johnson 150 wet ignition

[pioneer11]

Johnson 150 95.

My problem is the cowl seal wasn't on correct and when I was running my boat on the weekend it ran great until we slowed down and the water came pouring over the back of the engine.

It started misfiring and would not produce any power. I pulled the cowl wiped off the spark plugs, when I pulled the wires drops of water came out.

That only worked for a couple times then it would not get over 1000 rpm.

My question is, is it just wires or did something else get wet? I pulled the coils and the bottoms of them all have cracks in the rubbers.

Is the power pack a sealed unit? I am just wondering maybe that got wet also?

I pulled wires while engine was running and it made no difference so I don't think they were getting a good spark. it was a small weak spark.

 

[Chris1956]

Re: johnson 150 wet ignition

Powerpack should be sealed. If salt water got on motor, hose it off. Replace any cracked coils and boots. Then troubleshoot spark quality.

 

[pioneer11]

Re: johnson 150 wet ignition

it's only been in fresh water. I pulled the cover off the coils and it was dry so I think only the plug wires got wet and then were ruined by pulling them off a bunch of times to dry them off. I'm sure they were old anyway if they failed from removing a few times.

The water seemed to be in the plug connector it's self and on the top of the plug so i'm thinkin they are bad.