CASE 2,LEVER (1) Join the CASE 2,LEVER (fitted in according to no.13-1) and CASE 1,LEVER (fitted in according to no.13-2) together. CASE 2,LEVER NUT M5 (1PCS) Used to tighten the lever on the SWIVEL PIPE (see no.14). TAPPING SCREW 4*16 (5PCS) Tightening torque 5∼8kgf・cm SCREW M5*25 (1PCS) Used to tighten the lever on the SWIVEL PIPE (see no.14).
NO. 14 Part name Assembling Instructions PIPE (1) Fit the straight pipe with the SWIVEL PIPE in the FLEXIBLE PIPE and tighten the HOSE CLAMPφ76. (2) Install the LEVER onto the straight pipe with the SWIVEL PIPE and tighten the clamp screw and nut. (3) Fit the FLEXIBLE PIPE in the ELBOW on the blower and tighten the HOSE CLAMP φ100. (4) Insert the BLOWER PIPE into the SWIVEL PIPE. and turn the BLOWER PIPE clockwise to tighten it. Insert the BLOWER NOZZLE into the BLOWER PIPE.
NO. 15 Part name Assembling Instructions BAND (1) Loop the end of the BAND through the lower part of the HANGER as shown in the figure at right. The side of the BAND that has the folded tip should be facing outwards. Then, bring the end of the BAND back over the HANGER and thread the remaining length of the BAND through the BUCKLE. Tighten the BUCKLE by pushing it towards the HANGER in the direction of the arrow shown in the drawing while pulling on the BAND in the opposite direction.
3.ENGINE DISASSEMBLY step 1 2 3 For further disassembling instructions on each part, see the corresponding pages. Part of remove Procedure Fastener PCS Special tool Notice M10 PULLEY 1)Remove the PULLEY. 1 (width across flat P29 15) CASE,INTAKE 1)Remove the CASE,INTAKE. M5X65mm 2 Fasten with the CARBURETOR P29 M5X25mm 2 1)Remove the INSULATOR. INSULATOR M5X12mm 1 2)Remove the TUBE from the Use a small flat-head screwdriver for small flat-head P29 CYLINDER side.
1 Part name Disassembling Instructions PULLEY 1)Remove the PULLEY. PULLEY(M10 width across flats 15) 2 CARBURETOR CASE,INTAKE 1)Remove the GASKET,CARBURETOR and CARBURETOR and CASE,INTAKE.(Fasten with the CARBURETOR) SCREW M5 × 65W,SW(1PCS) 3 INSULATOR 1)Remove the INSULATOR. PIPE,JOINT(T) TUBE(3PCS) 2)Remove the tube from the CYLINDER. NOTICE ：Detach the attached SCREW gasket thoroughly.
Part name 4 MUFFLER Disassembling Instructions 1)Remove the MUFFLER and GASKET,MUFFLER. NOTICE ：Be careful not to loose the washers. SOCKET HEAD BOLT M6 × 70(3PCS) 5 PLUG,SPARK 1)Remove the PLUG,SPARK. PLUG,SPARK (M10) 6 ROCKER COVER 1)Remove the ROCKER COVER and GASKET,ROCKER COVER.
Part name PUSH ROD COVER,CAMGEAR CAM LIFTER CAMGEAR 7 Disassembling Instructions 1)Remove the COVER,CAMGEAR. 2)Remove the PUSH ROD. 3)Remove the CAM LIFTER . 4)Remove the CAMGEAR.
Part name 8 CYLINDER HEAD Disassembling Instructions 1)Remove the CYLINDER HEAD. SOCKET HEAD BOLT M6 × 35 (5PCS) 8-1 ROCKER ARM VALVE 1)Remove the ROCKER ARM and ROCKER SHAFT. 2)Remove the VALVE and SPRING,VALVE and RETAINER,SPRING. Remove the ROCKER SHAFT by hitting with a hammer a metal bar held by the hand on the ROCKER SHAFT at the intake side. EX 側 IN 側 Slide the RETAINER,SPRINGS by pressing the SPRINGS with the RETAINER,SPRINGS, and remove the VALVES.
Part name 9 RETAINER,PLATE CASE,OIL OTHERS Disassembling Instructions 1)Remove the LEAD,VALVE and RETAINER,PLATE. 2)Remove the CASE,OIL. SCREW M5 × 25 W,SW(5PCS) BOLT M8 × 12(1PCS) NOTICE: Be careful not to loose the gasket.
Part name 10 FLYWHEEL COIL Disassembling Instructions 1)Remove the COIL. 2)Remove the FLYWHEEL.
