Bottom cylinder not firing

[steph]

Help, a newbie. I have an 1984 Johnson 60hp 2 cylinder model# J60TLCRE and the bottom cylinder is not firing. I change the spark plug but no change. when the engine is running and I disconnect the top cylinder the engine stops when I disconnect the bottom one the engine keeps running like nothing happened. I would really appreciate some help as my daughter and I want to try it this weekend. New to boating but I have some basic knowledge just not the terms.

 

[tashasdaddy]

Re: Bottom cylinder not firing

paying attention to where the wires go. take a picture or make a diagram. completely swap the 2 coils. if the problem follows the coil replace it. that simple.

 

[steph]

Re: Bottom cylinder not firing

Thanks tashasdaddy I'll try that tonight. Also, how can I check that the spark plus is actually firing?

 

[steph]

Re: Bottom cylinder not firing

After searching on the forum I saw a lot of comments about compression. So, I decided to by a tester. The top cylinder (the 1 out of 2 working OK) has a compression of 140. THe bottom (the one, the one not firing) has a compression of 30. I guess thats the problem. Haven't check the coils yet. What is my next step. Please help, my daughter and I really need to go boating badly. Seperation therapy. Thanks again everyone.

 

[tashasdaddy]

Re: Bottom cylinder not firing

no need to check the coils. get a wrench and pull the head and see if it's a blown gasket or worse. pictures will help in the diagnosis. use the blue reply, type what you want, then scroll down to manage attachments,clik you can upload from computer or hosting site.

 

[steph]

Re: Bottom cylinder not firing

I guess the head is where the spark plugs are? What's blue reply?

 

[BoatBuoy]

Re: Bottom cylinder not firing

It's the button I just clicked on to post this reply. Now, if I wanted to post a picture, I could scroll down to "manage attachments".

 

[steph]

Re: Bottom cylinder not firing

I guess the head is where are the spark plugs?