John2189 453 #1 Posted March 23, 2021 Hi does the tab you ground to stop the engine make electric when the engine runs? My hrc7013 mower has an hour meter that does work. The engine does not have charging coils under the flywheel. Where does it get its power? Share this post Link to post Share on other sites
WHX?? 48,815 #2 Posted March 23, 2021 It's got a magneto that provides the spark. the tab grounds out that magneto killing the engine. 1 Share this post Link to post Share on other sites
John2189 453 #3 Posted March 23, 2021 18 minutes ago, WHX24 said: It's got a magneto that provides the spark. the tab grounds out that magneto killing the engine. Thanks I know that. It has an hour gauge that works. It has no electrical system. Where does the hour gauge get it’s power? Share this post Link to post Share on other sites
WHX?? 48,815 #4 Posted March 23, 2021 It may have a a button battery or run off the inductance created by the plug wire. If it displays while the engine is stopped it has a button battery. 1 Share this post Link to post Share on other sites
oldlineman 1,481 #5 Posted March 23, 2021 It would have to pick operating power from running engine so that it records running time. Share this post Link to post Share on other sites
John2189 453 #6 Posted March 23, 2021 2 hours ago, WHX24 said: It may have a a button battery or run off the inductance created by the plug wire. If it displays while the engine is stopped it has a button battery. This is 20 years old, I’m sure that a button battery would be dead by now. Plus it is the type of gauge that the number turn. Share this post Link to post Share on other sites
John2189 453 #7 Posted March 23, 2021 1 hour ago, oldlineman said: It would have to pick operating power from running engine so that it records running time. Ok where does it get the power from? Only wire that goes to the dashboard is the kill wire from the magneto Share this post Link to post Share on other sites
