90 hp 4 cyl. fires on 3 cyl.

[Janelle]

I have a 1998 johnson 90 hp 4 cyl. it is only firing on 3 cyl. the coil is good, I changed it with another, the power pack is brand new, i replaced it. Still no spark in 1 cyl. any suggestions, I would really appriciate it.<br /><br /><br /> Janelle

 

[12Footer]

Re: 90 hp 4 cyl. fires on 3 cyl.

If you have a wheel puller, pull the flywheel,and see if all the magnets are secured good.<br />I've seen them break loose, and in one case, it destroyed the trigger. But it usually will drop a cylinder (or two or 3 )<br />You will likely need the book and an ohmeter<br /> to check the trigger out.