all this for a crankshaft seal !

[JJB]

Hey guys I finaly got this 2000 175 Johnson torn down for a crankshaft seal and find myself with more questions about it then just the seal . Well it had a leak in the lower crankshaft seal and looks like someone that rebuilt it never put the seal in right and hack one side of it . I wanted to know if you can remove the crankshaft without removing the pistons all the way since I have good compression I did not want to take them out . I wanted to Just undue the connecting rods and slide the pistons toward the cyl head but the manual said dont let the rods come in contact with the pistons sides . Would I be better just taking the pistons out ? I also notice that one side of my intake is black and the other is clean what would do this ? you can see in the picture that a few of the rods are black too . I also found a melted stator , looks like the power coils have started to loose there insulation out the front It will need to be replaced for sure. Thanks for the input on this one ! http://www.shareaproject.com/pages/projectThumbs,p,455,00.html

 

[Dhadley]

Re: all this for a crankshaft seal !

Yep, the crank will come right out. Just don't mix up the rod caps - you probably already knew that.

 

[JJB]

Re: all this for a crankshaft seal !

Thanks again Dhadley, Did you check out the picture link ?Do you have any idea why the one side intake is so black and so are a few of the rods ?

 

[Dhadley]

Re: all this for a crankshaft seal !

The black looks like its wet & black. Or is it dry (sooty)? What spark plugs are you running? Was it running right, especially at idle?

 

[JJB]

Re: all this for a crankshaft seal !

Thanks for the reply ! After getting into more I put a scrached # in top the rod caps it's looks wet and black and hard like paint and the bottom crank 1/2 is cover in the same stuff but not the top block part just rod caps on top . It idle good and I am using ql78yc plugs never over heated since I owned the motor and it did 47 mph on a 20' boat and always starts on the second turn of the key . I was wondering about the cyl crankseal bores they have rough spots on a few of them but only in the bottom 1/2 of crankcase cover, take a look at the bottom 1/2 of the crankcase cover seal bores picture . What do you think ? should I polish out the rough spots in the crankcase seal bores or will they leak ? I check all the crank seal rings and are to spec like new. and the main bearings dont show any discolor or scraches . The lower bearing seems to have a little play in it up and down and side to side , I was going to replace it to be safe . The pistons sides are very clean also and do look like there new . I dont know if this black was there before they rebuilt it and they just put pistons in it and left it like this . This is a strange one for sure