Part name 11 CYLINDER CRANKSHAFT CRANKCASE Disassembling Instructions 1)Ram a flathead screwdriver into the four grooves in turn to remove the CRANKCASE by prying it off with the screwdriver. (see the figure below) 2)Pull the CRANKSHAFT out of the CYLINDER. Be careful not to damage the OIL SEALS. SOCKET HEAD BOLT M6 × 30(6PCS) Grooves (four): Used to remove the CRANKCASE (be careful not to damage the sealing surface).
Part name Disassembling Instructions 12 CRANKSHAFT PISTON PISTON RINGS OIL RING OTHERS 1)Remove the CLIP. 2)Remove the PIN,PISTON. 3)Remove the PISTON RINGS and OIL RING. NOTICE:Widening NOTICE: Widening the open end of the ring might break it. PIN,PISTON CLIP Be careful not to damage the OIL SEAL.
Engine reassembly procedure 1.Notice ・Clean parts completely specifically the PISTON, CYLINDER, CRANKCASE, CRANKSHAFT and BEARINGS. ・Remove completely all the carbon deposit from thr COMBUSTION CHAMBER and the PISTON top. ・ Be careful not to damage the mating face between the CYLINDER HEAD and CYLINDER, and the one between the CYLINDER and CRANKCASE, and not to let any foreign material come into them. ・Test the lip of the OILSEALS for damage.Replace damaged OIL SEALS with new ones.
1 Part name Assembling Instructions CRANKSHAFT PISTON PISTON RINGS OIL RING OTHRS 1)Apply 4-stroke engine oil over the PISTON RINGS and OIL RING after placing them. Position the open end of TOP RING and SECOND RING in the opposite direction. OIL RING assembly order SECOND RING ① SPACER White mark:right ②LOWER SIDE RAIL ③UPPER SIDE RAIL Position each open end of the Fit in the PISTON with parts in a respectively different its “ I mark” mark”directed as position shown in the figure. 120-degree.
Part name 3 CYLINDER HEAD Assembling Instructions 1)Install the VALVE and SPRING,VALVE and RETAINER,SPRING. 2)Install the ROCKER ARM and ROCKER SHAFT. Apply the 4-stroke engine oil over the inner part of VALVE GUIDES and ROCKER SHAFT guides before joining the parts together. Be careful that (the INTAKE VALVE is large EX 側 and EXHAUST VALVE is small). IN 側 Apply the 4-stroke engine oil over the VALVE GUIDE holes before inserting VALVE.
Part name 5 CRANKCASE Assembling Instructions 1)Insert the OIL TUBE into the pipe of the CRANKCASE. Pipe position 6 CYLINDER CRANKSHAFT CRANKCASE 1)Apply the 4-stroke engine oil over the inner wall of the cylinder and sliding surface of the piston. 2)Insert the CRANKSHAFT(PISTON) into the CYLINDER. 3)Apply the silicon system liquid gasket equally over the shaded area of the crankcase as shown in the left figure(ThreeBond 1216 recommended).
Part name 7 FLYWHEEL COIL Assembling Instructions 1)Degrease CRANKSHAFT and FLYWHEEL tapered portion completely before joining them. 2)Attach the SPRING,PLUG CAP to the HIGH-TENSION CODE. 3)Insert the HIGH-TENSION CODE with the SPRING,PLUG CAP into PLUG CAP. 4)Fit the COIL and WIRES in the CRANKASE. (See the figure below. Air gap: 0.3mm). Be careful not SOCKET HEAD BOLT to loose the M4 × 20 W,SW(2PCS) WOODRUFF KEY.
Part name 8 CASE,OIL CRANKCASE OTHERS Assembling Instructions 1)Fit the GASKET,OILCASE , LEAD VALVE and RETAINER,PLATE in the CRANKCASE. 2)Screw the DRAIN BOLT onto the CASE,OIL with the GASKET between them. 3)Join the CRANKCASE and CASE,OIL together. SCREW M5 × 25 W,SW(5PCS) Tightening torque 40 ＋ 015 kgf･cm BOLT M8 × 12(1PCS) Tightening torque 50 ± 10 kgf･cm NOTICE ：Be careful not to fail to place the GASKET.
Assembling Instructions Part name 9 CYLINDER HEAD 1)Attach the CYLINDER HEAD. Tightening sequence SOCKETHEAD BOLT of the SOCKET HEAD BOLT. M6 × 35 (5PCS) Tightening torque 120 ＋ 20 − 10 ⑤ kgf･cm ③ ② GASKET,CYLINDER HEAD ④ ①⑥ Finally tighten again the BOLT that was tightened first. 10 CAMGEAR CAMLIFTER 1)Position the piston to the top dead center. (Make sure that the FLYWHEEL is placed with its magnetic part on the downside-this can be confirmed with the FLYWHEEL counter mark.
