No Power At Coil

[rtoomey641]

Please Help I have no power at ignition coil I have power to solenoid but nothing coming out of either small terminal motor does turn over shouldn,t I have power coming out one terminal goes to coil

 

[markhodges78]

Sounds like blowed ignintion fuse

 

[Bt Doctur]

Or a million other thing, but not knowing WHAT you have makes it impossable to answer

 

[rtoomey641]

Sorry it is a 485 mercruiser

 

[markhodges78]

I would first check for power at the switch you should have it coming in and going out

 

[Bt Doctur]

turning over means there is power at the switch and power being applied to the yellow/red solenoid wire.. Test the "I" post for 12V ,this should have a purple wire and a 20A fuse. The purple wire goes to the electric choke first, then a resistance wire to the + side of the coil

 

[rtoomey641]

No power a terminal with purple wire

 

[Bt Doctur]

Then the ignition switch is bad

 

[rtoomey641]

Switch is new so short from switch to coil or solenoid?

 

[stonyloam]

if it is turning over you are getting power the the slave solenoid. The slave should provide voltage to the coil + while the starter is spinning. Does the engine try to start when it to turning over?

 

[rtoomey641]

No not getting spark

 

[Bt Doctur]

The switch has 3 posts, B battery red or orange
I ignition purple wire and fuse
S solenoid
If the key switch has power to fire the solenoid and no voltage on the I terminal the I terninal is dead internally or you have the switch wired incorrectly.

 

[stonyloam]

OK, the 485 is a 470 type engine that should get 12v from the slave solenoid when the engine so being turned over by the starter. Get a voltmeter and check for voltage on the coil when the engine is turning over. If you have voltage and no spark, look at the points. You can also run a temporary jumper directly from the battery to the coil + to look for spark.

 

[O'sullyglastron]

Hi there! Please help! Glastron bayflite 1973, I have a Mercruiser 140 1979ish model year, and I am not getting power to coil. I can hot wire and run but it bypasses the resistance circuit and ends up melting my coil.. please help I believe the starter solenoid "I" terminal is dead.. I have 12v all over but not on the I terminal. Key switch cranks engine but no spark

 

[O'sullyglastron]

This site has been a great resource so far.. looking forward to a response!! Thank you very much!

 

[wellcraft-classic210]

Hi -- Welcome
You should start your own thread for a new problem -- the one your posting on was last used in 2016 and using it is called " Hijacking "