water in cylinder??

[71whaler]

1983 75HP Evinrude. I have an ignition problem with #1 cylinder (no spark, changed plugs, checked coils, power pack etc) but I also suspect water in #2. I swear I see drops on the plug but other people say I am crazy. #2 fires and the compression is good. <br /><br />120<br />115<br />130<br /><br />Will a cylinder still fire if some water is getting in? <br /><br />I am debating dropping it off at shop to get looked at but I am not sure I want to keep putting money into an old motor. I don't have the test equipment to further troubleshoot the ignition problem.

 

[Blueclaw]

Re: water in cylinder??

If your getting a lot of water the plug would look like it was steam cleaned. if you have a small leak it could still fire. Look for rust coloration on the electrode.<br /><br />did you try eliminating you stop circuit and see if you get spark to #1 cylinder?

 

[R.Johnson]

Re: water in cylinder??

The most common cause of water in the 3 cylinder engines' is a leak in the exhaust by-pass cover.

 

[71whaler]

Re: water in cylinder??

Originally posted by Blueclaw:<br /> If your getting a lot of water the plug would look like it was steam cleaned. if you have a small leak it could still fire. Look for rust coloration on the electrode.<br /><br />did you try eliminating you stop circuit and see if you get spark to #1 cylinder?

The plug looks fine, except I think I see a few clear drops of water. If I tap it out in my hand, it smells like gas so maybe I am wrong. <br /><br />As for the stop circuit, I did not test this since the motor starts fine. In my book, OMC service manual, it mentions the Stop Circuit Test and Key Switch Elimination Test as the same thing. I thought since the motor starts fine then the Key Switch could not be the problem. Could there be a problem with the Key switch that would still allow the engine to start but keep #1 from firing?

 

[Blueclaw]

Re: water in cylinder??

that's the first thing you do when you have spark problems. eliminate the stop (black w/yellow stripe) circuit and see what gives. You have to choke the motor to stop it with the stop circuit disconnected

 

[R.Johnson]

Re: water in cylinder??

The key switch would not effect one cylinder. You have an ignition problem to trace down. The coil, power pack, sensor, could cause this problem. To start, change coils around, and see if the problem will move to another cylinder.A leaky head, or exhaust cover gasket will let water into the cylinder.

 

[71whaler]

Re: water in cylinder??

Thanks for the replies. I really appreciate all the help I recieved on this site. <br /><br />I changed the coils around and the problem is still on #1. I also replaced the power pack and #1 still does not fire. When I changed them I also changed the pin placement in the connector to the power pack. That is the wire running from the #1 coil I moved from A to C when I moved that coil to the #3 Cylinder and vice versa. Should I left them as is?<br /><br />Unfortunately I do not have a CD Voltmeter as the manual suggests but I could make an adaptor as Blueclaw suggests for testing the rest of the ignition components. My other post on the ignition problem is <br /><br /> http://www.iboats.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=28;t=034216 <br /><br />As for the possible water leak, I thought I should first try and track down the ignition problem and then try the water leak, if there is one.