1989 Johnson 25hp TJ25ELCEB No Fire

[bmscarb7596]

I am at my wits end. I'm hoping someone can give me a little insight. I was given this boat and motor 4 years ago and the original problem was the power pack! I bought the CDI Ring to set the gap and have done most of my own work. However a few weeks ago it started hesitating at full throttle and occasionally would just lose power then kick back up. A week ago we were heading down the lake and it just stopped running. Checked both coil packs and etc. When I pulled the flywheel I found that the Charge Coil had heated up and the resin pack had ran out of it. So I ordered a new charge coil and replaced it. I at this point have put on a backup power pack that I had on the shelf and the Charge Coil. I havnt messed with the stator or rectifier. The battery is good and is turning over fine. I am missing something and was hoping to get some insight on what direction I need to turn. I have a High School Bass club tourney this coming Saturday for one of my daughters. Was hoping to have the motor working by then or its gonna be a long tournament trolling.

 

[flyingscott]

What is the compression? Does spark jump a 7/16" air gap?

 

[bmscarb7596]

Hey thanks for responding. I checked the compression top cylinder is 115 and the bottom is 113. I have no idea on spark, thats my problem. I have zero spark. Running down the lake just fine and then boom done. I did check the stator by checking ac voltage on all yellow wires and it's not getting anymore then 3.2 volts. Stator maybe the problem??

 

[flyingscott]

Yellow wires are alternator wires Battery charging only. Where did you get the new power pak? The UFI ignitions can be problematic.

 

[bmscarb7596]

I bought a OEM Johnson UFI #584486M 4 years ago from Marine Engine. I bought 2 of them and kept one on the shelf for a rainy day.

 

[bmscarb7596]

I bought a OEM Johnson UFI #584486M 4 years ago from Marine Engine. I bought 2 of them and kept one on the shelf for a rainy day.

0584489 - Power Pack CD2USL6 This is what they show as a replacement now.​

 

[bmscarb7596]

So what I'm guessing is that having no fire at the plugs would not have anything to do with the stator , charge coil or rectifier?

 

[flyingscott]

Charging system has nothing to do with spark. Go to CDI electronics they have a testing guide for them. I wont even put the UFI ignition back in. I always do the conversion to get the cdi out from under the flywheel. Have you checked the lanyard switch? The ignition switch if you have one?

 

[bmscarb7596]

Actually installed a new lanyard switch 3 weeks ago when the lanyard got pulled and the disc inside the switch disintegrated. So I had to install a new switch. After I installed the new switch everything seemed to work fine for a few outings out.