Help me out guys. I am working on a B&S 17hp twin on a hydro walkbehind. Clutch will not engage blades. Checked all connections Clutch is getting power and solid ground. Hooked a charger to clutch and it does engage. Checked engine voltage and found only 7-8 volts at idle and maybe 10 at open throttle. Testlight however gets a lot brighter then when normal 12 volts is flowing when checking positive at open throttle. Tried replacing clutch with no change. I am stumped. Head is not real clear right now due to flu. Could use some brain cells from others to help me out.