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Duke

  • Karma: +0/-0
ignition coil question
« on: May 22, 2011, 10:05:03 PM »
so.. after dropping in my mallory dual points dist. ( had to move the oil pump rod about 1/8 of an inch to get everything lines up to the first cylinder on the compression stroke.) i got the engine to run for about two minutes a few days ago.

so i stoped and went to pick up a timing light. now it wont start.

it will turn on for about as long as i hold the key in the start position, once it fires up and i release the key to the on position it dies.

its still getting fuel as the bowls are not empty after

obnoxious told me to look at the ignition coil and so i put a volt meter on it

heres what i did and what happened.

 put the volt meter to the ignition coil. reads nothing at the "on" position

had my brother turn the engine over and it jumps up to about 6 volts as its turning, then goes down to low fives when he releases it back to the on position. tried this a few more times and same thing everytime.

so im assuming the ignition coil is bad.

i looked at some of the coils on the summit and jegs websites, mallory makes some. but i would like some feed back, if i am going to replace it, what i should look for

1983 chevy 454 mallory dual points .. thanks

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1984 advantage jet boat 454 berkeley

Beaveretriever

  • Karma: +34/-0
Re: ignition coil question
« Reply #1 on: May 22, 2011, 10:24:56 PM »
i would check the 12v source power to the coil. If the motor will run when you have the key to the start position and then it shuts off when the key is returned to the on position, this to me sounds like a source problem.

The Beav
  • Boat #1: 1981 Eliminator Daytona 19' Jet
  • Boat #2: 2003 22' Placecraft Deck boat
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SS-201

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Re: ignition coil question
« Reply #2 on: May 23, 2011, 01:19:45 AM »
Sounds like you have the ign hot wire put on the wrong post on solonoid.
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SLCKREG

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Re: ignition coil question
« Reply #3 on: May 23, 2011, 08:40:26 AM »
Does it have a ballast?
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IRRebel

  • Karma: +16/-0
Re: ignition coil question
« Reply #4 on: May 23, 2011, 08:50:25 AM »
Ignition switch.... ;)

Ray
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"Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways totally worn out shouting 'Holy Shit what a ride!"---Crewcheif22 AKA Keith

ka0tyk

  • Karma: +30/-0
Re: ignition coil question
« Reply #5 on: May 23, 2011, 09:13:29 AM »
before you go removing or messing with anything run a jumper wire from the battery to the ignition and try it.
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Duke

  • Karma: +0/-0
Re: ignition coil question
« Reply #6 on: May 23, 2011, 09:24:52 AM »
i would check the 12v source power to the coil. If the motor will run when you have the key to the start position and then it shuts off when the key is returned to the on position, this to me sounds like a source problem.

The Beav

whats the source? as in the battery? the battery was at 12.7volts before i started this little test

i'll look into the wiring of the solonoid, i dont think its wrong but i'll definetly look into it.

btw anyone have a basic wiring diagram for a boat like this?

yes there is a ballast, im going to check that, how many ohms should it be reading?

i dont think the ignition is bad but i suppose i could look into it.

note* i had the wiring gone through a few years ago and everything was fixed. i had a loose wires and it was burning out my fuses, but it should have been taken care of.
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1984 advantage jet boat 454 berkeley

SLCKREG

  • Karma: +0/-0
Re: ignition coil question
« Reply #7 on: May 23, 2011, 11:58:11 AM »
I could be wrong....not sure on the ohms on the ballast....but I believe it is suposed to be 12 going in ...and about six going out. When I ripped mine off and went to a hei. I only had 1 volt coming off the back side of my ballast.
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obnoxious001

  • Karma: +4/-1
Re: ignition coil question
« Reply #8 on: May 23, 2011, 01:33:00 PM »
so.. after dropping in my mallory dual points dist. ( had to move the oil pump rod about 1/8 of an inch to get everything lines up to the first cylinder on the compression stroke.) i got the engine to run for about two minutes a few days ago.

so i stoped and went to pick up a timing light. now it wont start.

it will turn on for about as long as i hold the key in the start position, once it fires up and i release the key to the on position it dies.

its still getting fuel as the bowls are not empty after

obnoxious told me to look at the ignition coil and so i put a volt meter on it

heres what i did and what happened.

 put the volt meter to the ignition coil. reads nothing at the "on" position

had my brother turn the engine over and it jumps up to about 6 volts as its turning, then goes down to low fives when he releases it back to the on position. tried this a few more times and same thing everytime.

so im assuming the ignition coil is bad.

i looked at some of the coils on the summit and jegs websites, mallory makes some. but i would like some feed back, if i am going to replace it, what i should look for

1983 chevy 454 mallory dual points .. thanks

OK, your statement here is slightly different than all the PM's you have sent.  If the keyswitch is in the "on" position, and you have zero volts at the coil, it comes back to the three things I previously mentioned to you.  If you read all of the above posts, they all recommend the same things I told you in PM's. 

