water leaking out sparkplug 1987 35 mercury

[sambrigman]

Somehow water is getting into cylinder, I pulled the plate and gasket looks new. Is there any other way water could get into cylinder? I do not know how water comes out with the plug down tight. And the motor runs perfectly!! Any suggestions greatly appreciated. Thanks guys

 

[flyingscott]

You are in the wrong forum. Is the water jacket gasket leaking they like to leak around the plugs holes.

 

[GA_Boater]

Now in the Merc forum.

Which cylinder? If it's the bottom, a failing lower crankshaft seal can cause this.

 

[sambrigman]

Its the top cylinder, and it is leaking alot

 

[racerone]

Did you replace the gasket ?----Was the correct gasket used ?-------I am nearly certain it is a common failure of the cover gasket !

 

[sambrigman]

I have ordered a new gasket, but it has a new gasket on it, someone has already tried to fix it.

 

[flyingscott]

Try either resurfacing it or double up the gasket around the spark plug holes.

 

[GA_Boater]

Is water actually in the cylinder or is water leaking around the spark plug?

Leaking around the plug is either the gasket or cover plate or both.

 

[sambrigman]

I do knot know if is leaking into the cylinder or not. The motor is running smooth.

 

[GA_Boater]

The opening to the thread said water is getting in the cylinders. Let's try again.

Is water leaking around the plug when running?

 

[sambrigman]

yes, water is leaking around the plug when running

 

[racerone]

What is the serial # of your motor ?---What is the part # of the gasket that was recieved / ordered for you ?--To me this sounds like an easy fix.

 

[sambrigman]

1987 35hp mercury sierra part #18-2805 27-85490-2 md this is the gasket I have ordered If this does not fix, I have a backup motor I can take the plate from. I just assumed that this motor was built like an evinrude, now i see that the water could come out around the plug, not by it. Thanks so much for your help