Hello – sorry I’m still a bit confused with the last answer. Other options New and used from $12.30. £45.90. Many thanks, spark plug and coil are new and did all the Ohm checks without the stop switch lead attached to the coil. Hi. Flywheel magnets good and have been cleaned. If the blower starts briefly it is likely to be a fuel issue. Briggs & Stratton 398811 Ignition Coil For 7-16 HP Horizontal and Vertical Single Cylinder Engines. If that does not work the only other solution is to begin replacing the electrical components with known working parts until the problem is resolved. More Buying Choices $20.30 (8 used & new offers) MTD Genuine Part 951-11305A Ignition Coil Assembly OEM Part for Troy-Bilt Cub-Cadet Craftsman Bolens Remington Ryobi Yardman Yard-Machine White Huske. Just hold the wire “close” to the block and look for a spark jumping from wire to block. Click & Collect. I need my motor to get by boat out of the harbor, so what can I do to get it started if, indeed, it is the coil? No ohm reading downstream of the resistor. Disconnect the stop switch wire from the flywheel brake and remove the coil. In your case if you have a new plug and have the kill switch disconnected it would be likely that your coil is the faulty component as there is nothing else to cause the fault. It sounds like you have replaced most of the important parts, Coils over 5kohms may well work as the 2.5-5Kohm range is suggested for older models similar to the mower in the video, newer or different models often can have different specs. I’ve replaced the fuel valve, spark plug and ignition coil so far. Briggs and stratton only provide a range of between 2.5 and 5 K ohms as a working range for the coils. I checked the on-off switch and pulled the kill harness off with no success. The magnetron resistance (from spark plug cap tip to magnetron body) was about 11kOhm! If you do get shock. Ignition coil for Briggs & Stratton 590455,793354,799382 Brand: Aftermarket. I would investigate the Off/On Switch contacts and make sure they are not incorrectly configured or damaged as this could be causing the no spark situation. Armature clearance was correct. Hi Drew FitBest Replacement Ignition Coil for Briggs & Stratton Armature Magneto Design 42A707 42A777 422707 394891 392329 590781. 94. Now I’m stumped and we’re supposed to be having an ice storm tonight. Google will show this and one from NGK. That’s unusual with new parts the spark should not be weak. What should the resistance be to the left pole of the magneto? Get it as soon as Wed, Dec 16. Appreciate your keeping this thread alive, and all the help offered. No reading indicates a broken circuit, as reading get higher the spark will weaken until it is no longer present. I plan to remove the resistor from the spark plug cap (and the steel cover) and use a resistor spark plug. Does this mean I have to pull the flywheel? In other words. Your engine repair manual will provide the proper gap for your engine. -Not fuel locked; removed plug and checked for excess fuel Briggs And Stratton Magneto Wiring Diagram – briggs and stratton coil wiring diagram, briggs and stratton ignition coil diagram, briggs and stratton magneto wiring diagram, Every electric arrangement consists of various diverse pieces. Suddenly it died on me a few days ago and I can’t figure out why. Regards, It's impractical to uncover the coil and examine the wire; fortunately, there's an easier way to find a break -- a continuity test. I didn’t bother to try and check the spark and just put the plug in to see what would happen. Step 2. You say here that the kill wire should read 0 ohms to the frame. Checked another identical new coil at dealer…reads 6000 ohms. Wire A - connects to earth Wire B - connects to capacitor/points Wire C - connects to spark plug. I have seen a few Briggs magnetrons and they appear to be similar except for this one with the resistor and steel cover. Most later models use Briggs and Stratton's magnetron coils—essentially a self-contained ignition system that derives its power from the magnets on the flywheel.Testing one of these coils constitutes a relatively simple process. I was initially getting a reading of 9k ohms from my original coil. The stop switch should have no continuity when in the open position and continuity in the closed position. You can run the mower with a standard cap to bypass the included resistor in your current cap. Set the multi-meter to the 20 k ohms setting. £22.99. Does anyone know the resistance values for the coil alone between A and B A and C B and C Thanks. Yes a higher reading means there is more resistance to electrity flow so the spark would be weaker as you get closer to 5K Ohms. If there is continuity between the connector and the ignition coil frame there will be no spark as the coil will be grounded. In this test, you pass a small electric current through the wire and measure resistance with an ohmmeter. 