Re: NO SPARK
Electricity is produced by magnets in the flywheel rotating around stator coils under the flywheel. There is a trigger coil under the flywheel that sends electrical pulses to the switchbox which is located on the side of the block. The switchbox takes the electricity from the stator and sends it to each coil based on the pulses from the trigger. The coils boost the voltage to fire the sparkplugs.<br /><br />You need something called a DVA multimetermeter to test the switchbox. Only place you can get one that I know is a Merc dealer and few stock them for sale. You can test the stator, trigger, and coils with a conventional multimeter. Manuals are available in a wide variety of places, possibly including your public library.<br /><br />For most other brands, it's a matter of elimination. If the stator, trigger, and coils check out okay, then it can be assumed that the switchbox is bad. The same logic would apply to yours.<br /><br />One often overlooked simple solution is the lanyard kill switch on the remote control (if yours has one) or mounted to the motor itself.<br /><br />One quirk with those motors...if you get a DVA multimeter, you might have to switch the red and black leads to get a reading. Many of these are polarity sensitive and need to have the polarity reversed on the tester. Just certain 18/20/25s. Doesn't apply to the rest.
