Water out of Sparkplug??

[shooter26]

I have a 1974 25hp Johnson 25RL74M with water leaking out around top sparkplug. What should I look at first and Thanks again for all your help.

 

[revertmastec]

Re: Water out of Sparkplug??

try a compression check. might be a crack in your head gasket.

 

[Down South]

Re: Water out of Sparkplug??

Is the motor firing on that cylinder? Pull the plug and see if you have water in the cylinder. If it is dry it sounds like your water manifold is cracked.<br /><br />Good luck

 

[Duckboater]

Re: Water out of Sparkplug??

Not sure about your particular engine 'cause I have a Merc, but it could just be the gasket for the water jacket that surrounds the cylinders and head. They tend to dry up if they haven't been used for a while and water starts to seep out around the plugs.

 

[shooter26]

Re: Water out of Sparkplug??

Thanks for the replys revertmastec,Down South and Duckboater. I can't look at it until the weekend, I'll keep you posted on what I find. Thanks again.

 

[mbramble]

Re: Water out of Sparkplug??

I just started up an old 5.5 HP Evinrude Fisherman this afternoon that had not been run in awhile. Had water pouring out around the head bolts. Shut it down, tightened down the head bolts (all were 'loose'), started it back up and no more water.

 

[shooter26]

Re: Water out of Sparkplug??

How would I go about doing a compression check I never had to do one before.

 

[revertmastec]

Re: Water out of Sparkplug??

Shooter,<br /><br /> If you go to a auto store you can pick up a gauge to do a compression check. Not to costly. Remove your sparkplugs and screw in the gauge. Crank the motor and you will get a reading. I believe all cylinders should be within 15% of one another. If i am wrong someone will correct me. If you find that one is not holding any pressure this is where your problem is. Good Luck and safe boating

 

[shooter26]

Re: Water out of Sparkplug??

Thanks revertmastec, So I should take both plugs out, test each cylinder (with both plugs out?). Crank the motor?? 1 pull of the cord or an amount of time on the starter?<br />Thanks Again,<br />Jay

 

[rolmops]

Re: Water out of Sparkplug??

Hello. <br />Take both plugs out. You don't want to accidently start the engine.The engine should turn over about 5 times to get a good reading.Ideally you let it run for a few minutes so it gets warm and then do your test.The difference between the cylinders should not be more than 10%<br />Good luck.

 

[shooter26]

Re: Water out of Sparkplug??

Thanks all, I'll post Monday what I find this weekend. <br />Your help is Greatly Appreciated.

 

[shooter26]

Re: Water out of Sparkplug??

Hello again, well this is what I found...I pulled the cylinder head gasket off and there is a small rip in it about the size of a pencil eraser, and it looks very clean inside the top cylinder. At the tear it looks "dirty" like exhaust is getting out in to the cooling water. Could the water enter in to the cylinder there and cause the problem of bogging down as I posted. From what I can see the cylinder walls look and feel smooth and rings look good.<br />Thanks for your help, I also did a cold compression check and found 75 in each cylinder.<br />Jay

 

[shooter26]

Re: Water out of Sparkplug??