You may have a bad ignition switch

You may have a bad ballast resistor

You may have some other wiring problem.

I would not worry so much about how many ohms the ballast resistor is, but does it show continuity?   Put the meter on a low range resistance setting and see if you get some needle deflection.  As I had told you before, you will need to remove the wire from one side of the resistor to make that test.

Also, as I said previously, and is indicated above,, you can jumper 12 volts directly to the coil to see if it runs, but do it in a way that you can pull the wire to kill the engine.
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Duke

  • Karma: +0/-0
Re: ignition coil question
« Reply #9 on: May 23, 2011, 02:53:22 PM »
i just check the ballast resister, its getting 10.6 v on one side and 5.6 on the other side. i'll check the "Put the meter on a low range resistance setting and see if you get some needle deflection" right now, its a digital meter so i'll see if it reads anything.

this is all new to me so im just trying to keep up with everything. some things i have a hard time understanding but im just trying to figure this out, and everyone's been really helpfull especially obnoxious. thanks a lot i really appreciate it all!!
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1984 advantage jet boat 454 berkeley

Duke

  • Karma: +0/-0
Re: ignition coil question
« Reply #10 on: May 23, 2011, 03:07:21 PM »
i unhooked the ballast resistor on one side and put the meter down to the 200 ohms setting, and when i make the connection, it goes from about 1500 and quickly drops down to 40ohms then slowly makes its way just below 30. it doesnt want to stay at one certain resistence level.

i guess next is to try and skip the ignition switch. im going to look into it right now and see whats going on in there. thanks
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1984 advantage jet boat 454 berkeley

76NORDIC

  • Karma: +23/-0
Re: ignition coil question
« Reply #11 on: May 23, 2011, 04:56:04 PM »
Ignition switches are cheap enough, just get one and replace it anyway, just my .02 :beer:
  • Boat #1: 76 Nordic BBF 460 Jet
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The definition of insanity: Doing the same thing over and over again, and expecting different results.....Einstein

I refuse to call people an ass anymore. It insults hard working donkeys worldwide!

obnoxious001

  • Karma: +4/-1
Re: ignition coil question
« Reply #12 on: May 23, 2011, 04:56:20 PM »
i unhooked the ballast resistor on one side and put the meter down to the 200 ohms setting, and when i make the connection, it goes from about 1500 and quickly drops down to 40ohms then slowly makes its way just below 30. it doesnt want to stay at one certain resistence level.

i guess next is to try and skip the ignition switch. im going to look into it right now and see whats going on in there. thanks

Right,, the fact that it was getting voltage through the resistor probably eliminates that as being the problem, unless vibration of the engine running makes the broken resistor wire separate.  You can take the wire from one side of the resistor and attach it to the other side, thereby connecting the two wires and bypassing the resistor to test it out. 

Back to what you said above about the key being turned on and no voltage at the coil until the key is turned to the "start" position.  That's probably where the problem lies,, if you wanted to trace the wire from the coil to the ignition switch and make sure there are no splices or breaks, you can use the meter to check voltage at the terminal on the switch, and any other connections in between (terminal strip on a jet boat maybe?)
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Duke

  • Karma: +0/-0
Re: ignition coil question
« Reply #13 on: May 24, 2011, 12:09:32 PM »
there is a terminal switch..

just want to make sure im clear on tracing the ignition switch. (im not looking at the boat right now this is off the top of my head)

trace the positive from the coil to the terminal switch. and then the wire from the terminal switch that goes to the front of the boat to the ignition.

making sure theres no breaks in the line.

under the ignition switch theres three terminals. (i looked yesterday) but i think its a pos. ground, and ones labeled I, which im assuming is ignition?

so i'll put my volt meter to the ground and ignition, and then ground to the pos. to make sure im getting power right?

i'll be doing this after going to class so it wont be till later tonight, if i even get to it. thanks.

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1984 advantage jet boat 454 berkeley

IRRebel

  • Karma: +16/-0
Re: ignition coil question
« Reply #14 on: May 24, 2011, 12:28:11 PM »


$22.99 from CP PErformance. Seems to me I got one for around $15 bucks from Dry Dock Marine here in PHX, Tom or Jim can probably get one right quick and match the price.

Put the meter away............ :banghead:

Ray
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"Life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways totally worn out shouting 'Holy Shit what a ride!"---Crewcheif22 AKA Keith

 


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