Took my lower unit off to work on and my driveshaft splines that go into powerhead are worn. Not bad but worn. What are the options to fix this? <br /><br /><br />I am currently looking for a used shaft and the crankshaft does not look bad but will check with the new shaft. <br /><br />Is this the only option or is there a way to replace splines in the crankshaft without disasembling the entire powerhead?