new question-new problem

[woodnknots]

If you read my post "I think I screwed up", you can see that I narrowed down my likely faulty component to the rear CD unit. I know that there are 2 outputs for that, and only one is used (I have a three cylinder), and I was told that I could try to see if only one half of the CD unit was bad.

Here's my question. Can I just plug in the offending plug to the second output, or do I have to ensure that the CD unit has the wiring hooked up for the second output? I already tried just plugging the non sparking coil to that second, unused plug, with no success. That got me to thinking, though, that I should ensure that the proper wiring would be hooked up to enable power to get to that output.

Am I on the right track? Has anyone had to do this before? I found a new/used one for about $90, but if I can get mine to work, I'd obviously like to do that.

thanks again, you guys have helped this novice boat mechanic more than you know.
Dave

 

[roscoe]

Re: new question

Re: new question

You need to hook up the cd to the proper leads from the trigger, or it won't get a signal from the trigger, telling the cd to fire voltage to the coil.

 

[woodnknots]

Re: new question

Re: new question

You need to hook up the cd to the proper leads from the trigger, or it won't get a signal from the trigger, telling the cd to fire voltage to the coil.

that's what I was thinking. I'll try it tonight. I wasn't able to do it last night due to lots and lots of rain. Expect an update tomorrow!

 

[woodnknots]

Re: new question

Re: new question

Okay, I got a new CD, and got my spark back to cyl #3. Now my engine is running exactly as it did when I thought I had bad gas!!
It runs for anywhere from not at all to about 15 seconds, with intermittent sputtering, till it just quits.

#3 cyl (top one) has only black power type substance on the plug (completely dry).

#1 and 2 (bottom and middle, respectively) are wet.

So I was thinking maybe I had weak spark on 1 and 2. I first swapped CD boxes, hoping that the front box (original with motor, as far as I know) was weak and the new box I got from the salvage would fix that problem.
No joy on that.

So I figured a good way to figure out if it was a weak coil would be to swap 3 and 2 triggers and plug cables to see of 3 would be wet while 2 was dry. No luck, and no appreciable difference in how the motor ran.

Should ANY of my plugs be wet? My dad says no. I seem to remember when I first got the boat (about 2 months ago) that all my plugs were wet to some extent when I pulled them.

If my plugs should all be dry, then what else might cause my spark to be weak? Have I done the right things so far? Does anyone have any more thoughts or theories?

 

[Docdoc]

Re: new question-new problem

Remember that a 2 cycle engine is a little different than 4 cycle. The lubrication comes from oil in the gas. If your plugs are completely dry, then that means there is either no oil in the fuel (really bad situation) or there is no fuel/oil mix getting to the plug. You should have a little oily residue on all plugs. I think I'd pull the carb off and take a look at the reed valves in the intake manifold. You may have an obstruction to number 3, or the reeds for it may be damaged/stuck.