Logo
FULL SITE MENU

15 HP Johnson no fire

A

armeddoc

New member
I'm testing my '92 Johnson outboard and was just wondering what kind of DC voltage should I be getting before or after the coil? I am an electrician, so I have a very good digital meter that I set to tell me the min/max voltage as i pulled the rope. The most I ever got was 1.267 VDC.

Also my engine is recirculating water but seems to be overheating as the coils were a little melted to the block. And it melted the rubber wire protector on the wires from the ignition system under the flywheel to the coils. Should i replace the water pump or just try to clean it?
 
Replace the impeller , they are cheap and only last so long.------Test the components ( ohms ) under the flywheel.
 
Yes replace the impeller. You should have 150-400 volts AC going to the coil and you need a DVA to measure it.
 
You have to remove the lower unit to replace the impeller.------------Might be a good idea to do a compression test if wires have melted on the motor !!
 
oh well don't think i'm gonna get one of those soon, Thanks for all the good info. Is there any other way to tell if i'm getting fire at the spark plug? I know on a car, the spark plug can be grounded and ignition can be turned over, to see... Same with a pull start outboard?
 
You can use the plugs laying on the block to check if there is any spark.------------------BUT FOR A PROPER TEST you establish a gap of 3/8" or more to really test if spark is good.---------You need to install the clip for ignition on the kill switch for testing.
 
Cool, thanks. So if there is no spark, any way to tell if it's the coil or the stuff under the flywheel?...other than the DVA? I had new coils on there, i replaced them when i was first figuring out why it wouldn't run....turned out to be the kill switch. So i unplugged it, and it worked good for a while. I still have the old coils, which are probably still good.
 
I'm probably going to do both, cause it circulates water almost the entire time the engine is running. But still seems to overheat.
 
Back
Top