Makita EK7651H Support Question

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Question posted by villanuevajeEJNQsse8 on June 25th, 2022

No Spark

I have a Makita EK7651H and the ignition coil will not generate a spark when trying to pull start the engine. I removed the flywheel cover and the spark plug from the engine. When I attached my drill to turn the flywheel, it generated a spark at a higher rpm. A higher rpm than what it would turn using the recoil. What could the problem be? A weak ignition coil, or degenerated magnets on the flywheel? By the way, the air gap between the flywheel, and the ignition coil, is 3mm.

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Answer #1: Posted by SonuKumar on June 25th, 2022 9:05 PM

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Answer #2: Posted by hzplj9 on June 26th, 2022 1:21 PM

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Test the ignition coil for continuity. The primary should read around 4 ohms and the resistance from the plug cap should read around 10K ohm +. This gives a ratio of about 10 to one. So giving a high voltage at the plug cap. Both connections should read to the ground (body). This would give you a good idea if the coil has failed. A faulty spark plug, shorted or open circuit is always the first suspect. Check for help on youtube for advice on coil testing.

Hope that helps.

Related Makita EK7651H Manual Pages

Owners Manual - Page 2

...Starting 16 Adjusting the carburetor 17 MAINTENANCE 17 V-belt 18 Cleaning the protection hood 18 Cleaning/changing the air filter 19 Spark plug maintenance 20 Replacing the suction head 20 Cleaning the starter 21 Changing the cutting attachment...Storage 26 Packing Your MAKITA Power Cutter is consequently reuseable or suitable for purchasing a MAKITA product! Failure to observe...

Owners Manual - Page 11

...Starting system Recoil system Fuel consumption at max. spindle speed rpm 4,300 Carburetor Type Diaphragm type Ignition...Canada) NOTE: This spark ignition system complies with speed limitation) Type Non-contact, magnet type Spark plug Type NGK CMR6H ...m/s2 2.8 - no . Technical data Item Engine Displacement Model cid (cm3) EK7650H EK7651H 4.61 (75.6) EK7651HD Bore in (mm)...

Owners Manual - Page 12

... 4. Protection hood 8. Muffler 11. Fuel tank cap 14. Outer flange 17. Safety locking button 20. nut 10. Filter cover 3. Top cover 6. Hex. Oil tank cap 13. Switch 19. Rear handle 2. Top cover for air filter and spark plug cap 5. Fuel pump (Primmer) 15. Cutting disc 16. Front handle 7. Starter grip 12. Throttle lever 5 4 6 7 3 2 1 14 10...

Owners Manual - Page 13

...turn off the engine and pull off the spark plug cap before doing any work , use the ring that matches the bore of the cutting disc and the diameter of the pressure water system is installed in the hole in the tool, remove... (2) into the hole (8) to use rings that on the wheel cover may slip during cutting. 13 CAUTION: Start the Power Cutter only after complete assembly and inspection. 4 5 ...

Owners Manual - Page 16

...Move at maximum idling speed, as the engine starts, the cutting disc will flood the engine with a hand. (4) Vigorously pull the start the engine in the [I] (operating) position, and start up difficult. • If the engine does become flooded with fuel, remove the spark plug, and slowly pull the starter handle several times. Starting up when engine is wrongly moved to the position to...

Owners Manual - Page 17

..., remove the cutting disc, pull the plug cap off dirt from inadvertent start up. • Start the Power Cutter only after stopping the engine or with a clean air filter. The carburetor also has a fixed jet which cannot be manipulated by a specialist MAKITA service center! A tachometer is imperative to carry out maintenance. 17 NOTE: • Wipe off the spark plug...

Owners Manual - Page 18

...Loosen belt cover tightening nuts. (2) Turn the tension adjustment screw to the right (clockwise) until the end of the screw is visible. (2) Remove tightening nuts, and then remove belt cover. (3) Next, remove the three mounting screws, and remove the clutch cover. (4) Remove the old .... Now, remount the clutch cover followed by a MAKITA service centre before being used again! V-belt 1.

Owners Manual - Page 20

...the top cover. (2) Open plug cover, remove plug cap, and remove spark plug. (3) Check to the carburetor. Empty fuel tank. Cover lock Loosen Top cover Plug cap 00..55 mmmm Replacing the suction head The fuel tank filter (13) of wire bent at one . (5) After carrying out maintenance on spark plug, clean, and then remount. To remove the suction head for replacement, pull it to...

Owners Manual - Page 24

... Carburetor Engine starts, but dies Fuel supply immediately Insufficient performance Several systems may simultaneously be affected Observation Engine runs Cause Damage to use designated and genuine parts and consumables. Rinse off coarse dirt in fuel supply or compression system, mechanical defect No ignition spark STOP-switch operated, wiring fault or short circuit, spark plug or...

Owners Manual - Page 25

...Make request for the check items, open the throttle by about 1/3 and start still, remove spark plug, make electrode dry, and reassemble them as specified. Clogged fuel filter ...the description of spark plug Abnormal carburetor Starter rope cannot be pulled Abnormal drive system Contaminated clutch and around parts Insufficient warm-up . If engine will not start the engine. 25 Troubleshooting...

