I am having starter issues after my engine rebuild. It requires 2 to 4 start tries / cycles to get the starter (pinion gear) to engage the ring gear. Before it engages, you get grinding / spinning. When it does engage, starts right away. Please note that getting the machine going after the rebuild took some long cycles of running the starter for 20 to 30 secs at a time. Did this harm the starter? Is it possible that new piant on starter / bell housing is causing a low voltage condition but I don't understand how it would ever start? Have also used a second car batt. w/ jumper cables for a boost and made no difference. Is the starter gear / clutch / solenoid not able to engage the ring gear as well now with the rebuild at full compression it does not move / turn as easy? Am I now looking at a weak starter in need of a rebuild? Options to get a rebuild kit or starter? Thanks, Fred