Water in Lower Cylinder of 1979 3-cyl Merc 700

[scott hamilton]

Motor is 1979 70 hrs Merc O/B SN 4716507<br /><br />Lower plug is getting steam cleaned. I have confirmed compression, spark and fuel are good. Motor runs great even on only two cyl. much to my suprise. I have already replaced exhaust cover/baffle gaskets. motor doesnt have a head gasket only a water jacket on the top of the cylinders. can anyone give me suggestions as to where i may go next to find the source of this water?<br /><br />my guess, unfortunately, is base gasket.<br /><br />your opinions are much appreciated!!!<br /><br />any help here??? THANKS!

 

[clanton]

Re: Water in Lower Cylinder of 1979 3-cyl Merc 700

May be lower crankshaft seal.

 

[scott hamilton]

Re: Water in Lower Cylinder of 1979 3-cyl Merc 700

Thanks....could it also be the base gasket? <br /><br />both base gasket and lower crank seal are one year old. we didnt put gasket sealer on base gasket when we replaced it.