Part name Assembling Instructions PUSH ROD 1)Insert the PUSH ROD into the PUSH ROD passage of the COVER,CAMGEAR CYLINDER HEAD. VALVE clearance 2)Make sure that the PUSH ROD is put into the spherical grooves 11 of the CAM LIFTER and ROCKER ARM adjust bolt. 3)Attach the COVER,CAMGEAR. 4)Loosen NUT and adjust VALVE CLEARANCE by rotating ADJUST SCREW with a hexagon bar wrench.
12 Part name Assembling Instructions ROCKER COVER 1)Attach the ROCKER COVER and GASKET,ROCKER COVER. NOTICE:The NOTICE: The breather should be positioned at the plug side. SCREW M5 × 30 W,SW(2PCS) Tightening torque 40 ＋ 150 kgf･cm 13 PLUG,SPARK 1)Attach the PLUG,SPARK. PLUG,SPARK (M10) Tightening torque 110 ± 20 kgf･cm NOTICE: The PLUG,SPARK should be screwed into the threaded screw hole straight. 14 MUFFLER 1)Attach the MUFFLER and GASKET,MUFFLER.
Part name 15 INSULATOR PIPE,JOINT(T) TUBE(3PCS) Assembling Instructions 1)Attach the INSULATOR and GASKET,INSULATOR. 2)Fit the TUBES in the CYLINDER using the PIPE,JOINT(T). (use the correct tubes). 3)Connect the TUBE to the INSULATOR at its joint. N O T I C E ：The GASKET should be placed with its smallest hole positioned SCREW at the upper right. M5 × 25W,SW(2PCS) Tightening torque 40 ＋015 kgf･cm Connect the tube to the Air Cleaner breather (see page 20).
Part name 18 CAP,OIL Assembling Instructions 1)Attach the CAP,OIL. NOTICE:: Be careful not to fail to place the PACKNOTICE ING or fill the tank with oil.
5.CARBURETOR DISASSEMBLY AND REASSEMBLY This engine is equipped with a diaphragm type CARBURETOR. 1) Function and structure of the diaphragm system. Since the fuel level is kept constant, in spite of any tilt angle of the engine, it can be operated at any position. The float chamber is provided with a diaphragm and covered by a cover. Negative pressure in the air intake passage causes the diaphragm to swell upward and thereby pushing up the hinge to open the valve.
3) Notice ①Clean the CARBURETOR using clean gasoline before disassembly. ②Disassemble or reassemble referring to the deal drawing. ③Do not disassemble the THROTTLE VALVE ASSY and PUMP BODY ASSY. 4) Disassembly and reassembly procedure ①Remove the screw (PUMP COVER)and then the PRIMER PUMP COVER. Remove dust clearly from the PRIMER PUMP if any. ②Remove the PUMP BODY ASSY from the body (do not let the SPRING missing). Remove dust clearly from the INLET SCREEN if any. ③Remove the JET from the body.
6． RECOIL STARTER The RECOIL STARTER rarely malfunctions under normal use. When it fails, however, or needs greasing, disassemble and reassemble it according to the following procedure. Tools: Screwdriver and pliers １）Disassembly （１） Remove the RECOIL STARTER from the engine. （２） Pull out the STARTER KNOB, press the ROTARY REEL with your thumb as shown in Fig.6-1 when the REEL cut-out comes to the STARTER ROPE OUTLET, and pull the STARTER ROPE to the inside of the RECOIL STARTER with a screwdriver.
２）Reassembly （１） Run the STARTER ROPE through the STARTER KNOB and make an overhand knot as shown in Fig.6-3.Run the STARTER KNOB at its opposite side from the STARTER CASE to the REEL, make a knot in the same way, and put the ROPE end completely in the ROPE HOUSING of the REEL. Then, apply a small amount of grease over the STARTER SHAFT and SPIRAL SPRING. （２） Make sure that the SPIRAL SPRING is fit completely in the spring groove of the REEL.
３）Check after reassembly （１） Pull the STARTER KNOB a few times: ①If the STARTER KNOB is too heavy to pull, check the associated parts whether they have been reassembled as instructed. ②If the RATCHET fails to function, check whether the parts such as the spring have been missing. （２） Pull the STARTER KNOB to pull out the STARTER ROPE to the end: ①Unwind the STARTER ROPE 1 to 2 turns in the way as shown in Fig.
