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FJR Motorcycle Forums
Technical & Mechanical Problems
What are the symptoms of a shot starter?
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<blockquote data-quote="Constant Mesh" data-source="post: 1302143" data-attributes="member: 615"><p>Mine did the same thing. Each time after I replaced the battery the problem disappeared.</p><p></p><p>I'd measure the battery terminal voltage before the first start of the day and it always was 12.8 or higher. Yet the battery would fail spectacularly when trying to make a hot restart after refueling.</p><p></p><p>The internal resistance of the battery obviously increased over time and the voltage drop became excessive during starting.</p><p></p><p>Anytime the starter motor is accelerating up to its normal operating speed the current is elevated above normal running current.</p><p></p><p>During a hot start my starter motor struggled to accelerate up to speed so the current was really high. A good low internal resistance battery can accelerate the starter motor properly. A bad battery struggles.</p><p></p><p>Apparently a hot start after a brief refueling stop is the most difficult starting situation for this engine. My bad batteries were usually adequate otherwise except for the hot starts.</p></blockquote><p></p>
[QUOTE="Constant Mesh, post: 1302143, member: 615"] Mine did the same thing. Each time after I replaced the battery the problem disappeared. I'd measure the battery terminal voltage before the first start of the day and it always was 12.8 or higher. Yet the battery would fail spectacularly when trying to make a hot restart after refueling. The internal resistance of the battery obviously increased over time and the voltage drop became excessive during starting. Anytime the starter motor is accelerating up to its normal operating speed the current is elevated above normal running current. During a hot start my starter motor struggled to accelerate up to speed so the current was really high. A good low internal resistance battery can accelerate the starter motor properly. A bad battery struggles. Apparently a hot start after a brief refueling stop is the most difficult starting situation for this engine. My bad batteries were usually adequate otherwise except for the hot starts. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
What are the symptoms of a shot starter?
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