No spark

irish16

Recruit
Joined
Aug 15, 2004
Messages
4
Can,t get spark out of my coil got new one still can,t get spark. On OMC 4.3 89 point,s help it,s got me nut,s
 

tommays

Admiral
Joined
Jul 4, 2004
Messages
6,768
Re: No spark

do you have a mulitmeter it will be hard to check voltage on the ingition circut with out one<br /><br />first thing do you have power at the coil<br /><br /><br />tommays
 

irish16

Recruit
Joined
Aug 15, 2004
Messages
4
Re: No spark

ok iput the test light on + side of batt. and thuch - side of coil it lights than i thuch the + side and it lights is this right or is some thing shorted out
 

tommays

Admiral
Joined
Jul 4, 2004
Messages
6,768
Re: No spark

well a meter would be better but the clip on the test light should be conected to to a ground(-) then the point of the test should light should be used to touch places that should be + like the coil<br /><br />your going to need a shop manual or at least a wireing diagram there are a lot of places to check that will be hard to understand with out something to look at<br /><br />tommays
 

irish16

Recruit
Joined
Aug 15, 2004
Messages
4
Re: No spark

ok i have a shop manual and i looked at the diagram put the test light on - side of batt.and put the point on + side of coil turn on the key ok it lights but seems weak
 

hoot

Chief Petty Officer
Joined
Sep 8, 2002
Messages
434
Re: No spark

with the key on, your current flows thru a resistor, lowering the voltage. you get full voltage while cranking. have you pulled a plug wire (or plug) and held it close to the block? see any spark as you crank the engine? your safety kill switch and shift interupter switch can ground out a coil.
 

Scaaty

Vice Admiral
Joined
May 31, 2004
Messages
5,180
Re: No spark

Originally posted by hoot:<br /> have you pulled a plug wire (or plug) and held it close to the block? see any spark as you crank the engine?
Making sparks in a engine bay is a no-no...but a inline spark checker. Harbor Frieght has them for 5 bux
 

Dunaruna

Admiral
Joined
May 2, 2003
Messages
6,027
Re: No spark

Irish, unless you have incredibly sensitive eyes :eek: it is near impossible to gauge voltage with a test light. With coils, correct voltage is the key. A cheap multimeter will take the guess work out of your diagnosis.<br /><br />Aldo
 

Boomyal

Supreme Mariner
Joined
Aug 16, 2003
Messages
12,072
Re: No spark

You should have two wires going to the positive side of the coil. One comes from the starter solenoid and only has power (full 12+ volts) when the starter is cranking. The other comes thru a ballast resistor and only has about 9 volts constant.<br /><br />Disconnect the leads from the coil and check them with a voltage meter. (super cheap at Radio Shack)
 

Hotrods

Petty Officer 1st Class
Joined
May 30, 2004
Messages
311
Re: No spark

Just gave Irish my spark tester and meter. He is a neighbor of mine.. lets see if we can help him out.. he seen what you guys did for me in the rude section "Sticky Rings"
 
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