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Small Engines (Lawn Mowers, etc.)/NO VOLTAGE BOLENS WEED WACKER


QUESTION: Eric Hi Im not getting any spark on my Bolens BL100 trimmer.  I replaced the spark plug, checked wires to switch, etc.  Is there a way to test the wire module assembly. Are you famailar with this weed wacker, I need your help.  Thank you Kenny

ANSWER: You can check for resistance but the best way to test them is just to dis-connect any small wires, the wires from the shut-off switch, and then check for spark.

If you do not have any spark, with the switch wires dis-connected from the module, then the module is bad.  This is the recommended procedure by many manufacturers.


---------- FOLLOW-UP ----------

QUESTION: Eric Hi I removed the wires an Im not getting spatk from the plug,  How difficult is it to remove the wire module. Also is there a place where I can purchase this module and get a good deal on it. Thanks Ken

To access the module, you need to remove the shaft assembly and plastic engine housing case.

As far as an inexpensive module, the part number you need is an MTD 753-04336.  Just Google the part number and search for the best deal.

You can try to find a used one at local small engine shops in your area. The part was used on over 70 different machines so there is a good chance finding a used one if any of the local shops have a "bone yard".


Small Engines (Lawn Mowers, etc.)

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Eric A. Jones


Lawnmower Repair . Certified Master Service Technician from B&S. Have 23 years experience on B&S, Lawn Chief, Weed Eater, Echo, Peerless, Wheel Horse, Snapper, Atlas, MTD, McCulloch, Homelite and many other numerous brands. Specialize in electrical repair.


Born and raised in the midwest. Started tinkering with engines when I was about 14 on my Suzuki RM-80. I began lawn mower repair at a small hardware store. I knew absolutely nothing. I read lots of repair manuals and met an older fellow who taught me many lessons. I continued working on small engines through high school and paid my way through college working on mowers at the same hardware store. Decided to get away from the midwest and mower repair so I joined the Air Force. I repaired air traffic control electronic equipment and ended up in Hawaii where I got a part time job at Small Engine Clinic. I gained a lot of experience from the Small Engine Clinic and had a blast repairing small engines. I then took the Briggs and Stratton Master Service Technician test and earned my MST. I then traveled to Wisconsin where I attended the factory update training seminar and received formal training. Continued working on mowers part time as I completed 20 years of military. Retired from the military on a Friday and continued in the lawn and garden industry the next Monday.

MAS Aerospace Operations BA Mathematics AAS Electronic Communications AAS Electronic Technology

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