Mr. Pinball Tip:

A common cause of flipper solenoid burn-out is the mushrooming of the solenoid plunger against the coil stop causing an excess amount of friction that fails to allow a full stroke. This eventually will keep the high current winding active because the end of stroke switch won't be fully exercised. As noted in another tip, if the plunger is mushroomed or has a flat end, it is necessary to bevel the plunger using a file or grinder. But, remember, if one plunger has had enough play to mushroom then the chances are that the rest of the high-powered solenoids are also in need of beveling to prevent solenoid burn-out.

Pete Cliotis

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