merecruiser ignition ?

[daviscfad]

Ok I have a 454 mercruiser thunderbolt IV ignition.. I went through the manual on the sticky and checked all the wiring diagrams and everywhere i was supposed to have 12 volts i had it... I checked distributor, ignition coil, solenoid, circuit breaker, starter, and ignition switch.. Is there anything i am missing?? The reason i post this question is b/c when i turn the key nothing happens... I can turn the starter over touching the two post but nothing at the switch.. any ideas of what i might be missing... and on the 454 left hand rotation i know the firing order is 1-8-4-3-6-5-7-2...is the number 1 piston if you are facing the motor "looking at the pulleys" on the left or the right

 

[Don S]

Re: merecruiser ignition ?

Here is the picture from any V8 Merc manual. Not sure which manual you have, but here is the picture from #16

 

[chiefalen]

Re: merecruiser ignition ?

Don posted this trouble shooting guide.


http://forums.iboats.com/showthread.php?t=167035

Ok few things you can try real fast, jiggle the throttle handle make sure it's in neutral, check the kill switch or just pull the wires off it and don't let them touch.

 

[daviscfad]

Re: merecruiser ignition ?

Don
from your picture it looks like if you are standing in front of the motor number one plug is on the right.. Am i correct

chiefalen
I will check out the trouble shooting guide... My ignition switch is not on my shifter it is on the dash... shifter is off to the side so i dont think it should matter... as far as kill switch i am not sure

 

[chiefalen]

Re: merecruiser ignition ?

It matters there is a neutral safety switch in the throttle if it is not in neutral you get no spark no nothing same with the kill switch.

Just jiggle it to make sure it's fully in neutral.

 

[daviscfad]

Re: merecruiser ignition ?

lol well i do not have my throttle hooked up. so maybe thats the problem?

 

[chiefalen]

Re: merecruiser ignition ?

So where are the wires that go to the throttle?

 

[Don S]

Re: merecruiser ignition ?

I can turn the starter over touching the two post but nothing at the switch.. any ideas of what i might be missing...

Somehow missed that sentence in you original post.

Why are you checking spark and ignition systems when you have a cranking problem?
Go to the link Chiefalen posted http://forums.iboats.com/showthread.php?t=167035 and follow it. If you have the wiring harness from the helm connected, it doesn't matter if you have the cables hooked up or not. Go through the troublshooting process. It's necessary.

 

[daviscfad]

Re: merecruiser ignition ?

So where are the wires that go to the throttle?

none of them are hooked up... this is a motor i am doing for the first time so i do not have all that hooked up... I had the throttle temporarily hooked up and only had trim and tilt wires hooked up... I do have two yellow and red wires that are coming from the shifter and two coming from the boat i assume those are the wires you are talking about.. should i connect them and manually shift the cables in neutral

Why are you checking spark and ignition systems when you have a cranking problem?

b/c i just hooked all that up today also.. I figured i would add that in that it had been checked

Don
from your picture it looks like if you are standing in front of the motor number one plug is on the right.. Am i correct

Somehow you missed that also

 

[Don S]

Re: merecruiser ignition ?

Look at my picture again.

Think about the word FRONT at the top of the picture.

 

[daviscfad]

Re: merecruiser ignition ?

thanks Don i dont know what this forum would do with out you man.. You are just the best guy on here

 

[chiefalen]

Re: merecruiser ignition ?

I'm backing out of this thread you don't need me. You already said it no one is better to assist you than Don.

I got my hands full with a youngin with a stringer problem i'm trying to assist.

Good luck !

 

[daviscfad]

Re: merecruiser ignition ?

Please Understand that i was being sarcastic when i said that about Don

 

[Don S]

Re: merecruiser ignition ?

No problem, I won't bother you anymore.

 

[JustJason]

Re: merecruiser ignition ?

It matters there is a neutral safety switch in the throttle if it is not in neutral you get no spark no nothing same with the kill switch.

Whaa?????
The neutral safety switch... or NSS.... goes inline with the start wire off of the keyswitch... and that's it.
The kill switch... or Emergency stop switch... or ESS grounds out your coil.

 

[chiefalen]

Re: merecruiser ignition ?

I wasn't going to post here again, but now i must.

1- I didn't know the wires were off everything.

2- I was trying to cover Don s back. I saw he missed something and just wanted to post the troubleshooting guide and a quick fix maybe.

3- Read where he says he got nothing when he hit the key, and there was nothing. ( READ THE FIRST POST ) He states the reason for his post.

4- Would that suggest at that point and time, that maybe, the kill switch was out, or, the throttle was not in neutral, and if jiggled would give him power.
If we were given the info that everything was in disarray and no wires hooked anywhere then we would have given more precise info to help.

I ask here in the open forum was i so wrong in what i posted?

Davis He was trying to help you. No reason for that last post, and your were wrong. Plus he doesn't need me to defend him, he can handle himself quite nicely.

 

[chiefalen]

Re: merecruiser ignition ?

Problem resolved 50 pm's latter turned out to be the slav. I couldn't turn away someone who needs help.

Thinking about what Bond o and Don has posted at the bottom, no pm's this is what the forums are for.