milky cream colored stuff on spark plugs

[drillerdan87]

Hey guys please help me, I have a1977 115hp Johnson I just purchased it from a guy I put fresh fuel in it, I made sure my ratio was right started it at the house on the hose and it ran fine it pissis fine stays cool to the touch. So yesterday I take it out on a test run it runs beautiful it's hauling *** then I eez off the throttle so I can turn safely then she dies so I turn it back on it idled then I put it in drive and she dies. I get home and look over it and I notice milky stuff on three of the four spark plugs. What do I do and were do I start. Three of the four cylinders has 110 psi and one has 95 psi

 

[HighTrim]

Re: milky cream colored stuff on spark plugs

You either have water in your fuel (is it new?), or water intrusion into the combustion chamber. How is compression?

 

[Joe Reeves]

Re: milky cream colored stuff on spark plugs

In agreement with High Trim.

 

[F_R]

Re: milky cream colored stuff on spark plugs

+3. Water in cylinders. You must deal with it immediately. The internal parts look at it and think it has been submerged. Rust and destruction started when you shut it off, and continues.

 

[Lone Duck]

Re: milky cream colored stuff on spark plugs

YUP!! All of the above.

 

[drillerdan87]

Re: milky cream colored stuff on spark plugs

YUP!! All of the above.

hey guys yes the fuel was new I'm going to check the cylinder pressure today I will let you know as soon as I know

 

[F_R]

Re: milky cream colored stuff on spark plugs

Was the tank empty before pumping the new fuel in it? Anyhoo, it is unlikely that that much water from gas got into the cylinders before it quit running, but entirely possible. More likely is a problem in the exhaust cover between the cylinders' vee, letting cooling water squirt into the exhaust ports. Of course it could have blown head gaskets too. But in three of the four cylinders at the same time? Reading between the lines here, I'm betting that motor has been run hot, cooking all the head gaskets and exhaust gaskets. If I'm guessing right, when you get the exhaust covers off you will be able to see if it fried the pistons skirts also. You may have bought a junker. Stuff happens.