I have a 1982 mercruiser140i/o no spark

[Brianh74]

I needhelp why i have no spark

 

[Bt Doctur]

Re: I have a 1982 mercruiser140i/o no spark

Safety lanyard switch
bad ign switch
battery stolen
oxidized points
bad coil
no voltage to coil
The list is endless, can you tell us what you have tried so far?

 

[solar7647]

Re: I have a 1982 mercruiser140i/o no spark

We are going to need a little more info to help. Is it no spark at the plugs, distributor, coil? Have you done any trouble shooting? Do you have a manual? Did it happen all of a sudden? Is this the first its been started this year?

Stuf like that

 

[Brianh74]

Re: I have a 1982 mercruiser140i/o no spark

safety lanyard switch
bad ign switch
battery stolen
oxidized points
bad coil
no voltage to coil
the list is endless, can you tell us what you have tried so far?

tried another coil, new cap and rotor new baterry

 

[Bt Doctur]

Re: I have a 1982 mercruiser140i/o no spark

Is there 12V at the + side of the coil with the key in the "ON" position
Are the points installed properly and gap set

 

[Brianh74]

Re: I have a 1982 mercruiser140i/o no spark

we are going to need a little more info to help. Is it no spark at the plugs, distributor, coil? Have you done any trouble shooting? Do you have a manual? Did it happen all of a sudden? Is this the first its been started this year?

Stuf like that

no spark at first plug, and yes the boat was running this year i have no manual

 

[Bt Doctur]

Re: I have a 1982 mercruiser140i/o no spark

http://www.boatfix.com/merc/Servmanl/13/13covr2.pdf
Do you have 12v at the + side of the coil, you can test with a meter or a 12v bulb.

 

[cedarjunki]

Re: I have a 1982 mercruiser140i/o no spark

i have no manual

free to download! adult section!


being an 82..... points or electronic ignition?

 

[Bt Doctur]

Re: I have a 1982 mercruiser140i/o no spark

http://www.boatfix.com/merc/Servmanl/13/13B4R2.PDF
This cover both types

 

[Don S]

Re: I have a 1982 mercruiser140i/o no spark

Manual #13 is for 90 to 97 models. BT likes to use any ole manual he has laying around. For your 1982 engine, the proper service manual is #3 for the engine and #4 for the outdrive. Download them here.
http://forums.iboats.com/showthread.php?t=251571

 

[Brianh74]

Re: I have a 1982 mercruiser140i/o no spark

Is there 12V at the + side of the coil with the key in the "ON" position
Are the points installed properly and gap set

CHECKED IT OUT TURN KEY TO ON POSITIONtook volt meter across coil and only reading 4 volts why not 12 volts?

 

[Brianh74]

Re: I have a 1982 mercruiser140i/o no spark

free to download! adult section!


being an 82..... points or electronic ignition?

pionts

 

[solar7647]

Re: I have a 1982 mercruiser140i/o no spark

CHECKED IT OUT TURN KEY TO ON POSITIONtook volt meter across coil and only reading 4 volts why not 12 volts?

Proper reading is 4-9v. In your reply to my qestion from before you said no spark at plug 1, so your getting spark on the others?

If it is only the one plug, wire or plug is most likly the issue.

 

[Bondo]

Re: I have a 1982 mercruiser140i/o no spark

pionts

Ayuh,... What's the voltage there,..?? What's their Dwell,..??

 

[Brianh74]

Re: I have a 1982 mercruiser140i/o no spark

Proper reading is 4-9v. In your reply to my qestion from before you said no spark at plug 1, so your getting spark on the others?

If it is only the one plug, wire or plug is most likly the issue.

only checked the first plug out first should i try the others?

 

[solar7647]

Re: I have a 1982 mercruiser140i/o no spark

only checked the first plug out first should i try the others?

Yes, if you are not getting any spark at any:

1) remove wire from center of distributor that goes to coil, place it against the block for good ground and have someone crank the motor.

: If you get spark from the coil wire the issue is in the distributor
: if no spark from the wire remove the gray wire from the negative side of coil and try again
: if you get spark after the gray wire is removed the issue is a shorted tachometer
: if still no spark more trouble shooting needed

Try this and let us know.

 

[cbauman79]

Re: I have a 1982 mercruiser140i/o no spark

Follow the sugestions here and you'll eventually find the problem. If you are getting spark from the coil then you should replace the condensor and points. Ta was my problem.

 

[Brianh74]

Re: I have a 1982 mercruiser140i/o no spark

Yes, if you are not getting any spark at any:

1) remove wire from center of distributor that goes to coil, place it against the block for good ground and have someone crank the motor.

: If you get spark from the coil wire the issue is in the distributor
: if no spark from the wire remove the gray wire from the negative side of coil and try again
: if you get spark after the gray wire is removed the issue is a shorted tachometer
: if still no spark more trouble shooting needed

Try this and let us know.

thanks all people here i got my boat up and running changed fuel filter,emptied waterseperator, reset pionts changed cap and rotor and condenser and some fuel stabilizer and fired right up off to lake tomorrow i go for a test run yeppie