need 470 wiring / coil help

[KCKracker]

i am in desperate need of a wiring diagram WITH one wire alternator and not a voltage regulator (it does get removed right?)

also, my engine harness gets hot when the key is on, i found the coil has +12 on both posts, i thought one side was negative? even if i disconnect all wires from it except the one from the ignition, both still have +12 volts with nothing going to the - side of the coil

 

[Lyle29464]

Re: need 470 wiring / coil help

Most likely the wire goes to your solenoid under the red battery cable. You have a resistor wire in the bundle that goes to the coil. It will be warm when your points are closed or the engine has been running a while. You will get 12 volts on both sides of the coil when points are open.

 

[KCKracker]

Re: need 470 wiring / coil help

i have electronic ign. no points

im just frustrated because i have begged for this diagram for weeks and no reply

 

[Bt Doctur]

Re: need 470 wiring / coil help

Not knowing what your harness looks like , but remove the 2 yellow wires going to the reg and tape then off. Should be a red or orange that has battery power on it, connect the single wire output there and tape off the remaining wires
If you do a search of the posts from DonS, you will find manual 8 for your engine.

 

[KCKracker]

Re: need 470 wiring / coil help

thanks. i dont get why my harness is getting hot and has 12v to both coil posts

 

[dubs283]

Re: need 470 wiring / coil help

thanks. i dont get why my harness is getting hot and has 12v to both coil posts

heat is caused by resitance due to corrsion, too small a wire, or too much current for the component/conductor

did you install the elecronic ignition system?? a lot of electronic igntions use an internally resisted coil so 12 volts at the coil primarys is normal

 

[KCKracker]

Re: need 470 wiring / coil help

for the 3rd time in the thread yes i have elec. ign

 

[dubs283]

Re: need 470 wiring / coil help

for the 3rd time in the thread yes i have elec. ign

i know you have electronic ignition

i asked if YOU installed it, and if so did YOU follow the instructions that came with it??

 

[KCKracker]

Re: need 470 wiring / coil help

no it was installed already in the motor in putting in.

 

[Don S]

Re: need 470 wiring / coil help

i am in desperate need of a wiring diagram WITH one wire alternator and not a voltage regulator (it does get removed right?)

Here's the main problem, the 470's did not come with alternators, or electronic igintion. So, the chance of finding a wiring diagram like your engine is setup is zero. The best that could happen is a wiring diagram of how your engine was originally set up, then you have to figure out what was changed for your conversions.
For that to happen, we will need a Mercruiser serial number for your engine.