IV. MALFUNCTION AND REPAIR Trouble Work order CRANKSHAFT does not rotate １−１ Does the CRANKSHAFT rotate by pulling the RECOIL STARTER? １−２ Any breakage in the RECOIL STARTER? １−３ Does the FLYWHEEL touch somewhere? １−４ １−５ １−６ ２−１ PLUG and COIL ２−３ Is the plug gap within 0.7∼0.8 ? Does a new grounded PLUG ignite? ２−７ Replace the IGNITION COIL with a new one. Engine does not start.
Trouble Work order ６−５ ６−６ Disassemble the CARBURETOR to test it for the component parts being clogged up and/or deteriorated. Poor acceleration and output shortage of engine ６−７ ６−８ ６−９ Investigate the leakage and correct it. Replace the packing, etc.with a new one if necessary. Clean the inside of the CARBURETOR. Replace wear out parts, such a s the No trouble in the CARBURETOR diaphragm with new ones. Replace the CARBURETOR with a new one if ６−７ necessary. See P.
V. CHECK AND RECONDITIONING Check and recondition the engine according to the essential criteria for reconditioning after the disassembly and cleaning. the terms used in the criteria for reconditioning are described below: １）Reconditioning To repair, adjust, replace any wrong part of the engine, so that it works like a new one.
VI. CRITERIA FOR RECONDITIONING Criteria for reconditioning of EH075-type engine Part to be repaired CYLINDER BLOCK Bore diameter Inside diameter of valve guide External diameter of skirt in thrust direction (6.1-14.1mm higher from bottom) Width of ring grooves Gauge Adjustment limit Usage limit Remarks Tool If not adjustable φ51 0.06 0.06 φ4 0.10 0.10 -0.04 -0.04 Micrometer Replacement +0.06 +0.06 Vernier calipers Replacement +0.03 0.1 +0.03 0.
Part to be repaired CAM GEAR Height of cam top Adjustment limit Gauge 28.01 -0.6 Usage limit Remarks -0.
VII.NOTIC １） Cleaning of air cleaner element ・Clean the element to avoid an extremely short life as well as poor start, power, and drive of the engine. ・Wipe oil off the air cleaner cover and air cleaner plate breather. ２） Oil supply and change ・Remove dust and dirt around the oil filler, and unscrew the oil gauge integrated oil cap. ・Place the oil gauge integrated oil cap on a place where it can not get dirty with sand and/or dust.
VIII. CARE AND STORAGE Care described below shows the standard procedure required at the correct engine use under usual conditions. Therefore, it will not give you any guarantee such that care is not necessary up to the indicated times. An air cleaner cleaning, for example, is necessary every several (not ten) hours a day during operation in a dust-laden environment.
Ⅸ． CHECK,DRAINAGE AND FEEDING OF ENGINE OIL Recommend ed oil: Robin genuine oil or SAE10W-30 oil of API type SF grade or better (4 stroke motor oil for automobiles) Oil capacity: Approximately 0.22 L (220 ml) 1. Checking a n d R e f i l l i n g Engine Oil ① Follow the procedure below when the engine oil is cold i.e. the blower has not been running. • Inspection ：S e t t h e b l o w e r d o w n o n a l e v e l surface and remove the oil cap.
Ⅹ．VALVE CLEARANCE ADJUSTMENT NO. 1 Part name Instructions COVER,ENGINE GUARD,OIL STARTER (1) Remove the GUARD,OIL. (2) Remove the STARTER. (3) Remove the COVER,ENGINE. COVER,PLUG COVER, ENGINE GUARD, OIL SCREW M5*20 (3PCS) TAPPING SCREW 5*16 (4PCS) 2 TANK,FUEL STARTER (1) Remove the fuel tube. Notice:The fuel will spout if the fuel tube is removed with the TANK,FUEL filled with fuel. (2) Remove the TANK,FUEL.
NO. 3 Part name Instructions ROCKER COVER (1) Remove the ROCKER COVER. ROCKER COVER 4 VALVE CLEARANCE ADJUSTMENT Adjust VALVE clearance at the compression top dead center (1) Position the PISTON to the compression top dead center. 1) Rotate the CRANKSHAFT clockwise holding the PULLEY by the hand until the position of the FLYWHEEL counter marks and CRANKCASE come in a horizontal position. (Removing the PLUG, SPARK will allow the smooth rotation.
ⅩⅠ．AIR CLEANER CLEANING NO. 1 Part name Instructions Interval of Cleaning and Inspection: Daily (every 10 operating hours) (1) Loosen the KNOB BOLT. (2) Remove the COVER, AIR CLEANER. (3) Take out the ELEMENT and remove any dirt with the brush. NOTE: The ELEMENT is a dry type and should not get wet. Never wash with water. (4) Replace the ELEMENT with a new one if it is damaged or very dirty. (Part No.