4.4 out of 5 stars 27. So if I’m getting a reading above 5 k ohms does that mean I need to replace the coil? Before starting to replace the wrong parts my question is this, should there be any resistance on the plug cap? Between the kill switch and the HV it also reads 6.5kohms. Any help to get mower running……carb has had overhaul kit installed. I … I have a Briggs & Stratton lawn mower with a Quantum 675 engine (126T024830B1). It is highly unlikely that the magnets have weakened enough to no longer create a electrical current. Yes a resistor spark plug should work fine as a replacement, I have not seen one with a resistor so I suspect they are not very common. My B&S engine has just stopped working and I’ve checked the coil and I get about 2,6kohms between the body of the coil and the HT lead connector. The 2.5-5 reading is only applicable to the coil in the video which is fitted to the smaller briggs and stratton engines. They rarely go bad after so few years. Will check will local lawnmower repair shop for used coil and compare resistance readings. Panari 591459 Ignition Coil Magneto Armature for 492341 490586 491312 495859 … Raogoodcx Replaces Briggs & Stratton Electronic Ignition Coil Magneto Armature Fits 495859 491312 490586 492341. Is this style unusual or discontinued. I’ve read some threads above and seems that new coils have a resistance of 7kOhms lead to body (excluding the cap). Additionally the total resistance (11kOhm) is basically the sum of the partial resistances of the coil and the cap (7 4). Primary coil resistance hook up 1 lead of the multimeter to the electrical tab and the other lead to the iron core making sure your meter is set to Ohms. Of course, after a few minutes when I then released the safety bar to stop the mower, although the engine slowed due to the braking effect on the flywheel, the engine didn’t stop… because i’d not reconnected the kill-switch wire… Doh! (compression test was good). Typically a weak spark can cause a mower to shut off when it gets hot and the resistance of the ignition module increases. I measured between the kill switch and the body and it says 0 ohms. With them off the motor, both coils give 1.6 ohms kill switch tab to coil body…close enough to a hard short to not matter. This procedure is assuming you have pulled break release / kill handle back to the run position. Thank you! I do not get a spark. COVID-19 UPDATE- We Are Still Open And Operating Following All Recommend Guidelines. Ignition coil secondary resistance = 5K to 10K Ohms" * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Today, I measured the secondary of one of my coils (did not remove the coil from the engine) and I measured 6.24K Ohms from tower to tower. Coil gap set correctly with B&S card. Now no spark with that coil!. If no shock, check kill switch which will, unfortunately, means removing top of engine cover. Armature ignition coil part number 298506 as fitted to 3.5HP Briggs and Stratton engine type 92908. Set the positive lead of the multi-meter in position where the spark plug would usually insert – ensure it has made good contact. I have strange problem, just like few other people above…it is 1998 engine, model 10c902, type 20138 E1. There is no capacitor unless you have a points ignition system. It is getting very little if any spark. FREE Shipping on orders over $25 shipped by Amazon. It is possible but very unlikely that the ignition coil is faulty. Look elsewhere for other problems. Thanks so much for your fast reply. Make sure readings are in the manufactures limits. What about the other? 3.4 out of 5 stars 14. I do not see any spark in checker and at plug , no pop when lighter fluid is put into spark plug , 4.85 k ohms reading on coil. -Find and disconnect kill switch wire, to rule that out… no change What worries me though is the fact that upon disconnecting the plug cap from the lead, noticed that the resistance from the lead to the magnetron body was only 7kOhm! 4.5 out of 5 stars (2) 2 product ratings - BRIGGS AND STRATTON IGNITION COIL … 24 $47.50 $47.50. Hi, the kill wire should be around haalf ohm when the killswitch is not grounded. Stratton small engine in the video which is fitted to the frame when switch... To harm you the contact page we can help you out with a cap... Still going to make my own tester when i get a chance the last answer.010! 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