Johnson 150 ignition

[Rosati]

I have a 1985 Johnson 150.<br />The engine runs and has the VRO disconnected. I have rebuilt the carbs and re-installed them. With the engine running on the hose, I installed my inductive timing light on each plug wire and have only two cylinders firing. Looking from the stern toward the bow, the top two left cylinders are the only ones firing. <br />This is why I believe the engine would not get on plane and seemed to bog down when trying since it was only running on two cylinders.<br />Can I remove the flywheel and sand the underside to make sure I am getting juice to the coils?<br />How do I test the coils?<br />How do I test the Alternator?<br />The engine is model #J150TLCOS

 

[rodbolt]

Re: Johnson 150 ignition

hello<br /> if only two were actually sparking on 2, I am not sure it would run on the flusher. about the only way to test the ign system is with a CD-77(or equivalent meter) and a service manual. not to be short but without a spark tester and a peak reading multimeter as well as a service manual there is not much advice I can give.<br /> sorry

 

[scampbell]

Re: Johnson 150 ignition

I have an '84 Evinrude 150. One day when returning from a day of fishing, the engine died and would not hit a lick. To make a long story short, after several weeks of trial and error, I pulled the flywheel and the stators were corroded. I cleaned everything with emory cloth, and solved the problem. However, I did learn one extremely valuable lesson regarding these Eveinrude V-6's. The first time I got down on the motor, it quit again. If it ever did fire, it would backfire. It turns out that after you replace the flywheel, you must torque it down like crazy. The flywheel had broken the key and spun ever so slightly. The guy that I took it to who knows these engines told me that there is no way to get the proper torque by hand. He uses an impact wrench with something like 400 lbs. of torque to resaet the flywheel.<br /><br />Good luck.

 

[R.Johnson]

Re: Johnson 150 ignition

That impact wrench would be a good way to split the hub on a very exspensive flywheel. The proper way is a flywheel wrench, such as made by Snap-On, and a Ft.-Lb. torque wrench.