Owners Manual - Page 26

Storage WARNING: When draining out fuel, always stop the engine, let it stops. (6) Remove the spark plug, and drain out the few drops of engine oil from the socket hole. (7) Slowly pull the starter handle, to circulate oil throughout the engine, and then remount the spark plug. (8) Place the drained off fuel in a proper fuel container, and store in a shaded...

Owners Manual - Page 28

... system's warranty on your 2007 and later small off -road engine owner, you should contact: * F or the nearest Makita service center, please visit www.makitatools.com * For technical support or questions regarding operation of our tools and accessories call: 1-800-4-MAKITA * Makita USA Inc. Makita USA, Inc must be completed in the written instructions required by...

Owners Manual - Page 29

... in the 2007 and later Owner's Manual. Makita USA, Inc will furnish with each subsequent owner of the engine. b. c. Clean or replace dust bag filter (Dust bag). (ii) Dust bag filter (Dust bag) (iii) Paper filter (Air filter) (3) Ignition System (i) Spark Plugs. (ii) Magneto or electronic ignition system. (iii) Spark advance/retard system. (4) Miscellaneous Items Used in...

Owners Manual - Page 30

...iv) Choke System, if applicable 3) Ignition System (i) Spark plug (ii) Flywheel Magneto (iii) Ignition Coil 2) Air Induction System (i) Air cleaner plate (ii) Air cleaner case (iii) Air cleaner element 4) Miscellaneous Items Used in Above Systems (i) Fuel hoses, clamps and sealing gaskets 30 Environmental Protection Agency (EPA), and that the engine is applicable in materials and workmanship...

Parts Breakdown - Page 6

Select bulletin name or attachment to view. SOCKET HEAD BOLT M5X16 4 52 318712-4 GUARD 1 53 140903-7 TOP COVER COMPLETE 1 54 266692-7 THUMB SCREW M6X15 1 Page 6 of 11...26 898274-3 INDICATION LABEL 1 27 424583-0 PLUG 1 28 452742-6 REAR INNER HOLDER 1 29 266475-5 TAPPING SCREW TORX 5.5X20 1 30 424404-6 REAR FOOT 1 31 869686-7 EK7651H NAME PLATE 1 33 452737-9 CLAMP 1 ...

Parts Breakdown - Page 7

...-7 TUBE 3-8 1 92 318708-5 ROCKER COVER 1 93 452726-4 OIL LINE 1 94 345918-1 HOSE CLAMP 1 95 422078-7 TUBE 5-70 1 96 345918-1 HOSE CLAMP 1 97 422076-1 TUBE 3-170 1 98 126006-1 IGNITION COIL ASSEMBLY 1 99 424105-6 PLUG CAP 1 100 125920-8 IGNITION COIL 1 101 326148-3 PLUG CAP SPRING 1 102 168652-4 SPARK PLUG CMR6H, EK7651H 1 103 125946-0 CYLINDER HEAD ASSEMBLY...

Parts Breakdown - Page 8

...L 1 134 313210-3 CAM LIFTER R 1 135 442168-0 CAM GEAR GASKET 1 136 318725-5 CAM GEAR COVER 1 137 266652-9 H.L. SOCKET HEAD BOLT M5X16 1 163 345918-1 HOSE CLAMP 1 164 168655-8 OIL TUBE...H.L. PARTS BREAKDOWN PARTrSev B2_R11E/13A/2K01D3 OWN EK7651H EK7651HD EM4251 Products with multiple versions are attached. Select bulletin name or attachment to view. SOCKET HEAD BOLT M6X30 1 ...

Parts Breakdown - Page 9

... 1 224 266690-1 HEX. No. Select bulletin name or attachment to view. SOCKET HEAD BOLT M5X16 1 180 452616-1 FAN COVER 1 181 266655-3 H.L. SOCKET HEAD BOLT M6X30 1 183 ... TENSION SPRING 6 3 200 313207-2 CLUTCH SHOE 3 201 313208-0 CLUTCH HOLDER 1 202 893121-3 EK7651H MODEL NO.LABEL 1 203 266792-3 H.L. BOLT M8X12 1 170 266652-9 H.L. Description Q'ty Unit ...

Parts Breakdown - Page 10

...EK7651H EK7651HD EM4251 Products with the newest version on top not indented. Corresponding bulletins are listed in subsiding order with multiple versions are attached. Part No. LABEL 1 A01 195488-8 TOOL... SHAFT 1 236 266688-8 HEX. Select bulletin name or attachment to view. No. BOLT M8X25 1 252 452698-3 BELT COVER 1 253 266691-9 TENSIONING SCREW M6 1 254 234215-9 ...

Flyer (English) - Page 2

... on hand. All models and accessories subject to the Makita General Catalog or visit our website at makitatools.com, or call 1-800-4MAKITA. 14'' MM4™ 4-STROKE POWER CUTTER Model EK7651H FEATURES & BENEFITS n Automatic engine decompression valve is engineered into the cam gear to reduce pull start force by keeping out dust and debris n Cutting arm...