Re: KF 5 lower crankshaft seal

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mercuryman


Replies: 467
Topics: 167
#70143

The large tube is part of the base of block. The top bearing carrier must be removed and the crankshaft pressed out the top with the center main bearing (reed valves). Once the crank is out you can drive out the seal out . Its hard to work down in the tube to install the seal, so that is why you remove the tube ( I am not talking about the water tube) I think Mercury had a tool to install the seal. I used heat around the reed valve cage and was able to just tap on crank and it came out. Everybody should do this once. Also you must remove cylinder block and disconnect the rods.