1978 johnson no spark on cylonder #1

[winsworld]

I have a 1978 75hp johnson.It was running great all day,i stoped for a few moments and when i gave it some gas it had no power.I cheched for spark on all three cylinders and found that #1 had no spark.I replaced the ignition coil and still no spark.I swiched wires on #1 and #2 and got spark on #1 but not on #2.I pulled the fly wheel and looked at the sencers and all wires are tight.Any idess

 

[Bradg]

Re: 1978 johnson no spark on cylonder #1

I have a 82 70hp Johnson had no spark on top cyl.<br /><br />Problem was the power pack.

 

[winsworld]

Re: 1978 johnson no spark on cylonder #1

Originally posted by bradg:<br /> I have a 82 70hp Johnson had no spark on top cyl.<br /><br />Problem was the power pack.

thanks<br />how much and where did you find the power pack

 

[Bradg]

Re: 1978 johnson no spark on cylonder #1

Purchased at local boating store in saskatoon sk,<br />canada for 165.00. More than likely be cheaper in <br />U.S. Make sure you check and clean all the connections at the power pack as I had no spark at all until I cleaned and tightened the connections.