2001 Mercury 200 EFI Replacing Crankshaft

[nymatt]

Boat wouldn't get into gear and temp alarm going off. Mechanic says crankshaft / spline needs to be replaced. Should consider rebuilding power head while doing the job. Sound right? I think it has low hours (getting the hours tonight) and compression is strong. Should I just replace crankshaft and leave power head alone and how much should that cost? Any feedback would be appreciated. Thanks.

[mt0264]

you wont know till you remove the lower unit and look at the splines on the shaft, to replace just the shaft if that is all shouldnt be that bad . I would not replace power head if it is running good and compression is good
good luck

[outasite]

How does your mechanic know the splines are bad is it making noise?Maybe the drive shaft is broken!At any rate the lower needs to be pulled to take a look at what you have.Then you can take a good shaft and push it up into the crank and see how much slop there is,and then decide the best way to repair.